Proxy: preventExtensions

test/built-ins/Proxy/preventExtensions/call-parameters.js

@@ -0,0 +1,31 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.4
+description: >
+    Trap is called with handler on its context and target as the first
+    parameter.
+info: >
+    [[PreventExtensions]] ( )
+
+    ...
+    8. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target»)).
+    ...
+---*/
+
+var _target, _handler;
+var target = {};
+var handler = {
+    preventExtensions: function(t) {
+        _handler = this;
+        _target = t;
+
+        return Object.preventExtensions(target);
+    }
+};
+var p = new Proxy(target, handler);
+
+Object.preventExtensions(p);
+
+assert.sameValue(_handler, handler);
+assert.sameValue(_target, target);

test/built-ins/Proxy/preventExtensions/null-handler.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.4
+description: >
+    Throws a TypeError exception if handler is null.
+---*/
+
+var p = Proxy.revocable({}, {});
+
+p.revoke();
+
+assert.throws(TypeError, function() {
+    Object.preventExtensions(p.proxy);
+});

test/built-ins/Proxy/preventExtensions/return-false.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.4
+description: >
+    If boolean trap result if false, return false.
+features: [Reflect]
+---*/
+
+var target = {};
+var p = new Proxy({}, {
+    preventExtensions: function(t) {
+        return 0;
+    }
+});
+
+assert.sameValue(Reflect.preventExtensions(p), false);
+
+Object.preventExtensions(target);
+
+assert.sameValue(Reflect.preventExtensions(p), false);

test/built-ins/Proxy/preventExtensions/return-is-abrupt.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.4
+description: >
+    Trap returns abrupt.
+info: >
+    [[PreventExtensions]] ( )
+
+    ...
+    8. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target»)).
+    9. ReturnIfAbrupt(booleanTrapResult).
+    ...
+includes: [Test262Error.js]
+---*/
+
+var p = new Proxy({}, {
+    preventExtensions: function(t) {
+        throw new Test262Error();
+    }
+});
+
+assert.throws(Test262Error, function() {
+    Object.preventExtensions(p);
+});

test/built-ins/Proxy/preventExtensions/return-true-target-is-extensible.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: 9.5.4
+description: >
+    Throws a TypeError exception if boolean trap result is true and target is
+    extensible.
+info: >
+    [[PreventExtensions]] ( )
+
+    ...
+    10. If booleanTrapResult is true, then
+        ...
+        c. If targetIsExtensible is true, throw a TypeError exception.
+    11. Return booleanTrapResult.
+    ...
+---*/
+
+var p = new Proxy({}, {
+    preventExtensions: function(t) {
+        return true;
+    }
+});
+
+assert.throws(TypeError, function() {
+    Object.preventExtensions(p);
+});

test/built-ins/Proxy/preventExtensions/return-true-target-is-not-extensible.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.4
+description: >
+    Return boolean trap result if its true and target is not extensible.
+features: [Reflect]
+---*/
+
+var target = {};
+var p = new Proxy(target, {
+    preventExtensions: function(t) {
+        return 1;
+    }
+});
+
+Object.preventExtensions(target);
+
+assert(Reflect.preventExtensions(p));

test/built-ins/Proxy/preventExtensions/trap-is-not-callable.js

@@ -0,0 +1,29 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.4
+description: >
+    Throws a TypeError exception if trap is not callable.
+info: >
+    [[PreventExtensions]] ( )
+
+    ...
+    1. Let handler be the value of the [[ProxyHandler]] internal slot of O.
+    ...
+    5. Let trap be GetMethod(handler, "preventExtensions").
+    ...
+        7.3.9 GetMethod (O, P)
+        ...
+        2. Let func be GetV(O, P).
+        5. If IsCallable(func) is false, throw a TypeError exception.
+        ...
+---*/
+
+var target = {};
+var p = new Proxy(target, {
+    preventExtensions: {}
+});
+
+assert.throws(TypeError, function() {
+    Object.preventExtensions(p);
+});

test/built-ins/Proxy/preventExtensions/trap-is-undefined.js

@@ -0,0 +1,13 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.4
+description: >
+    Return target.[[PreventExtensions]]() if target is undefined.
+features: [Reflect]
+---*/
+
+var target = {};
+var p = new Proxy(target, {});
+
+assert.sameValue(Reflect.preventExtensions(p), true);