Import intl test suite from v8-i18n project

test/intl/assert.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * 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.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+// OWNER OR 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.
+// limitations under the License.
+
+// Some methods are taken from v8/test/mjsunit/mjsunit.js
+
+/**
+ * Compares two objects for key/value equality.
+ * Returns true if they are equal, false otherwise.
+ */
+function deepObjectEquals(a, b) {
+  var aProps = Object.keys(a);
+  aProps.sort();
+  var bProps = Object.keys(b);
+  bProps.sort();
+  if (!deepEquals(aProps, bProps)) {
+    return false;
+  }
+  for (var i = 0; i < aProps.length; i++) {
+    if (!deepEquals(a[aProps[i]], b[aProps[i]])) {
+      return false;
+    }
+  }
+  return true;
+}
+
+
+/**
+ * Compares two JavaScript values for type and value equality.
+ * It checks internals of arrays and objects.
+ */
+function deepEquals(a, b) {
+  if (a === b) {
+    // Check for -0.
+    if (a === 0) return (1 / a) === (1 / b);
+    return true;
+  }
+  if (typeof a != typeof b) return false;
+  if (typeof a == 'number') return isNaN(a) && isNaN(b);
+  if (typeof a !== 'object' && typeof a !== 'function') return false;
+  // Neither a nor b is primitive.
+  var objectClass = classOf(a);
+  if (objectClass !== classOf(b)) return false;
+  if (objectClass === 'RegExp') {
+    // For RegExp, just compare pattern and flags using its toString.
+    return (a.toString() === b.toString());
+  }
+  // Functions are only identical to themselves.
+  if (objectClass === 'Function') return false;
+  if (objectClass === 'Array') {
+    var elementCount = 0;
+    if (a.length != b.length) {
+      return false;
+    }
+    for (var i = 0; i < a.length; i++) {
+      if (!deepEquals(a[i], b[i])) return false;
+    }
+    return true;
+  }
+  if (objectClass == 'String' || objectClass == 'Number' ||
+      objectClass == 'Boolean' || objectClass == 'Date') {
+    if (a.valueOf() !== b.valueOf()) return false;
+  }
+  return deepObjectEquals(a, b);
+}
+
+
+/**
+ * Throws an exception, and prints the values in case of error.
+ */
+function fail(expected, found) {
+  // TODO(cira): Replace String with PrettyPrint for objects and arrays.
+  var message = 'Failure: expected <' + String(expected) + '>, found <' +
+      String(found) + '>.';
+  throw new Error(message);
+}
+
+
+/**
+ * Throws if two variables have different types or values.
+ */
+function assertEquals(expected, found) {
+  if (!deepEquals(expected, found)) {
+    fail(expected, found);
+  }
+}
+
+
+/**
+ * Throws if value is false.
+ */
+function assertTrue(value) {
+  assertEquals(true, value)
+}
+
+
+/**
+ * Throws if value is true.
+ */
+function assertFalse(value) {
+  assertEquals(false, value);
+}
+
+
+/**
+ * Returns true if code throws specified exception.
+ */
+function assertThrows(code, type_opt, cause_opt) {
+  var threwException = true;
+  try {
+    if (typeof code == 'function') {
+      code();
+    } else {
+      eval(code);
+    }
+    threwException = false;
+  } catch (e) {
+    if (typeof type_opt == 'function') {
+      assertInstanceof(e, type_opt);
+    }
+    if (arguments.length >= 3) {
+      assertEquals(e.type, cause_opt);
+    }
+    // Success.
+    return;
+  }
+  throw new Error("Did not throw exception");
+}
+
+
+/**
+ * Throws an exception if code throws.
+ */
+function assertDoesNotThrow(code, name_opt) {
+  try {
+    if (typeof code == 'function') {
+      code();
+    } else {
+      eval(code);
+    }
+  } catch (e) {
+    fail("threw an exception: ", e.message || e, name_opt);
+  }
+}
+
+
+/**
+ * Throws if obj is not of given type.
+ */
+function assertInstanceof(obj, type) {
+  if (!(obj instanceof type)) {
+    var actualTypeName = null;
+    var actualConstructor = Object.prototypeOf(obj).constructor;
+    if (typeof actualConstructor == "function") {
+      actualTypeName = actualConstructor.name || String(actualConstructor);
+    }
+    throw new Error('Object <' + obj + '> is not an instance of <' +
+         (type.name || type) + '>' +
+         (actualTypeName ? ' but of < ' + actualTypeName + '>' : ''));
+  }
+}