Move remaining files from web-platform-tests/ and update remaining paths.

third_party/WebKit/LayoutTests/imported/web-platform-tests/resources/idlharness.js

-/*
-Distributed under both the W3C Test Suite License [1] and the W3C
-3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
-policies and contribution forms [3].
-
-[1] http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
-[2] http://www.w3.org/Consortium/Legal/2008/03-bsd-license
-[3] http://www.w3.org/2004/10/27-testcases
-*/
-
-/* For user documentation see docs/idlharness.md */
-
-/**
- * Notes for people who want to edit this file (not just use it as a library):
- *
- * Most of the interesting stuff happens in the derived classes of IdlObject,
- * especially IdlInterface.  The entry point for all IdlObjects is .test(),
- * which is called by IdlArray.test().  An IdlObject is conceptually just
- * "thing we want to run tests on", and an IdlArray is an array of IdlObjects
- * with some additional data thrown in.
- *
- * The object model is based on what WebIDLParser.js produces, which is in turn
- * based on its pegjs grammar.  If you want to figure out what properties an
- * object will have from WebIDLParser.js, the best way is to look at the
- * grammar:
- *
- *   https://github.com/darobin/webidl.js/blob/master/lib/grammar.peg
- *
- * So for instance:
- *
- *   // interface definition
- *   interface
- *       =   extAttrs:extendedAttributeList? S? "interface" S name:identifier w herit:ifInheritance? w "{" w mem:ifMember* w "}" w ";" w
- *           { return { type: "interface", name: name, inheritance: herit, members: mem, extAttrs: extAttrs }; }
- *
- * This means that an "interface" object will have a .type property equal to
- * the string "interface", a .name property equal to the identifier that the
- * parser found, an .inheritance property equal to either null or the result of
- * the "ifInheritance" production found elsewhere in the grammar, and so on.
- * After each grammatical production is a JavaScript function in curly braces
- * that gets called with suitable arguments and returns some JavaScript value.
- *
- * (Note that the version of WebIDLParser.js we use might sometimes be
- * out-of-date or forked.)
- *
- * The members and methods of the classes defined by this file are all at least
- * briefly documented, hopefully.
- */
-(function(){
-"use strict";
-/// Helpers ///
-function constValue (cnt) {
-    if (cnt.type === "null") return null;
-    if (cnt.type === "NaN") return NaN;
-    if (cnt.type === "Infinity") return cnt.negative ? -Infinity : Infinity;
-    return cnt.value;
-}
-
-function minOverloadLength(overloads) {
-    if (!overloads.length) {
-        return 0;
-    }
-
-    return overloads.map(function(attr) {
-        return attr.arguments ? attr.arguments.filter(function(arg) {
-            return !arg.optional && !arg.variadic;
-        }).length : 0;
-    })
-    .reduce(function(m, n) { return Math.min(m, n); });
-}
-
-function throwOrReject(a_test, operation, fn, obj, args,  message, cb) {
-    if (operation.idlType.generic !== "Promise") {
-        assert_throws(new TypeError(), function() {
-            fn.apply(obj, args);
-        }, message);
-        cb();
-    } else {
-        try {
-            promise_rejects(a_test, new TypeError(), fn.apply(obj, args)).then(cb, cb);
-        } catch (e){
-            a_test.step(function() {
-                assert_unreached("Throws \"" + e + "\" instead of rejecting promise");
-                cb();
-            });
-        }
-    }
-}
-
-function awaitNCallbacks(n, cb, ctx) {
-    var counter = 0;
-    return function() {
-        counter++;
-        if (counter >= n) {
-            cb();
-        }
-    };
-}
-
-var fround = (function(){
-    if (Math.fround) return Math.fround;
-
-    var arr = new Float32Array(1);
-    return function fround(n) {
-        arr[0] = n;
-        return arr[0];
-    };
-})();
-
-/// IdlArray ///
-// Entry point
-self.IdlArray = function()
-//@{
-{
-    /**
-     * A map from strings to the corresponding named IdlObject, such as
-     * IdlInterface or IdlException.  These are the things that test() will run
-     * tests on.
-     */
-    this.members = {};
-
-    /**
-     * A map from strings to arrays of strings.  The keys are interface or
-     * exception names, and are expected to also exist as keys in this.members
-     * (otherwise they'll be ignored).  This is populated by add_objects() --
-     * see documentation at the start of the file.  The actual tests will be
-     * run by calling this.members[name].test_object(obj) for each obj in
-     * this.objects[name].  obj is a string that will be eval'd to produce a
-     * JavaScript value, which is supposed to be an object implementing the
-     * given IdlObject (interface, exception, etc.).
-     */
-    this.objects = {};
-
-    /**
-     * When adding multiple collections of IDLs one at a time, an earlier one
-     * might contain a partial interface or implements statement that depends
-     * on a later one.  Save these up and handle them right before we run
-     * tests.
-     *
-     * .partials is simply an array of objects from WebIDLParser.js'
-     * "partialinterface" production.  .implements maps strings to arrays of
-     * strings, such that
-     *
-     *   A implements B;
-     *   A implements C;
-     *   D implements E;
-     *
-     * results in { A: ["B", "C"], D: ["E"] }.
-     */
-    this.partials = [];
-    this["implements"] = {};
-};
-
-//@}
-IdlArray.prototype.add_idls = function(raw_idls)
-//@{
-{
-    /** Entry point.  See documentation at beginning of file. */
-    this.internal_add_idls(WebIDL2.parse(raw_idls));
-};
-
-//@}
-IdlArray.prototype.add_untested_idls = function(raw_idls)
-//@{
-{
-    /** Entry point.  See documentation at beginning of file. */
-    var parsed_idls = WebIDL2.parse(raw_idls);
-    for (var i = 0; i < parsed_idls.length; i++)
-    {
-        parsed_idls[i].untested = true;
-        if ("members" in parsed_idls[i])
-        {
-            for (var j = 0; j < parsed_idls[i].members.length; j++)
-            {
-                parsed_idls[i].members[j].untested = true;
-            }
-        }
-    }
-    this.internal_add_idls(parsed_idls);
-};
-
-//@}
-IdlArray.prototype.internal_add_idls = function(parsed_idls)
-//@{
-{
-    /**
-     * Internal helper called by add_idls() and add_untested_idls().
-     * parsed_idls is an array of objects that come from WebIDLParser.js's
-     * "definitions" production.  The add_untested_idls() entry point
-     * additionally sets an .untested property on each object (and its
-     * .members) so that they'll be skipped by test() -- they'll only be
-     * used for base interfaces of tested interfaces, return types, etc.
