Add tests for Reflect.preventExtensions

test/built-ins/Reflect/preventExtensions/always-return-true-from-ordinary-object.js

@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.12
+description: >
+  Always returns true when target is an ordinary object.
+info: >
+  26.1.12 Reflect.preventExtensions ( target )
+
+  ...
+  2. Return target.[[PreventExtensions]]().
+
+  9.1.4 [[PreventExtensions]] ( )
+
+  1. Set the value of the [[Extensible]] internal slot of O to false.
+  2. Return true.
+---*/
+
+var o = {};
+assert.sameValue(
+  Reflect.preventExtensions(o), true,
+  'returns true after preventing extentions on an object'
+);
+assert.sameValue(
+  Reflect.preventExtensions(o), true,
+  'returns true even if the object already prevents extentions'
+);

test/built-ins/Reflect/preventExtensions/length.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.12
+description: >
+  Reflect.preventExtensions.length value and property descriptor
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Reflect.preventExtensions.length, 1,
+  'The value of `Reflect.preventExtensions.length` is `1`'
+);
+
+verifyNotEnumerable(Reflect.preventExtensions, 'length');
+verifyNotWritable(Reflect.preventExtensions, 'length');
+verifyConfigurable(Reflect.preventExtensions, 'length');

test/built-ins/Reflect/preventExtensions/name.js

@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.12
+description: >
+  Reflect.preventExtensions.name value and property descriptor
+info: >
+  26.1.12 Reflect.preventExtensions ( target )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Reflect.preventExtensions.name, 'preventExtensions',
+  'The value of `Reflect.preventExtensions.name` is `"preventExtensions"`'
+);
+
+verifyNotEnumerable(Reflect.preventExtensions, 'name');
+verifyNotWritable(Reflect.preventExtensions, 'name');
+verifyConfigurable(Reflect.preventExtensions, 'name');

test/built-ins/Reflect/preventExtensions/prevent-extensions.js

@@ -0,0 +1,34 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.12
+description: >
+  Prevent extentions on target.
+info: >
+  26.1.12 Reflect.preventExtensions ( target )
+
+  ...
+  2. Return target.[[PreventExtensions]]().
+
+  9.1.4 [[PreventExtensions]] ( )
+
+  1. Set the value of the [[Extensible]] internal slot of O to false.
+  ...
+---*/
+
+var o = {};
+Reflect.preventExtensions(o);
+assert.sameValue(Object.isExtensible(o), false, 'object is not extensible');
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, 'y', {});
+});
+assert.throws(TypeError, function() {
+  Object.setPrototypeOf(o, Array.prototype);
+});
+
+Reflect.preventExtensions(o);
+assert.sameValue(
+  Object.isExtensible(o), false,
+  'object is still not extensible on exhausted calls'
+);

test/built-ins/Reflect/preventExtensions/preventExtensions.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.12
+description: >
+  Reflect.preventExtensions is configurable, writable and not enumerable.
+info: >
+  26.1.12 Reflect.preventExtensions ( target )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+verifyNotEnumerable(Reflect, 'preventExtensions');
+verifyWritable(Reflect, 'preventExtensions');
+verifyConfigurable(Reflect, 'preventExtensions');

test/built-ins/Reflect/preventExtensions/return-abrupt-from-result.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.12
+description: >
+  Return abrupt result.
+info: >
+  26.1.12 Reflect.preventExtensions ( target )
+
+  ...
+  2. Return target.[[PreventExtensions]]().
+features: [Proxy]
+---*/
+
+var o1 = {};
+var p = new Proxy(o1, {
+  preventExtensions: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  Reflect.preventExtensions(p);
+});

test/built-ins/Reflect/preventExtensions/return-boolean-from-proxy-object.js

@@ -0,0 +1,46 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.12
+description: >
+  Returns boolean from Proxy object.
+info: >
+  26.1.12 Reflect.preventExtensions ( target )
+
+  ...
+  2. Return target.[[PreventExtensions]]().
+
+  9.5.4 [[PreventExtensions]] ( )
+
+  8. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target»)).
+  9. ReturnIfAbrupt(booleanTrapResult).
+  10. If booleanTrapResult is true, then
+    a. Let targetIsExtensible be target.[[IsExtensible]]().
+    b. ReturnIfAbrupt(targetIsExtensible).
+    c. If targetIsExtensible is true, throw a TypeError exception.
+  11. Return booleanTrapResult.
+features: [Proxy]
+---*/
+
+var p1 = new Proxy({}, {
+  preventExtensions: function() {
+    return false;
+  }
+});
+
+assert.sameValue(
+  Reflect.preventExtensions(p1), false,
+  'returns false from Proxy handler'
+);
+
+var p2 = new Proxy({}, {
+  preventExtensions: function(target) {
+    Object.preventExtensions(target);
+    return true;
+  }
+});
+
+assert.sameValue(
+  Reflect.preventExtensions(p2), true,
+  'returns true from Proxy handler'
+);

test/built-ins/Reflect/preventExtensions/target-is-not-object-throws.js

@@ -0,0 +1,28 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.10
+description: >
+  Throws a TypeError if target is not an Object.
+info: >
+  26.1.10 Reflect.isExtensible (target)
+
+  1. If Type(target) is not Object, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, function() {
+  Reflect.isExtensible(1);
+});
+
+assert.throws(TypeError, function() {
+  Reflect.isExtensible(null);
+});
+
+assert.throws(TypeError, function() {
+  Reflect.isExtensible(undefined);
+});
+
+assert.throws(TypeError, function() {
+  Reflect.isExtensible('');
+});

test/built-ins/Reflect/preventExtensions/target-is-symbol-throws.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 26.1.10
+description: >
+  Throws a TypeError if target is a Symbol
+info: >
+  26.1.10 Reflect.isExtensible (target)
+
+  1. If Type(target) is not Object, throw a TypeError exception.
+  ...
+features: [Symbol]
+---*/
+
+assert.throws(TypeError, function() {
+  Reflect.isExtensible(Symbol(1));
+});