Proxy: deleteProperty

test/built-ins/Proxy/deleteProperty/boolean-trap-result-boolean-false.js

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    The result is a Boolean value.
+features: [Reflect]
+---*/
+
+var target = {};
+var p = new Proxy(target, {
+    deleteProperty: function() {
+        return 0;
+    }
+});
+
+Object.defineProperties(target, {
+    isConfigurable: {
+        value: 1,
+        configurable: true
+    },
+    notConfigurable: {
+        value: 1,
+        configurable: false
+    }
+});
+
+assert.sameValue(Reflect.deleteProperty(p, "attr"), false);
+assert.sameValue(Reflect.deleteProperty(p, "isConfigurable"), false);
+assert.sameValue(Reflect.deleteProperty(p, "notConfigurable"), false);

test/built-ins/Proxy/deleteProperty/boolean-trap-result-boolean-true.js

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    The result is a Boolean value.
+---*/
+
+var p = new Proxy({}, {
+    deleteProperty: function() {
+        return 1;
+    }
+});
+
+assert.sameValue(Reflect.deleteProperty(p, "attr"), true);

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

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    9. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target, P»)).
+info: >
+    6.1.7.2 Object Internal Methods and Internal Slots
+
+    (...) Receiver is used as the this value when evaluating the code
+---*/
+
+var _handler, _target, _prop;
+var target = {
+    attr: 1
+};
+var handler = {
+    deleteProperty: function(t, prop) {
+        _handler = this;
+        _target = t;
+        _prop = prop;
+        return delete t[prop];
+    }
+};
+var p = new Proxy(target, handler);
+
+delete p.attr;
+
+assert.sameValue(_handler, handler, "handler object as the trap context");
+assert.sameValue(_target, target, "first argument is the target object");
+assert.sameValue(_prop, "attr", "second argument is the property name");

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

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    3. If handler is null, throw a TypeError exception.
+---*/
+
+var p = Proxy.revocable({
+    attr: 1
+}, {});
+
+p.revoke();
+
+assert.throws(TypeError, function() {
+    delete p.proxy.attr;
+});

test/built-ins/Proxy/deleteProperty/return-false-not-strict.js

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    11. If booleanTrapResult is false, return false.
+flags: [noStrict]
+---*/
+
+var p = new Proxy({}, {
+    deleteProperty: function() {
+        return false;
+    }
+});
+
+assert.sameValue(delete p.attr, false);

test/built-ins/Proxy/deleteProperty/return-false-strict.js

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    11. If booleanTrapResult is false, return false.
+flags: [onlyStrict]
+features: [Reflect]
+---*/
+
+var p = new Proxy({}, {
+    deleteProperty: function() {
+        return false;
+    }
+});
+
+assert.sameValue(Reflect.deleteProperty(p, "attr"), false);

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

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    Trap return is an abrupt.
+info: >
+    9. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target, P»)).
+    10. ReturnIfAbrupt(booleanTrapResult).
+includes: [Test262Error.js]
+---*/
+
+var p = new Proxy({}, {
+    deleteProperty: function(t, prop) {
+        throw new Test262Error();
+    }
+});
+
+assert.throws(Test262Error, function() {
+    delete p.attr;
+});

test/built-ins/Proxy/deleteProperty/targetdesc-is-not-configurable.js

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    A property cannot be reported as deleted, if it exists as a non-configurable
+    own property of the target object.
+info: >
+    14. If targetDesc.[[Configurable]] is false, throw a TypeError exception.
+---*/
+
+var target = {};
+var p = new Proxy(target, {
+    deleteProperty: function() {
+        return true;
+    }
+});
+
+Object.defineProperty(target, "attr", {
+    configurable: false,
+    value: 1
+});
+
+assert.throws(TypeError, function() {
+    delete p.attr;
+});

test/built-ins/Proxy/deleteProperty/targetdesc-is-undefined-return-true.js

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    14. If targetDesc is undefined, return true.
+---*/
+
+var p = new Proxy({}, {
+    deleteProperty: function() {
+        return true;
+    }
+});
+
+assert.sameValue(delete p.attr, true);

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

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    Throws when trap is not callable.
+info: >
+    9.5.10 [[Delete]] (P)
+
+    6. Let trap be GetMethod(handler, "deleteProperty").
+    ...
+
+    7.3.9 GetMethod (O, P)
+
+    5. If IsCallable(func) is false, throw a TypeError exception.
+---*/
+
+var p = new Proxy({}, {
+    deleteProperty: {}
+});
+
+assert.throws(TypeError, function() {
+    delete p.attr;
+});

test/built-ins/Proxy/deleteProperty/trap-is-undefined-not-strict.js

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    8. If trap is undefined, then Return target.[[Delete]](P).
+flags: [noStrict]
+---*/
+
+var target = {
+    attr: 1
+};
+var p = new Proxy(target, {});
+
+assert.sameValue(delete p.attr, true);
+assert.sameValue(delete p.notThere, true);
+assert.sameValue(
+    Object.getOwnPropertyDescriptor(target, "attr"),
+    undefined
+);
+
+Object.defineProperty(target, "attr", {
+    configurable: false,
+    enumerable: true,
+    value: 1
+});
+
+assert.sameValue(delete p.attr, false);

test/built-ins/Proxy/deleteProperty/trap-is-undefined-strict.js

+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.10
+description: >
+    [[Delete]] (P)
+
+    8. If trap is undefined, then Return target.[[Delete]](P).
+flags: [onlyStrict]
+features: [Reflect]
+---*/
+
+var target = {
+    attr: 1
+};
+var p = new Proxy(target, {});
+
+assert.sameValue(delete p.attr, true);
+assert.sameValue(delete p.notThere, true);
+assert.sameValue(
+    Object.getOwnPropertyDescriptor(target, "attr"),
+    undefined
+);
+
+Object.defineProperty(target, "attr", {
+    configurable: false,
+    enumerable: true,
+    value: 1
+});
+
+assert.sameValue(Reflect.deleteProperty(p, "attr"), false);