-     */
-    parsed_idls.forEach(function(parsed_idl)
-    {
-        if (parsed_idl.type == "interface" && parsed_idl.partial)
-        {
-            this.partials.push(parsed_idl);
-            return;
-        }
-
-        if (parsed_idl.type == "implements")
-        {
-            if (!(parsed_idl.target in this["implements"]))
-            {
-                this["implements"][parsed_idl.target] = [];
-            }
-            this["implements"][parsed_idl.target].push(parsed_idl["implements"]);
-            return;
-        }
-
-        parsed_idl.array = this;
-        if (parsed_idl.name in this.members)
-        {
-            throw "Duplicate identifier " + parsed_idl.name;
-        }
-        switch(parsed_idl.type)
-        {
-        case "interface":
-            this.members[parsed_idl.name] =
-                new IdlInterface(parsed_idl, /* is_callback = */ false);
-            break;
-
-        case "dictionary":
-            // Nothing to test, but we need the dictionary info around for type
-            // checks
-            this.members[parsed_idl.name] = new IdlDictionary(parsed_idl);
-            break;
-
-        case "typedef":
-            this.members[parsed_idl.name] = new IdlTypedef(parsed_idl);
-            break;
-
-        case "callback":
-            // TODO
-            console.log("callback not yet supported");
-            break;
-
-        case "enum":
-            this.members[parsed_idl.name] = new IdlEnum(parsed_idl);
-            break;
-
-        case "callback interface":
-            this.members[parsed_idl.name] =
-                new IdlInterface(parsed_idl, /* is_callback = */ true);
-            break;
-
-        default:
-            throw parsed_idl.name + ": " + parsed_idl.type + " not yet supported";
-        }
-    }.bind(this));
-};
-
-//@}
-IdlArray.prototype.add_objects = function(dict)
-//@{
-{
-    /** Entry point.  See documentation at beginning of file. */
-    for (var k in dict)
-    {
-        if (k in this.objects)
-        {
-            this.objects[k] = this.objects[k].concat(dict[k]);
-        }
-        else
-        {
-            this.objects[k] = dict[k];
-        }
-    }
-};
-
-//@}
-IdlArray.prototype.prevent_multiple_testing = function(name)
-//@{
-{
-    /** Entry point.  See documentation at beginning of file. */
-    this.members[name].prevent_multiple_testing = true;
-};
-
-//@}
-IdlArray.prototype.recursively_get_implements = function(interface_name)
-//@{
-{
-    /**
-     * Helper function for test().  Returns an array of things that implement
-     * interface_name, so if the IDL contains
-     *
-     *   A implements B;
-     *   B implements C;
-     *   B implements D;
-     *
-     * then recursively_get_implements("A") should return ["B", "C", "D"].
-     */
-    var ret = this["implements"][interface_name];
-    if (ret === undefined)
-    {
-        return [];
-    }
-    for (var i = 0; i < this["implements"][interface_name].length; i++)
-    {
-        ret = ret.concat(this.recursively_get_implements(ret[i]));
-        if (ret.indexOf(ret[i]) != ret.lastIndexOf(ret[i]))
-        {
-            throw "Circular implements statements involving " + ret[i];
-        }
-    }
-    return ret;
-};
-
-//@}
-IdlArray.prototype.test = function()
-//@{
-{
-    /** Entry point.  See documentation at beginning of file. */
-
-    // First merge in all the partial interfaces and implements statements we
-    // encountered.
-    this.partials.forEach(function(parsed_idl)
-    {
-        if (!(parsed_idl.name in this.members)
-        || !(this.members[parsed_idl.name] instanceof IdlInterface))
-        {
-            throw "Partial interface " + parsed_idl.name + " with no original interface";
-        }
-        if (parsed_idl.extAttrs)
-        {
-            parsed_idl.extAttrs.forEach(function(extAttr)
-            {
-                this.members[parsed_idl.name].extAttrs.push(extAttr);
-            }.bind(this));
-        }
-        parsed_idl.members.forEach(function(member)
-        {
-            this.members[parsed_idl.name].members.push(new IdlInterfaceMember(member));
-        }.bind(this));
-    }.bind(this));
-    this.partials = [];
-
-    for (var lhs in this["implements"])
-    {
-        this.recursively_get_implements(lhs).forEach(function(rhs)
-        {
-            var errStr = lhs + " implements " + rhs + ", but ";
-            if (!(lhs in this.members)) throw errStr + lhs + " is undefined.";
-            if (!(this.members[lhs] instanceof IdlInterface)) throw errStr + lhs + " is not an interface.";
-            if (!(rhs in this.members)) throw errStr + rhs + " is undefined.";
-            if (!(this.members[rhs] instanceof IdlInterface)) throw errStr + rhs + " is not an interface.";
-            this.members[rhs].members.forEach(function(member)
-            {
-                this.members[lhs].members.push(new IdlInterfaceMember(member));
-            }.bind(this));
-        }.bind(this));
-    }
-    this["implements"] = {};
-
-    // Now run test() on every member, and test_object() for every object.
-    for (var name in this.members)
-    {
-        this.members[name].test();
-        if (name in this.objects)
-        {
-            this.objects[name].forEach(function(str)
-            {
-                this.members[name].test_object(str);
-            }.bind(this));
-        }
-    }
-};
-
-//@}
-IdlArray.prototype.assert_type_is = function(value, type)
-//@{
-{
-    /**
-     * Helper function that tests that value is an instance of type according
-     * to the rules of WebIDL.  value is any JavaScript value, and type is an
-     * object produced by WebIDLParser.js' "type" production.  That production
-     * is fairly elaborate due to the complexity of WebIDL's types, so it's
-     * best to look at the grammar to figure out what properties it might have.
-     */
-    if (type.idlType == "any")
-    {
-        // No assertions to make
-        return;
-    }
-
-    if (type.nullable && value === null)
-    {
-        // This is fine
-        return;
-    }
-
-    if (type.array)
-    {
-        // TODO: not supported yet
-        return;
-    }
-
-    if (type.sequence)
-    {
-        assert_true(Array.isArray(value), "is not array");
-        if (!value.length)
-        {
-            // Nothing we can do.
-            return;
-        }
-        this.assert_type_is(value[0], type.idlType.idlType);
-        return;
-    }
-
-    type = type.idlType;
-
-    switch(type)
-    {
-        case "void":
-            assert_equals(value, undefined);
-            return;
-
-        case "boolean":
-            assert_equals(typeof value, "boolean");
-            return;
-
-        case "byte":
-            assert_equals(typeof value, "number");
-            assert_equals(value, Math.floor(value), "not an integer");
-            assert_true(-128 <= value && value <= 127, "byte " + value + " not in range [-128, 127]");
-            return;
-
-        case "octet":
-            assert_equals(typeof value, "number");
-            assert_equals(value, Math.floor(value), "not an integer");
-            assert_true(0 <= value && value <= 255, "octet " + value + " not in range [0, 255]");
-            return;
-
-        case "short":
-            assert_equals(typeof value, "number");
-            assert_equals(value, Math.floor(value), "not an integer");
-            assert_true(-32768 <= value && value <= 32767, "short " + value + " not in range [-32768, 32767]");
-            return;
-
-        case "unsigned short":
-            assert_equals(typeof value, "number");
-            assert_equals(value, Math.floor(value), "not an integer");
-            assert_true(0 <= value && value <= 65535, "unsigned short " + value + " not in range [0, 65535]");
-            return;
-
-        case "long":
-            assert_equals(typeof value, "number");
-            assert_equals(value, Math.floor(value), "not an integer");
-            assert_true(-2147483648 <= value && value <= 2147483647, "long " + value + " not in range [-2147483648, 2147483647]");
-            return;
-
-        case "unsigned long":
-            assert_equals(typeof value, "number");
-            assert_equals(value, Math.floor(value), "not an integer");
-            assert_true(0 <= value && value <= 4294967295, "unsigned long " + value + " not in range [0, 4294967295]");
-            return;
-
-        case "long long":
-            assert_equals(typeof value, "number");
-            return;
-
-        case "unsigned long long":
-        case "DOMTimeStamp":
-            assert_equals(typeof value, "number");
-            assert_true(0 <= value, "unsigned long long is negative");
-            return;
-
-        case "float":
-            assert_equals(typeof value, "number");
-            assert_equals(value, fround(value), "float rounded to 32-bit float should be itself");
-            assert_not_equals(value, Infinity);
-            assert_not_equals(value, -Infinity);
-            assert_not_equals(value, NaN);
-            return;
-
-        case "DOMHighResTimeStamp":
-        case "double":
-            assert_equals(typeof value, "number");
-            assert_not_equals(value, Infinity);
-            assert_not_equals(value, -Infinity);
-            assert_not_equals(value, NaN);
-            return;
-
-        case "unrestricted float":
-            assert_equals(typeof value, "number");
-            assert_equals(value, fround(value), "unrestricted float rounded to 32-bit float should be itself");
-            return;
-
-        case "unrestricted double":
-            assert_equals(typeof value, "number");
-            return;
-
-        case "DOMString":
-            assert_equals(typeof value, "string");
-            return;
-
-        case "ByteString":
-            assert_equals(typeof value, "string");
-            assert_regexp_match(value, /^[\x00-\x7F]*$/);
-            return;
-
-        case "USVString":
-            assert_equals(typeof value, "string");
-            assert_regexp_match(value, /^([\x00-\ud7ff\ue000-\uffff]|[\ud800-\udbff][\udc00-\udfff])*$/);
-            return;
-
-        case "object":
-            assert_true(typeof value == "object" || typeof value == "function", "wrong type: not object or function");
-            return;
-    }
-
-    if (!(type in this.members))
-    {
-        throw "Unrecognized type " + type;
-    }
-
-    if (this.members[type] instanceof IdlInterface)
-    {
-        // We don't want to run the full
-        // IdlInterface.prototype.test_instance_of, because that could result
-        // in an infinite loop.  TODO: This means we don't have tests for
-        // NoInterfaceObject interfaces, and we also can't test objects that
-        // come from another self.
