Import JSC class tests

test/webkit/class-syntax-extends.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in the
+//     documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony-sloppy
+
+description('Tests for ES6 class syntax "extends"');
+
+class Base {
+    constructor() { }
+    baseMethod() { return 'base'; }
+    overridenMethod() { return 'base'; }
+    static staticBaseMethod() { return 'base'; }
+    static staticOverridenMethod() { return 'base'; }
+}
+
+class Derived extends Base {
+    constructor() { super(); }
+    overridenMethod() { return 'derived'; }
+    static staticOverridenMethod() { return 'derived'; }
+}
+
+shouldBeTrue('(new Base) instanceof Base');
+shouldBe('Object.getPrototypeOf(new Base)', 'Base.prototype');
+shouldBeTrue('(new Derived) instanceof Derived');
+shouldBe('Object.getPrototypeOf(new Derived)', 'Derived.prototype');
+shouldBe('Object.getPrototypeOf(Derived.prototype)', 'Base.prototype');
+shouldBe('(new Derived).baseMethod()', '"base"');
+shouldBe('(new Derived).overridenMethod()', '"derived"');
+shouldBe('Derived.staticBaseMethod()', '"base"');
+shouldBe('Derived.staticOverridenMethod()', '"derived"');
+
+shouldThrow('x = class extends', '"SyntaxError: Unexpected end of input"');
+shouldThrow('x = class extends', '"SyntaxError: Unexpected end of input"');
+shouldThrow('x = class extends Base {', '"SyntaxError: Unexpected end of input"');
+shouldNotThrow('x = class extends Base { }');
+shouldNotThrow('x = class extends Base { constructor() { } }');
+shouldBe('x.__proto__', 'Base');
+shouldBe('Object.getPrototypeOf(x)', 'Base');
+shouldBe('x.prototype.__proto__', 'Base.prototype');
+shouldBe('Object.getPrototypeOf(x.prototype)', 'Base.prototype');
+shouldBe('x = class extends null { constructor() { } }; x.__proto__', 'Function.prototype');
+shouldBe('x.__proto__', 'Function.prototype');
+shouldThrow('x = class extends 3 { constructor() { } }; x.__proto__', '"TypeError: Class extends value 3 is not a function or null"');
+shouldThrow('x = class extends "abc" { constructor() { } }; x.__proto__', '"TypeError: Class extends value abc is not a function or null"');
+shouldNotThrow('baseWithBadPrototype = function () {}; baseWithBadPrototype.prototype = 3; new baseWithBadPrototype');
+shouldThrow('x = class extends baseWithBadPrototype { constructor() { } }', '"TypeError: Class extends value does not have valid prototype property 3"');
+shouldNotThrow('baseWithBadPrototype.prototype = "abc"');
+shouldThrow('x = class extends baseWithBadPrototype { constructor() { } }', '"TypeError: Class extends value does not have valid prototype property abc"');
+shouldNotThrow('baseWithBadPrototype.prototype = null; x = class extends baseWithBadPrototype { constructor() { } }');
+
+shouldThrow('x = 1; c = class extends ++x { constructor() { } };');
+shouldThrow('x = 1; c = class extends x++ { constructor() { } };');
+shouldThrow('x = 1; c = class extends (++x) { constructor() { } };');
+shouldThrow('x = 1; c = class extends (x++) { constructor() { } };');
+shouldBe('x = 1; try { c = class extends (++x) { constructor() { } } } catch (e) { }; x', '2');
+shouldBe('x = 1; try { c = class extends (x++) { constructor() { } } } catch (e) { }; x', '2');
+
+shouldNotThrow('namespace = {}; namespace.A = class { }; namespace.B = class extends namespace.A { }');
+shouldNotThrow('namespace = {}; namespace.A = class A { }; namespace.B = class B extends namespace.A { }');
+shouldNotThrow('namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends namespace.A { constructor() { } }');
+shouldNotThrow('namespace = {}; namespace.A = class A { constructor() { } }; namespace.B = class B extends namespace.A { constructor() { } }');
+shouldNotThrow('namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends (namespace.A) { constructor() { } }');
+shouldNotThrow('namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends namespace["A"] { constructor() { } }');
+shouldNotThrow('namespace = {}; namespace.A = class { constructor() { } }; function getClassA() { return namespace.A }; namespace.B = class extends getClassA() { constructor() { } }');
+shouldNotThrow('namespace = {}; namespace.A = class { constructor() { } }; function getClass(prop) { return namespace[prop] }; namespace.B = class extends getClass("A") { constructor() { } }');
+shouldNotThrow('namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends (false||null||namespace.A) { constructor() { } }');
+shouldThrow('namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends false||null||namespace.A { constructor() { } }');
+shouldNotThrow('x = 1; namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends (x++, namespace.A) { constructor() { } };');
+shouldThrow('x = 1; namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends (namespace.A, x++) { constructor() { } };');
+shouldThrow('namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends new namespace.A { constructor() { } }');
+shouldThrow('namespace = {}; namespace.A = class { constructor() { } }; namespace.B = class extends new namespace.A() { constructor() { } }');
+shouldBe('x = 1; namespace = {}; namespace.A = class { constructor() { } }; try { namespace.B = class extends (x++, namespace.A) { constructor() { } } } catch (e) { } x', '2');
+shouldBe('x = 1; namespace = {}; namespace.A = class { constructor() { } }; try { namespace.B = class extends (namespace.A, x++) { constructor() { } } } catch (e) { } x', '2');
+
+shouldBe('Object.getPrototypeOf((class { constructor () { } }).prototype)', 'Object.prototype');
+shouldBe('Object.getPrototypeOf((class extends null { constructor () { super(); } }).prototype)', 'null');
+shouldThrow('new (class extends undefined { constructor () { this } })', '"TypeError: Class extends value undefined is not a function or null"');
+shouldThrow('new (class extends undefined { constructor () { super(); } })', '"TypeError: Class extends value undefined is not a function or null"');
+shouldThrow('x = {}; new (class extends undefined { constructor () { return x; } })', '"TypeError: Class extends value undefined is not a function or null"');
+shouldThrow('y = 12; new (class extends undefined { constructor () { return y; } })', '"TypeError: Class extends value undefined is not a function or null"');
+shouldBeTrue ('class x {}; new (class extends null { constructor () { return new x; } }) instanceof x');
+shouldThrow('new (class extends null { constructor () { this; } })', '"ReferenceError: this is not defined"');
+shouldThrow('new (class extends null { constructor () { super(); } })', '"TypeError: function () {} is not a constructor"');
+shouldBe('x = {}; new (class extends null { constructor () { return x } })', 'x');
+shouldThrow('y = 12; new (class extends null { constructor () { return y; } })', '"TypeError: Derived constructors may only return object or undefined"');
+shouldBeTrue ('class x {}; new (class extends null { constructor () { return new x; } }) instanceof x');
+shouldBe('x = null; Object.getPrototypeOf((class extends x { }).prototype)', 'null');
+shouldBeTrue('Object.prototype.isPrototypeOf(class { })');
+shouldBeTrue('Function.prototype.isPrototypeOf(class { })');
+
+var successfullyParsed = true;