WeakMap.prototype.get

test/built-ins/WeakMap/prototype/get/does-not-have-weakmapdata-internal-slot-map.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: 23.3.3.3
+description: >
+  Throws a TypeError if `this` is a Map object.
+info: >
+  WeakMap.prototype.get ( key )
+
+  ...
+  3. If M does not have a [[WeakMapData]] internal slot, throw a TypeError
+  exception.
+  ...
+features: [Map]
+---*/
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call(new Map(), 1);
+});
+
+assert.throws(TypeError, function() {
+  var map = new WeakMap();
+  map.get.call(new Map(), 1);
+});

test/built-ins/WeakMap/prototype/get/does-not-have-weakmapdata-internal-slot-set.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: 23.3.3.3
+description: >
+  Throws a TypeError if `this` is a Set object.
+info: >
+  WeakMap.prototype.get ( key )
+
+  ...
+  3. If M does not have a [[WeakMapData]] internal slot, throw a TypeError
+  exception.
+  ...
+features: [Set]
+---*/
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call(new Set(), 1);
+});
+
+assert.throws(TypeError, function() {
+  var map = new WeakMap();
+  map.get.call(new Set(), 1);
+});

test/built-ins/WeakMap/prototype/get/does-not-have-weakmapdata-internal-slot.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: 23.3.3.3
+description: >
+  Throws a TypeError if `this` does not have a [[WeakMapData]] internal slot.
+info: >
+  WeakMap.prototype.get ( key )
+
+  ...
+  3. If M does not have a [[WeakMapData]] internal slot, throw a TypeError
+  exception.
+  ...
+---*/
+var map = new WeakMap();
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call([], 1);
+});
+
+assert.throws(TypeError, function() {
+  map.get.call([], 1);
+});
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call({}, 1);
+});
+
+assert.throws(TypeError, function() {
+  map.get.call({}, 1);
+});

test/built-ins/WeakMap/prototype/get/get.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: 23.3.3.3
+description: >
+  Property type and descriptor.
+info: >
+  WeakMap.prototype.get ( key )
+
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  typeof WeakMap.prototype.get,
+  'function',
+  '`typeof WeakMap.prototype.get` is `function`'
+);
+
+verifyNotEnumerable(WeakMap.prototype, 'get');
+verifyWritable(WeakMap.prototype, 'get');
+verifyConfigurable(WeakMap.prototype, 'get');

test/built-ins/WeakMap/prototype/get/length.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: 23.3.3.3
+description: >
+  WeakMap.prototype.get.length value and descriptor.
+info: >
+  WeakMap.prototype.get ( key )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  WeakMap.prototype.get.length, 1,
+  'The value of `WeakMap.prototype.get.length` is `1`'
+);
+
+verifyNotEnumerable(WeakMap.prototype.get, 'length');
+verifyNotWritable(WeakMap.prototype.get, 'length');
+verifyConfigurable(WeakMap.prototype.get, 'length');

test/built-ins/WeakMap/prototype/get/name.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: 23.3.3.3
+description: >
+  WeakMap.prototype.get.name value and descriptor.
+info: >
+  WeakMap.prototype.get ( key )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  WeakMap.prototype.get.name, 'get',
+  'The value of `WeakMap.prototype.get.name` is `"get"`'
+);
+
+verifyNotEnumerable(WeakMap.prototype.get, 'name');
+verifyNotWritable(WeakMap.prototype.get, 'name');
+verifyConfigurable(WeakMap.prototype.get, 'name');

test/built-ins/WeakMap/prototype/get/returns-undefined-key-is-not-object.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: 23.3.3.3
+description: >
+  Returns undefined when key is not an Object.
+info: >
+  WeakMap.prototype.get ( key )
+
+  ...
+  4. Let entries be the List that is the value of M’s [[WeakMapData]] internal
+  slot.
+  5. If Type(key) is not Object, return undefined.
+  ...
+---*/
+
+var map = new WeakMap();
+
+assert.sameValue(map.get(null), undefined, 'Returns undefined if key is null');
+
+assert.sameValue(map.get(NaN), undefined, 'Returns undefined if key is NaN');
+
+assert.sameValue(
+  map.get('foo'), undefined,
+  'Returns undefined if key is a String'
+);
+
+assert.sameValue(
+  map.get(1), undefined,
+  'Returns undefined if key is a Number'
+);
+
+assert.sameValue(
+  map.get(undefined), undefined,
+  'Returns undefined if key is undefined'
+);
+
+assert.sameValue(
+  map.get(Symbol()), undefined,
+  'Returns undefined if key is a Symbol'
+);

test/built-ins/WeakMap/prototype/get/returns-undefined.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: 23.3.3.3
+description: >
+  Returns undefined when key is not on the WeakMap object.
+info: >
+  WeakMap.prototype.get ( key )
+
+  4. Let entries be the List that is the value of M’s [[WeakMapData]] internal
+  slot.
+  5. If Type(key) is not Object, return undefined.
+  6. Repeat for each Record {[[key]], [[value]]} p that is an element of
+  entries,
+    a. If p.[[key]] is not empty and SameValue(p.[[key]], key) is true, return
+    p.[[value]].
+  7. Return undefined.
+  ...
+---*/
+
+var map = new WeakMap();
+var key = {};
+
+assert.sameValue(
+  map.get(key), undefined,
+ 'returns undefined if key is not on the weakmap'
+);
+
+map.set(key, 1);
+map.set({}, 2);
+map.delete(key);
+map.set({}, 3);
+
+assert.sameValue(
+  map.get(key), undefined,
+  'returns undefined if key was deleted'
+);

test/built-ins/WeakMap/prototype/get/returns-value.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: 23.3.3.3
+description: >
+  Returns the value from the specified key
+info: >
+  WeakMap.prototype.get ( key )
+
+  4. Let entries be the List that is the value of M’s [[WeakMapData]] internal
+  slot.
+  5. If Type(key) is not Object, return undefined.
+  6. Repeat for each Record {[[key]], [[value]]} p that is an element of
+  entries,
+    a. If p.[[key]] is not empty and SameValue(p.[[key]], key) is true, return
+    p.[[value]].
+  ...
+---*/
+
+var foo = {};
+var bar = {};
+var baz = [];
+var map = new WeakMap([[foo,0]]);
+
+assert.sameValue(map.get(foo), 0);
+
+map.set(bar, 1);
+assert.sameValue(map.get(bar), 1);
+
+map.set(baz, 2);
+assert.sameValue(map.get(baz), 2);

test/built-ins/WeakMap/prototype/get/this-not-object-throw.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: 23.3.3.3
+description: >
+  Throws a TypeError if `this` value is not an Object.
+info: >
+  WeakMap.prototype.get ( key )
+
+  1. Let M be the this value.
+  2. If Type(M) is not Object, throw a TypeError exception.
+  ...
+features: [Symbol]
+---*/
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call(false, {});
+});
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call(1, {});
+});
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call('', {});
+});
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call(undefined, {});
+});
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call(null, {});
+});
+
+assert.throws(TypeError, function() {
+  WeakMap.prototype.get.call(Symbol(), {});
+});
+
+assert.throws(TypeError, function() {
+  var map = new WeakMap();
+  map.get.call(false, {});
+});