-        assert_true(typeof value == "object" || typeof value == "function", "wrong type: not object or function");
-        if (value instanceof Object
-        && !this.members[type].has_extended_attribute("NoInterfaceObject")
-        && type in self)
-        {
-            assert_true(value instanceof self[type], "not instanceof " + type);
-        }
-    }
-    else if (this.members[type] instanceof IdlEnum)
-    {
-        assert_equals(typeof value, "string");
-    }
-    else if (this.members[type] instanceof IdlDictionary)
-    {
-        // TODO: Test when we actually have something to test this on
-    }
-    else if (this.members[type] instanceof IdlTypedef)
-    {
-        // TODO: Test when we actually have something to test this on
-    }
-    else
-    {
-        throw "Type " + type + " isn't an interface or dictionary";
-    }
-};
-//@}
-
-/// IdlObject ///
-function IdlObject() {}
-IdlObject.prototype.test = function()
-//@{
-{
-    /**
-     * By default, this does nothing, so no actual tests are run for IdlObjects
-     * that don't define any (e.g., IdlDictionary at the time of this writing).
-     */
-};
-
-//@}
-IdlObject.prototype.has_extended_attribute = function(name)
-//@{
-{
-    /**
-     * This is only meaningful for things that support extended attributes,
-     * such as interfaces, exceptions, and members.
-     */
-    return this.extAttrs.some(function(o)
-    {
-        return o.name == name;
-    });
-};
-
-//@}
-
-/// IdlDictionary ///
-// Used for IdlArray.prototype.assert_type_is
-function IdlDictionary(obj)
-//@{
-{
-    /**
-     * obj is an object produced by the WebIDLParser.js "dictionary"
-     * production.
-     */
-
-    /** Self-explanatory. */
-    this.name = obj.name;
-
-    /** An array of objects produced by the "dictionaryMember" production. */
-    this.members = obj.members;
-
-    /**
-     * The name (as a string) of the dictionary type we inherit from, or null
-     * if there is none.
-     */
-    this.base = obj.inheritance;
-}
-
-//@}
-IdlDictionary.prototype = Object.create(IdlObject.prototype);
-
-/// IdlInterface ///
-function IdlInterface(obj, is_callback) {
-    /**
-     * obj is an object produced by the WebIDLParser.js "interface" production.
-     */
-
-    /** Self-explanatory. */
-    this.name = obj.name;
-
-    /** A back-reference to our IdlArray. */
-    this.array = obj.array;
-
-    /**
-     * An indicator of whether we should run tests on the interface object and
-     * interface prototype object. Tests on members are controlled by .untested
-     * on each member, not this.
-     */
-    this.untested = obj.untested;
-
-    /** An array of objects produced by the "ExtAttr" production. */
-    this.extAttrs = obj.extAttrs;
-
-    /** An array of IdlInterfaceMembers. */
-    this.members = obj.members.map(function(m){return new IdlInterfaceMember(m); });
-    if (this.has_extended_attribute("Unforgeable")) {
-        this.members
-            .filter(function(m) { return !m["static"] && (m.type == "attribute" || m.type == "operation"); })
-            .forEach(function(m) { return m.isUnforgeable = true; });
-    }
-
-    /**
-     * The name (as a string) of the type we inherit from, or null if there is
-     * none.
-     */
-    this.base = obj.inheritance;
-
-    this._is_callback = is_callback;
-}
-IdlInterface.prototype = Object.create(IdlObject.prototype);
-IdlInterface.prototype.is_callback = function()
-//@{
-{
-    return this._is_callback;
-};
-//@}
-
-IdlInterface.prototype.has_constants = function()
-//@{
-{
-    return this.members.some(function(member) {
-        return member.type === "const";
-    });
-};
-//@}
-
-IdlInterface.prototype.is_global = function()
-//@{
-{
-    return this.extAttrs.some(function(attribute) {
-        return attribute.name === "Global" ||
-               attribute.name === "PrimaryGlobal";
-    });
-};
-//@}
-
-IdlInterface.prototype.test = function()
-//@{
-{
-    if (this.has_extended_attribute("NoInterfaceObject"))
-    {
-        // No tests to do without an instance.  TODO: We should still be able
-        // to run tests on the prototype object, if we obtain one through some
-        // other means.
-        return;
-    }
-
-    if (!this.untested)
-    {
-        // First test things to do with the exception/interface object and
-        // exception/interface prototype object.
-        this.test_self();
-    }
-    // Then test things to do with its members (constants, fields, attributes,
-    // operations, . . .).  These are run even if .untested is true, because
-    // members might themselves be marked as .untested.  This might happen to
-    // interfaces if the interface itself is untested but a partial interface
-    // that extends it is tested -- then the interface itself and its initial
-    // members will be marked as untested, but the members added by the partial
-    // interface are still tested.
-    this.test_members();
-};
-//@}
-
-IdlInterface.prototype.test_self = function()
-//@{
-{
-    test(function()
-    {
-        // This function tests WebIDL as of 2015-01-13.
-        // TODO: Consider [Exposed].
-
-        // "For every interface that is exposed in a given ECMAScript global
-        // environment and:
-        // * is a callback interface that has constants declared on it, or
-        // * is a non-callback interface that is not declared with the
-        //   [NoInterfaceObject] extended attribute,
-        // a corresponding property MUST exist on the ECMAScript global object.
-        // The name of the property is the identifier of the interface, and its
-        // value is an object called the interface object.
-        // The property has the attributes { [[Writable]]: true,
-        // [[Enumerable]]: false, [[Configurable]]: true }."
-        if (this.is_callback() && !this.has_constants()) {
-            return;
-        }
-
-        // TODO: Should we test here that the property is actually writable
-        // etc., or trust getOwnPropertyDescriptor?
-        assert_own_property(self, this.name,
-                            "self does not have own property " + format_value(this.name));
-        var desc = Object.getOwnPropertyDescriptor(self, this.name);
-        assert_false("get" in desc, "self's property " + format_value(this.name) + " has getter");
-        assert_false("set" in desc, "self's property " + format_value(this.name) + " has setter");
-        assert_true(desc.writable, "self's property " + format_value(this.name) + " is not writable");
-        assert_false(desc.enumerable, "self's property " + format_value(this.name) + " is enumerable");
-        assert_true(desc.configurable, "self's property " + format_value(this.name) + " is not configurable");
-
-        if (this.is_callback()) {
-            // "The internal [[Prototype]] property of an interface object for
-            // a callback interface MUST be the Object.prototype object."
-            assert_equals(Object.getPrototypeOf(self[this.name]), Object.prototype,
-                          "prototype of self's property " + format_value(this.name) + " is not Object.prototype");
-
-            return;
-        }
-
-        // "The interface object for a given non-callback interface is a
-        // function object."
-        // "If an object is defined to be a function object, then it has
-        // characteristics as follows:"
-
-        // Its [[Prototype]] internal property is otherwise specified (see
-        // below).
-
-        // "* Its [[Get]] internal property is set as described in ECMA-262
-        //    section 9.1.8."
-        // Not much to test for this.
-
-        // "* Its [[Construct]] internal property is set as described in
-        //    ECMA-262 section 19.2.2.3."
-        // Tested below if no constructor is defined.  TODO: test constructors
-        // if defined.
-
-        // "* Its @@hasInstance property is set as described in ECMA-262
-        //    section 19.2.3.8, unless otherwise specified."
-        // TODO
-
-        // ES6 (rev 30) 19.1.3.6:
-        // "Else, if O has a [[Call]] internal method, then let builtinTag be
-        // "Function"."
-        assert_class_string(self[this.name], "Function", "class string of " + this.name);
-
-        // "The [[Prototype]] internal property of an interface object for a
-        // non-callback interface is determined as follows:"
-        var prototype = Object.getPrototypeOf(self[this.name]);
-        if (this.base) {
-            // "* If the interface inherits from some other interface, the
-            //    value of [[Prototype]] is the interface object for that other
-            //    interface."
-            var has_interface_object =
-                !this.array
-                     .members[this.base]
-                     .has_extended_attribute("NoInterfaceObject");
-            if (has_interface_object) {
-                assert_own_property(self, this.base,
-                                    'should inherit from ' + this.base +
-                                    ', but self has no such property');
-                assert_equals(prototype, self[this.base],
-                              'prototype of ' + this.name + ' is not ' +
-                              this.base);
-            }
-        } else {
-            // "If the interface doesn't inherit from any other interface, the
-            // value of [[Prototype]] is %FunctionPrototype% ([ECMA-262],
-            // section 6.1.7.4)."
-            assert_equals(prototype, Function.prototype,
-                          "prototype of self's property " + format_value(this.name) + " is not Function.prototype");
-        }
-
-        if (!this.has_extended_attribute("Constructor")) {
-            // "The internal [[Call]] method of the interface object behaves as
-            // follows . . .
-            //
-            // "If I was not declared with a [Constructor] extended attribute,
-            // then throw a TypeError."
-            assert_throws(new TypeError(), function() {
-                self[this.name]();
-            }.bind(this), "interface object didn't throw TypeError when called as a function");
-            assert_throws(new TypeError(), function() {
-                new self[this.name]();
-            }.bind(this), "interface object didn't throw TypeError when called as a constructor");
-        }
-    }.bind(this), this.name + " interface: existence and properties of interface object");
-
-    if (!this.is_callback()) {
-        test(function() {
-            // This function tests WebIDL as of 2014-10-25.
-            // https://heycam.github.io/webidl/#es-interface-call
-
-            assert_own_property(self, this.name,
-                                "self does not have own property " + format_value(this.name));
-
-            // "Interface objects for non-callback interfaces MUST have a
-            // property named “length” with attributes { [[Writable]]: false,
-            // [[Enumerable]]: false, [[Configurable]]: true } whose value is
-            // a Number."
-            assert_own_property(self[this.name], "length");
-            var desc = Object.getOwnPropertyDescriptor(self[this.name], "length");
-            assert_false("get" in desc, this.name + ".length has getter");
-            assert_false("set" in desc, this.name + ".length has setter");
-            assert_false(desc.writable, this.name + ".length is writable");
-            assert_false(desc.enumerable, this.name + ".length is enumerable");
-            assert_true(desc.configurable, this.name + ".length is not configurable");
-
-            var constructors = this.extAttrs
-                .filter(function(attr) { return attr.name == "Constructor"; });
-            var expected_length = minOverloadLength(constructors);
-            assert_equals(self[this.name].length, expected_length, "wrong value for " + this.name + ".length");
-        }.bind(this), this.name + " interface object length");
-    }
-
-    if (!this.is_callback() || this.has_constants()) {
-        test(function() {
-            // This function tests WebIDL as of 2015-11-17.
-            // https://heycam.github.io/webidl/#interface-object
-
-            assert_own_property(self, this.name,
-                                "self does not have own property " + format_value(this.name));
-
-            // "All interface objects must have a property named “name” with
-            // attributes { [[Writable]]: false, [[Enumerable]]: false,
-            // [[Configurable]]: true } whose value is the identifier of the
-            // corresponding interface."
-
-            assert_own_property(self[this.name], "name");
-            var desc = Object.getOwnPropertyDescriptor(self[this.name], "name");
-            assert_false("get" in desc, this.name + ".name has getter");
-            assert_false("set" in desc, this.name + ".name has setter");
-            assert_false(desc.writable, this.name + ".name is writable");
-            assert_false(desc.enumerable, this.name + ".name is enumerable");
-            assert_true(desc.configurable, this.name + ".name is not configurable");
-            assert_equals(self[this.name].name, this.name, "wrong value for " + this.name + ".name");
-        }.bind(this), this.name + " interface object name");
-    }
-
-    // TODO: Test named constructors if I find any interfaces that have them.
-
-    test(function()
-    {
-        // This function tests WebIDL as of 2015-01-21.
-        // https://heycam.github.io/webidl/#interface-object
-
-        if (this.is_callback() && !this.has_constants()) {
-            return;
-        }
-
-        assert_own_property(self, this.name,
-                            "self does not have own property " + format_value(this.name));
-
-        if (this.is_callback()) {
-            assert_false("prototype" in self[this.name],
-                         this.name + ' should not have a "prototype" property');
-            return;
-        }
-
-        // "An interface object for a non-callback interface must have a
-        // property named “prototype” with attributes { [[Writable]]: false,
-        // [[Enumerable]]: false, [[Configurable]]: false } whose value is an
-        // object called the interface prototype object. This object has
-        // properties that correspond to the regular attributes and regular
-        // operations defined on the interface, and is described in more detail
-        // in section 4.5.4 below."
-        assert_own_property(self[this.name], "prototype",
-                            'interface "' + this.name + '" does not have own property "prototype"');
-        var desc = Object.getOwnPropertyDescriptor(self[this.name], "prototype");
-        assert_false("get" in desc, this.name + ".prototype has getter");
-        assert_false("set" in desc, this.name + ".prototype has setter");
-        assert_false(desc.writable, this.name + ".prototype is writable");
-        assert_false(desc.enumerable, this.name + ".prototype is enumerable");
-        assert_false(desc.configurable, this.name + ".prototype is configurable");
-
-        // Next, test that the [[Prototype]] of the interface prototype object
-        // is correct. (This is made somewhat difficult by the existence of
-        // [NoInterfaceObject].)
-        // TODO: Aryeh thinks there's at least other place in this file where
-        //       we try to figure out if an interface prototype object is
-        //       correct. Consolidate that code.
-
-        // "The interface prototype object for a given interface A must have an
-        // internal [[Prototype]] property whose value is returned from the
-        // following steps:
-        // "If A is declared with the [Global] or [PrimaryGlobal] extended
-        // attribute, and A supports named properties, then return the named
-        // properties object for A, as defined in section 4.5.5 below.
-        // "Otherwise, if A is declared to inherit from another interface, then
-        // return the interface prototype object for the inherited interface.
-        // "Otherwise, if A is declared with the [ArrayClass] extended
-        // attribute, then return %ArrayPrototype% ([ECMA-262], section
-        // 6.1.7.4).
-        // "Otherwise, return %ObjectPrototype% ([ECMA-262], section 6.1.7.4).
-        // ([ECMA-262], section 15.2.4).
-        if (this.name === "Window") {
-            assert_class_string(Object.getPrototypeOf(self[this.name].prototype),
-                                'WindowProperties',
-                                'Class name for prototype of Window' +
-                                '.prototype is not "WindowProperties"');
-        } else {
-            var inherit_interface, inherit_interface_has_interface_object;
-            if (this.base) {
-                inherit_interface = this.base;
-                inherit_interface_has_interface_object =
-                    !this.array
-                         .members[inherit_interface]
-                         .has_extended_attribute("NoInterfaceObject");
-            } else if (this.has_extended_attribute('ArrayClass')) {
-                inherit_interface = 'Array';
-                inherit_interface_has_interface_object = true;
-            } else {
-                inherit_interface = 'Object';
-                inherit_interface_has_interface_object = true;
-            }
-            if (inherit_interface_has_interface_object) {
-                assert_own_property(self, inherit_interface,
-                                    'should inherit from ' + inherit_interface + ', but self has no such property');
-                assert_own_property(self[inherit_interface], 'prototype',
-                                    'should inherit from ' + inherit_interface + ', but that object has no "prototype" property');
-                assert_equals(Object.getPrototypeOf(self[this.name].prototype),
-                              self[inherit_interface].prototype,
-                              'prototype of ' + this.name + '.prototype is not ' + inherit_interface + '.prototype');
-            } else {
-                // We can't test that we get the correct object, because this is the
-                // only way to get our hands on it. We only test that its class
-                // string, at least, is correct.
-                assert_class_string(Object.getPrototypeOf(self[this.name].prototype),
-                                    inherit_interface + 'Prototype',
-                                    'Class name for prototype of ' + this.name +
-                                    '.prototype is not "' + inherit_interface + 'Prototype"');
-            }
-        }
-
-        // "The class string of an interface prototype object is the
-        // concatenation of the interface’s identifier and the string
-        // “Prototype”."
-        assert_class_string(self[this.name].prototype, this.name + "Prototype",
-                            "class string of " + this.name + ".prototype");
-        // String() should end up calling {}.toString if nothing defines a
-        // stringifier.
-        if (!this.has_stringifier()) {
-            assert_equals(String(self[this.name].prototype), "[object " + this.name + "Prototype]",
-                    "String(" + this.name + ".prototype)");
-        }
-    }.bind(this), this.name + " interface: existence and properties of interface prototype object");
-
-    test(function()
-    {
-        if (this.is_callback() && !this.has_constants()) {
-            return;
-        }
-
-        assert_own_property(self, this.name,
-                            "self does not have own property " + format_value(this.name));
-
-        if (this.is_callback()) {
-            assert_false("prototype" in self[this.name],
-                         this.name + ' should not have a "prototype" property');
-            return;
-        }
-
-        assert_own_property(self[this.name], "prototype",
-                            'interface "' + this.name + '" does not have own property "prototype"');
-
-        // "If the [NoInterfaceObject] extended attribute was not specified on
-        // the interface, then the interface prototype object must also have a
-        // property named “constructor” with attributes { [[Writable]]: true,
-        // [[Enumerable]]: false, [[Configurable]]: true } whose value is a
-        // reference to the interface object for the interface."
-        assert_own_property(self[this.name].prototype, "constructor",
-                            this.name + '.prototype does not have own property "constructor"');
-        var desc = Object.getOwnPropertyDescriptor(self[this.name].prototype, "constructor");
-        assert_false("get" in desc, this.name + ".prototype.constructor has getter");
-        assert_false("set" in desc, this.name + ".prototype.constructor has setter");
-        assert_true(desc.writable, this.name + ".prototype.constructor is not writable");
-        assert_false(desc.enumerable, this.name + ".prototype.constructor is enumerable");
-        assert_true(desc.configurable, this.name + ".prototype.constructor in not configurable");
-        assert_equals(self[this.name].prototype.constructor, self[this.name],
-                      this.name + '.prototype.constructor is not the same object as ' + this.name);
-    }.bind(this), this.name + ' interface: existence and properties of interface prototype object\'s "constructor" property');
-};
-
-//@}
-IdlInterface.prototype.test_member_const = function(member)
-//@{
-{
-    if (!this.has_constants()) {
-        throw "Internal error: test_member_const called without any constants";
-    }
-
-    test(function()
-    {
-        assert_own_property(self, this.name,
-                            "self does not have own property " + format_value(this.name));
-
-        // "For each constant defined on an interface A, there must be
-        // a corresponding property on the interface object, if it
-        // exists."
-        assert_own_property(self[this.name], member.name);
-        // "The value of the property is that which is obtained by
-        // converting the constant’s IDL value to an ECMAScript
-        // value."
-        assert_equals(self[this.name][member.name], constValue(member.value),
-                      "property has wrong value");
-        // "The property has attributes { [[Writable]]: false,
-        // [[Enumerable]]: true, [[Configurable]]: false }."
-        var desc = Object.getOwnPropertyDescriptor(self[this.name], member.name);
-        assert_false("get" in desc, "property has getter");
-        assert_false("set" in desc, "property has setter");
-        assert_false(desc.writable, "property is writable");
-        assert_true(desc.enumerable, "property is not enumerable");
-        assert_false(desc.configurable, "property is configurable");
-    }.bind(this), this.name + " interface: constant " + member.name + " on interface object");
-
-    // "In addition, a property with the same characteristics must
-    // exist on the interface prototype object."
-    test(function()
-    {
-        assert_own_property(self, this.name,
-                            "self does not have own property " + format_value(this.name));
-
-        if (this.is_callback()) {
-            assert_false("prototype" in self[this.name],
-                         this.name + ' should not have a "prototype" property');
-            return;
-        }
-
-        assert_own_property(self[this.name], "prototype",
-                            'interface "' + this.name + '" does not have own property "prototype"');
-
-        assert_own_property(self[this.name].prototype, member.name);
-        assert_equals(self[this.name].prototype[member.name], constValue(member.value),
-                      "property has wrong value");
-        var desc = Object.getOwnPropertyDescriptor(self[this.name], member.name);
-        assert_false("get" in desc, "property has getter");
-        assert_false("set" in desc, "property has setter");
-        assert_false(desc.writable, "property is writable");
-        assert_true(desc.enumerable, "property is not enumerable");
-        assert_false(desc.configurable, "property is configurable");
-    }.bind(this), this.name + " interface: constant " + member.name + " on interface prototype object");
-};
-
-
-//@}
-IdlInterface.prototype.test_member_attribute = function(member)
-//@{
-{
-    test(function()
-    {
-        if (this.is_callback() && !this.has_constants()) {
-            return;
-        }
-
-        assert_own_property(self, this.name,
-                            "self does not have own property " + format_value(this.name));
-        assert_own_property(self[this.name], "prototype",
-                            'interface "' + this.name + '" does not have own property "prototype"');
-
-        if (member["static"]) {
-            assert_own_property(self[this.name], member.name,
-                "The interface object must have a property " +
-                format_value(member.name));
-        } else if (this.is_global()) {
-            assert_own_property(self, member.name,
-                "The global object must have a property " +
-                format_value(member.name));
-            assert_false(member.name in self[this.name].prototype,
-                "The prototype object must not have a property " +
-                format_value(member.name));
-
-            var getter = Object.getOwnPropertyDescriptor(self, member.name).get;
-            assert_equals(typeof(getter), "function",
-                          format_value(member.name) + " must have a getter");
-
-            // Try/catch around the get here, since it can legitimately throw.
-            // If it does, we obviously can't check for equality with direct
-            // invocation of the getter.
-            var gotValue;
-            var propVal;
-            try {
-                propVal = self[member.name];
-                gotValue = true;
-            } catch (e) {
-                gotValue = false;
-            }
-            if (gotValue) {
-                assert_equals(propVal, getter.call(undefined),
-                              "Gets on a global should not require an explicit this");
-            }
-
-            this.do_interface_attribute_asserts(self, member);
-        } else {
-            assert_true(member.name in self[this.name].prototype,
-                "The prototype object must have a property " +
-                format_value(member.name));
-
-            if (!member.has_extended_attribute("LenientThis")) {
-                assert_throws(new TypeError(), function() {
-                    self[this.name].prototype[member.name];
-                }.bind(this), "getting property on prototype object must throw TypeError");
-            } else {
-                assert_equals(self[this.name].prototype[member.name], undefined,
-                              "getting property on prototype object must return undefined");
-            }
-            this.do_interface_attribute_asserts(self[this.name].prototype, member);
-        }
-    }.bind(this), this.name + " interface: attribute " + member.name);
-};
-
-//@}
-IdlInterface.prototype.test_member_operation = function(member)
-//@{
-{
-    var a_test = async_test(this.name + " interface: operation " + member.name +
-                            "(" + member.arguments.map(
-                                function(m) {return m.idlType.idlType; } )
-                            +")");
-    a_test.step(function()
-    {
-        // This function tests WebIDL as of 2015-12-29.
-        // https://heycam.github.io/webidl/#es-operations
-
-        if (this.is_callback() && !this.has_constants()) {
-            a_test.done();
-            return;
-        }
-
-        assert_own_property(self, this.name,
-                            "self does not have own property " + format_value(this.name));
-
-        if (this.is_callback()) {
-            assert_false("prototype" in self[this.name],
-                         this.name + ' should not have a "prototype" property');
-            a_test.done();
-            return;
-        }
-
-        assert_own_property(self[this.name], "prototype",
-                            'interface "' + this.name + '" does not have own property "prototype"');
-
-        // "For each unique identifier of an exposed operation defined on the
-        // interface, there must exist a corresponding property, unless the
-        // effective overload set for that identifier and operation and with an
-        // argument count of 0 has no entries."
-
-        // TODO: Consider [Exposed].
-
-        // "The location of the property is determined as follows:"
-        var memberHolderObject;
-        // "* If the operation is static, then the property exists on the
-        //    interface object."
-        if (member["static"]) {
-            assert_own_property(self[this.name], member.name,
-                    "interface object missing static operation");
-            memberHolderObject = self[this.name];
-        // "* Otherwise, [...] if the interface was declared with the [Global]
-        //    or [PrimaryGlobal] extended attribute, then the property exists
-        //    on every object that implements the interface."
-        } else if (this.is_global()) {
-            assert_own_property(self, member.name,
-                    "global object missing non-static operation");
-            memberHolderObject = self;
-        // "* Otherwise, the property exists solely on the interface’s
-        //    interface prototype object."
-        } else {
-            assert_own_property(self[this.name].prototype, member.name,
-                    "interface prototype object missing non-static operation");
-            memberHolderObject = self[this.name].prototype;
-        }
-        this.do_member_operation_asserts(memberHolderObject, member, a_test);
-    }.bind(this));
-};
-
-//@}
-IdlInterface.prototype.do_member_operation_asserts = function(memberHolderObject, member, a_test)
-//@{
-{
-    var done = a_test.done.bind(a_test);
-    var operationUnforgeable = member.isUnforgeable;
-    var desc = Object.getOwnPropertyDescriptor(memberHolderObject, member.name);
-    // "The property has attributes { [[Writable]]: B,
-    // [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the
-    // operation is unforgeable on the interface, and true otherwise".
-    assert_false("get" in desc, "property has getter");
-    assert_false("set" in desc, "property has setter");
-    assert_equals(desc.writable, !operationUnforgeable,
-                  "property should be writable if and only if not unforgeable");
-    assert_true(desc.enumerable, "property is not enumerable");
-    assert_equals(desc.configurable, !operationUnforgeable,
-                  "property should be configurable if and only if not unforgeable");
-    // "The value of the property is a Function object whose
-    // behavior is as follows . . ."
-    assert_equals(typeof memberHolderObject[member.name], "function",
-                  "property must be a function");
-    // "The value of the Function object’s “length” property is
-    // a Number determined as follows:
-    // ". . .
-    // "Return the length of the shortest argument list of the
-    // entries in S."
-    assert_equals(memberHolderObject[member.name].length,
-        minOverloadLength(this.members.filter(function(m) {
-            return m.type == "operation" && m.name == member.name;
-        })),
-        "property has wrong .length");
-
-    // Make some suitable arguments
-    var args = member.arguments.map(function(arg) {
-        return create_suitable_object(arg.idlType);
-    });
-
-    // "Let O be a value determined as follows:
-    // ". . .
-    // "Otherwise, throw a TypeError."
-    // This should be hit if the operation is not static, there is
-    // no [ImplicitThis] attribute, and the this value is null.
-    //
-    // TODO: We currently ignore the [ImplicitThis] case.  Except we manually
-    // check for globals, since otherwise we'll invoke window.close().  And we
-    // have to skip this test for anything that on the proto chain of "self",
-    // since that does in fact have implicit-this behavior.
-    if (!member["static"]) {
-        var cb;
-        if (!this.is_global() &&
-            memberHolderObject[member.name] != self[member.name])
-        {
-            cb = awaitNCallbacks(2, done);
-            throwOrReject(a_test, member, memberHolderObject[member.name], null, args,
-                          "calling operation with this = null didn't throw TypeError", cb);
-        } else {
-            cb = awaitNCallbacks(1, done);
-        }
-
-        // ". . . If O is not null and is also not a platform object
-        // that implements interface I, throw a TypeError."
-        //
-        // TODO: Test a platform object that implements some other
-        // interface.  (Have to be sure to get inheritance right.)
-        throwOrReject(a_test, member, memberHolderObject[member.name], {}, args,
-                      "calling operation with this = {} didn't throw TypeError", cb);
-    } else {
-        done();
-    }
-}
-
-//@}
-IdlInterface.prototype.test_member_stringifier = function(member)
-//@{
-{
-    test(function()
-    {
-        if (this.is_callback() && !this.has_constants()) {
-            return;
-        }
-
-        assert_own_property(self, this.name,
-                            "self does not have own property " + format_value(this.name));
-
-        if (this.is_callback()) {
-            assert_false("prototype" in self[this.name],
-                         this.name + ' should not have a "prototype" property');
-            return;
-        }
-
-        assert_own_property(self[this.name], "prototype",
-                            'interface "' + this.name + '" does not have own property "prototype"');
-
-        // ". . . the property exists on the interface prototype object."
-        var interfacePrototypeObject = self[this.name].prototype;
-        assert_own_property(self[this.name].prototype, "toString",
-                "interface prototype object missing non-static operation");
-
-        var stringifierUnforgeable = member.isUnforgeable;
-        var desc = Object.getOwnPropertyDescriptor(interfacePrototypeObject, "toString");
-        // "The property has attributes { [[Writable]]: B,
-        // [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the
-        // stringifier is unforgeable on the interface, and true otherwise."
-        assert_false("get" in desc, "property has getter");
-        assert_false("set" in desc, "property has setter");
-        assert_equals(desc.writable, !stringifierUnforgeable,
-                      "property should be writable if and only if not unforgeable");
-        assert_true(desc.enumerable, "property is not enumerable");
-        assert_equals(desc.configurable, !stringifierUnforgeable,
-                      "property should be configurable if and only if not unforgeable");
-        // "The value of the property is a Function object, which behaves as
-        // follows . . ."
-        assert_equals(typeof interfacePrototypeObject.toString, "function",
-                      "property must be a function");
-        // "The value of the Function object’s “length” property is the Number
-        // value 0."
-        assert_equals(interfacePrototypeObject.toString.length, 0,
-            "property has wrong .length");
-
-        // "Let O be the result of calling ToObject on the this value."
-        assert_throws(new TypeError(), function() {
-            self[this.name].prototype.toString.apply(null, []);
-        }, "calling stringifier with this = null didn't throw TypeError");
-
-        // "If O is not an object that implements the interface on which the
-        // stringifier was declared, then throw a TypeError."
-        //
-        // TODO: Test a platform object that implements some other
-        // interface.  (Have to be sure to get inheritance right.)
-        assert_throws(new TypeError(), function() {
-            self[this.name].prototype.toString.apply({}, []);
-        }, "calling stringifier with this = {} didn't throw TypeError");
-    }.bind(this), this.name + " interface: stringifier");
-};
-
-//@}
-IdlInterface.prototype.test_members = function()
-//@{
-{
-    for (var i = 0; i < this.members.length; i++)
-    {
-        var member = this.members[i];
-        if (member.untested) {
-            continue;
-        }
-
-        switch (member.type) {
-        case "const":
-            this.test_member_const(member);
-            break;
-
-        case "attribute":
-            // For unforgeable attributes, we do the checks in
-            // test_interface_of instead.
-            if (!member.isUnforgeable)
-            {
-                this.test_member_attribute(member);
-            }
-            break;
-
-        case "operation":
-            // TODO: Need to correctly handle multiple operations with the same
-            // identifier.
-            // For unforgeable operations, we do the checks in
-            // test_interface_of instead.
-            if (member.name) {
-                if (!member.isUnforgeable)
-                {
-                    this.test_member_operation(member);
-                }
-            } else if (member.stringifier) {
-                this.test_member_stringifier(member);
-            }
-            break;
-
-        default:
-            // TODO: check more member types.
-            break;
-        }
-    }
-};
-
-//@}
-IdlInterface.prototype.test_object = function(desc)
-//@{
-{
-    var obj, exception = null;
-    try
-    {
-        obj = eval(desc);
-    }
-    catch(e)
-    {
-        exception = e;
-    }
-
-    var expected_typeof =
-        this.members.some(function(member) { return member.legacycaller; })
-        ? "function"
-        : "object";
-
-    this.test_primary_interface_of(desc, obj, exception, expected_typeof);
-    var current_interface = this;
-    while (current_interface)
-    {
-        if (!(current_interface.name in this.array.members))
-        {
-            throw "Interface " + current_interface.name + " not found (inherited by " + this.name + ")";
-        }
-        if (current_interface.prevent_multiple_testing && current_interface.already_tested)
-        {
-            return;
-        }
-        current_interface.test_interface_of(desc, obj, exception, expected_typeof);
-        current_interface = this.array.members[current_interface.base];
-    }
-};
-
-//@}
-IdlInterface.prototype.test_primary_interface_of = function(desc, obj, exception, expected_typeof)
-//@{
-{
-    // We can't easily test that its prototype is correct if there's no
-    // interface object, or the object is from a different global environment
-    // (not instanceof Object).  TODO: test in this case that its prototype at
-    // least looks correct, even if we can't test that it's actually correct.
-    if (!this.has_extended_attribute("NoInterfaceObject")
-    && (typeof obj != expected_typeof || obj instanceof Object))
-    {
-        test(function()
-        {
-            assert_equals(exception, null, "Unexpected exception when evaluating object");
-            assert_equals(typeof obj, expected_typeof, "wrong typeof object");
-            assert_own_property(self, this.name,
-                                "self does not have own property " + format_value(this.name));
-            assert_own_property(self[this.name], "prototype",
-                                'interface "' + this.name + '" does not have own property "prototype"');
-
-            // "The value of the internal [[Prototype]] property of the
-            // platform object is the interface prototype object of the primary
-            // interface from the platform object’s associated global
-            // environment."
-            assert_equals(Object.getPrototypeOf(obj),
-                          self[this.name].prototype,
-                          desc + "'s prototype is not " + this.name + ".prototype");
-        }.bind(this), this.name + " must be primary interface of " + desc);
-    }
-
-    // "The class string of a platform object that implements one or more
-    // interfaces must be the identifier of the primary interface of the
-    // platform object."
-    test(function()
-    {
-        assert_equals(exception, null, "Unexpected exception when evaluating object");
-        assert_equals(typeof obj, expected_typeof, "wrong typeof object");
-        assert_class_string(obj, this.name, "class string of " + desc);
-        if (!this.has_stringifier())
-        {
-            assert_equals(String(obj), "[object " + this.name + "]", "String(" + desc + ")");
-        }
-    }.bind(this), "Stringification of " + desc);
-};
-
-//@}
-IdlInterface.prototype.test_interface_of = function(desc, obj, exception, expected_typeof)
-//@{
-{
-    // TODO: Indexed and named properties, more checks on interface members
-    this.already_tested = true;
-
-    for (var i = 0; i < this.members.length; i++)
-    {
-        var member = this.members[i];
-        if (member.type == "attribute" && member.isUnforgeable)
-        {
-            test(function()
-            {
-                assert_equals(exception, null, "Unexpected exception when evaluating object");
-                assert_equals(typeof obj, expected_typeof, "wrong typeof object");
-                this.do_interface_attribute_asserts(obj, member);
-            }.bind(this), this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
-        }
-        else if (member.type == "operation" &&
-                 member.name &&
-                 member.isUnforgeable)
-        {
-            var a_test = async_test(this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
-            a_test.step(function()
-            {
-                assert_equals(exception, null, "Unexpected exception when evaluating object");
-                assert_equals(typeof obj, expected_typeof, "wrong typeof object");
-                assert_own_property(obj, member.name,
-                                    "Doesn't have the unforgeable operation property");
-                this.do_member_operation_asserts(obj, member, a_test);
-            }.bind(this));
-        }
-        else if ((member.type == "const"
-        || member.type == "attribute"
-        || member.type == "operation")
-        && member.name)
-        {
-            test(function()
-            {
-                assert_equals(exception, null, "Unexpected exception when evaluating object");
-                assert_equals(typeof obj, expected_typeof, "wrong typeof object");
-                if (!member["static"]) {
-                    if (!this.is_global()) {
-                        assert_inherits(obj, member.name);
-                    } else {
-                        assert_own_property(obj, member.name);
-                    }
-
-                    if (member.type == "const")
-                    {
-                        assert_equals(obj[member.name], constValue(member.value));
-                    }
-                    if (member.type == "attribute")
-                    {
-                        // Attributes are accessor properties, so they might
-                        // legitimately throw an exception rather than returning
-                        // anything.
-                        var property, thrown = false;
-                        try
-                        {
-                            property = obj[member.name];
-                        }
-                        catch (e)
-                        {
-                            thrown = true;
-                        }
-                        if (!thrown)
-                        {
-                            this.array.assert_type_is(property, member.idlType);
-                        }
-                    }
-                    if (member.type == "operation")
-                    {
-                        assert_equals(typeof obj[member.name], "function");
-                    }
-                }
-            }.bind(this), this.name + " interface: " + desc + ' must inherit property "' + member.name + '" with the proper type (' + i + ')');
-        }
-        // TODO: This is wrong if there are multiple operations with the same
-        // identifier.
-        // TODO: Test passing arguments of the wrong type.
-        if (member.type == "operation" && member.name && member.arguments.length)
-        {
-            var a_test = async_test( this.name + " interface: calling " + member.name +
-            "(" + member.arguments.map(function(m) { return m.idlType.idlType; }) +
-            ") on " + desc + " with too few arguments must throw TypeError");
-            a_test.step(function()
-            {
-                assert_equals(exception, null, "Unexpected exception when evaluating object");
-                assert_equals(typeof obj, expected_typeof, "wrong typeof object");
-                if (!member["static"]) {
-                    if (!this.is_global() && !member.isUnforgeable) {
-                        assert_inherits(obj, member.name);
-                    } else {
-                        assert_own_property(obj, member.name);
-                    }
-                }
-                else
-                {
-                    assert_false(member.name in obj);
-                }
-
-                var minLength = minOverloadLength(this.members.filter(function(m) {
-                    return m.type == "operation" && m.name == member.name;
-                }));
-                var args = [];
-                var cb = awaitNCallbacks(minLength, a_test.done.bind(a_test));
-                for (var i = 0; i < minLength; i++) {
-                    throwOrReject(a_test, member, obj[member.name], obj, args,  "Called with " + i + " arguments", cb);
-
-                    args.push(create_suitable_object(member.arguments[i].idlType));
-                }
-                if (minLength === 0) {
-                    cb();
-                }
-            }.bind(this));
-        }
-    }
-};
-
-//@}
-IdlInterface.prototype.has_stringifier = function()
-//@{
-{
-    if (this.members.some(function(member) { return member.stringifier; })) {
-        return true;
-    }
-    if (this.base &&
-        this.array.members[this.base].has_stringifier()) {
-        return true;
-    }
-    return false;
-};
-
-//@}
-IdlInterface.prototype.do_interface_attribute_asserts = function(obj, member)
-//@{
-{
-    // This function tests WebIDL as of 2015-01-27.
-    // TODO: Consider [Exposed].
-
-    // This is called by test_member_attribute() with the prototype as obj if
-    // it is not a global, and the global otherwise, and by test_interface_of()
-    // with the object as obj.
-
-    // "For each exposed attribute of the interface, whether it was declared on
-    // the interface itself or one of its consequential interfaces, there MUST
-    // exist a corresponding property. The characteristics of this property are
-    // as follows:"
-
-    // "The name of the property is the identifier of the attribute."
-    assert_own_property(obj, member.name);
-
-    // "The property has attributes { [[Get]]: G, [[Set]]: S, [[Enumerable]]:
-    // true, [[Configurable]]: configurable }, where:
-    // "configurable is false if the attribute was declared with the
-    // [Unforgeable] extended attribute and true otherwise;
-    // "G is the attribute getter, defined below; and
-    // "S is the attribute setter, also defined below."
-    var desc = Object.getOwnPropertyDescriptor(obj, member.name);
-    assert_false("value" in desc, 'property descriptor has value but is supposed to be accessor');
-    assert_false("writable" in desc, 'property descriptor has "writable" field but is supposed to be accessor');
-    assert_true(desc.enumerable, "property is not enumerable");
-    if (member.isUnforgeable)
-    {
-        assert_false(desc.configurable, "[Unforgeable] property must not be configurable");
-    }
-    else
-    {
-        assert_true(desc.configurable, "property must be configurable");
-    }
-
-
-    // "The attribute getter is a Function object whose behavior when invoked
-    // is as follows:"
-    assert_equals(typeof desc.get, "function", "getter must be Function");
-
-    // "If the attribute is a regular attribute, then:"
-    if (!member["static"]) {
-        // "If O is not a platform object that implements I, then:
-        // "If the attribute was specified with the [LenientThis] extended
-        // attribute, then return undefined.
-        // "Otherwise, throw a TypeError."
-        if (!member.has_extended_attribute("LenientThis")) {
-            assert_throws(new TypeError(), function() {
-                desc.get.call({});
-            }.bind(this), "calling getter on wrong object type must throw TypeError");
-        } else {
-            assert_equals(desc.get.call({}), undefined,
-                          "calling getter on wrong object type must return undefined");
-        }
-    }
-
-    // "The value of the Function object’s “length” property is the Number
-    // value 0."
-    assert_equals(desc.get.length, 0, "getter length must be 0");
-
-
-    // TODO: Test calling setter on the interface prototype (should throw
-    // TypeError in most cases).
-    if (member.readonly
-    && !member.has_extended_attribute("PutForwards")
-    && !member.has_extended_attribute("Replaceable"))
-    {
-        // "The attribute setter is undefined if the attribute is declared
-        // readonly and has neither a [PutForwards] nor a [Replaceable]
-        // extended attribute declared on it."
-        assert_equals(desc.set, undefined, "setter must be undefined for readonly attributes");
-    }
-    else
-    {
-        // "Otherwise, it is a Function object whose behavior when
-        // invoked is as follows:"
-        assert_equals(typeof desc.set, "function", "setter must be function for PutForwards, Replaceable, or non-readonly attributes");
-
-        // "If the attribute is a regular attribute, then:"
-        if (!member["static"]) {
-            // "If /validThis/ is false and the attribute was not specified
-            // with the [LenientThis] extended attribute, then throw a
-            // TypeError."
-            // "If the attribute is declared with a [Replaceable] extended
-            // attribute, then: ..."
-            // "If validThis is false, then return."
-            if (!member.has_extended_attribute("LenientThis")) {
-                assert_throws(new TypeError(), function() {
-                    desc.set.call({});
-                }.bind(this), "calling setter on wrong object type must throw TypeError");
-            } else {
-                assert_equals(desc.set.call({}), undefined,
-                              "calling setter on wrong object type must return undefined");
-            }
-        }
-
-        // "The value of the Function object’s “length” property is the Number
-        // value 1."
-        assert_equals(desc.set.length, 1, "setter length must be 1");
-    }
-}
-//@}
-
-/// IdlInterfaceMember ///
-function IdlInterfaceMember(obj)
-//@{
-{
-    /**
-     * obj is an object produced by the WebIDLParser.js "ifMember" production.
-     * We just forward all properties to this object without modification,
-     * except for special extAttrs handling.
-     */
-    for (var k in obj)
-    {
-        this[k] = obj[k];
-    }
-    if (!("extAttrs" in this))
-    {
-        this.extAttrs = [];
-    }
-
-    this.isUnforgeable = this.has_extended_attribute("Unforgeable");
-}
-
-//@}
-IdlInterfaceMember.prototype = Object.create(IdlObject.prototype);
-
-/// Internal helper functions ///
-function create_suitable_object(type)
-//@{
-{
-    /**
-     * type is an object produced by the WebIDLParser.js "type" production.  We
-     * return a JavaScript value that matches the type, if we can figure out
-     * how.
-     */
-    if (type.nullable)
-    {
-        return null;
-    }
-    switch (type.idlType)
-    {
-        case "any":
-        case "boolean":
-            return true;
-
-        case "byte": case "octet": case "short": case "unsigned short":
-        case "long": case "unsigned long": case "long long":
-        case "unsigned long long": case "float": case "double":
-        case "unrestricted float": case "unrestricted double":
-            return 7;
-
-        case "DOMString":
-        case "ByteString":
-        case "USVString":
-            return "foo";
-
-        case "object":
-            return {a: "b"};
-
-        case "Node":
-            return document.createTextNode("abc");
-    }
-    return null;
-}
-//@}
-
-/// IdlEnum ///
-// Used for IdlArray.prototype.assert_type_is
-function IdlEnum(obj)
-//@{
-{
-    /**
-     * obj is an object produced by the WebIDLParser.js "dictionary"
-     * production.
-     */
-
-    /** Self-explanatory. */
-    this.name = obj.name;
-
-    /** An array of values produced by the "enum" production. */
-    this.values = obj.values;
-
-}
-//@}
-
-IdlEnum.prototype = Object.create(IdlObject.prototype);
-
-/// IdlTypedef ///
-// Used for IdlArray.prototype.assert_type_is
-function IdlTypedef(obj)
-//@{
-{
-    /**
-     * obj is an object produced by the WebIDLParser.js "typedef"
-     * production.
-     */
-
-    /** Self-explanatory. */
-    this.name = obj.name;
-
-    /** An array of values produced by the "typedef" production. */
-    this.values = obj.values;
-
-}
-//@}
-
-IdlTypedef.prototype = Object.create(IdlObject.prototype);
-
-}());
-// vim: set expandtab shiftwidth=4 tabstop=4 foldmarker=@{,@} foldmethod=marker: