Map.prototype.delete

test/built-ins/Map/prototype/delete/context-is-not-map-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: 23.1.3.3
+description: >
+  Throws a TypeError if `this` does not have a [[MapData]] internal slot.
+info: >
+  Map.prototype.delete ( key )
+
+  1. Let M be the this value.
+  2. If Type(M) is not Object, throw a TypeError exception.
+  3. If M does not have a [[MapData]] internal slot, throw a TypeError
+  exception.
+  ...
+---*/
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call({}, 'attr');
+});
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call([], 'attr');
+});

test/built-ins/Map/prototype/delete/context-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: 23.1.3.3
+description: >
+  Throws a TypeError if `this` is not an Object.
+info: >
+  Map.prototype.delete ( 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() {
+  Map.prototype.delete.call(1, 'attr');
+});
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call(true, 'attr');
+});
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call('', 'attr');
+});
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call(null, 'attr');
+});
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call(undefined, 'attr');
+});
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call(Symbol(), 'attr');
+});

test/built-ins/Map/prototype/delete/context-is-set-object-throws.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: 23.1.3.3
+description: >
+  Throws a TypeError if `this` is a Set object.
+info: >
+  Map.prototype.delete ( key )
+
+  1. Let M be the this value.
+  2. If Type(M) is not Object, throw a TypeError exception.
+  3. If M does not have a [[MapData]] internal slot, throw a TypeError
+  exception.
+  ...
+features: [Set]
+---*/
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call(new Set(), 'attr');
+});

test/built-ins/Map/prototype/delete/context-is-weakmap-object-throws.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: 23.1.3.3
+description: >
+  Throws a TypeError if `this` is a WeakMap object.
+info: >
+  Map.prototype.delete ( key )
+
+  1. Let M be the this value.
+  2. If Type(M) is not Object, throw a TypeError exception.
+  3. If M does not have a [[MapData]] internal slot, throw a TypeError
+  exception.
+  ...
+features: [WeakMap]
+---*/
+
+assert.throws(TypeError, function() {
+  Map.prototype.delete.call(new WeakMap(), 'attr');
+});

test/built-ins/Map/prototype/delete/delete.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: 23.1.3.3
+description: >
+    Map.prototype.delete ( )
+
+    17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+    typeof Map.prototype.delete,
+    'function',
+    'typeof Map.prototype.delete is "function"'
+);
+
+verifyNotEnumerable(Map.prototype, 'delete');
+verifyWritable(Map.prototype, 'delete');
+verifyConfigurable(Map.prototype, 'delete');

test/built-ins/Map/prototype/delete/does-not-break-iterators.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: 23.1.3.3
+description: >
+  Deleting an entry does not break a [[MapData]] List.
+info: >
+  Map.prototype.delete ( key )
+
+  4. Let entries be the List that is the value of M’s [[MapData]] internal slot.
+  5. Repeat for each Record {[[key]], [[value]]} p that is an element of entries,
+    a. If p.[[key]] is not empty and SameValueZero(p.[[key]], key) is true, then
+      i. Set p.[[key]] to empty.
+      ii. Set p.[[value]] to empty.
+      iii. Return true.
+  ...
+---*/
+
+var m = new Map([['a',1], ['b', 2], ['c', 3]]);
+var e = m.entries();
+
+e.next();
+m.delete('b');
+
+var n = e.next();
+
+assert.sameValue(n.value[0], 'c');
+assert.sameValue(n.value[1], 3);
+
+n = e.next();
+assert.sameValue(n.value, undefined);
+assert.sameValue(n.done, true);

test/built-ins/Map/prototype/delete/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: 23.1.3.3
+description: >
+  Map.prototype.delete.length value and descriptor.
+info: >
+  Map.prototype.delete ( key )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Map.prototype.delete.length, 1,
+  'The value of `Map.prototype.delete.length` is `1`'
+);
+
+verifyNotEnumerable(Map.prototype.delete, 'length');
+verifyNotWritable(Map.prototype.delete, 'length');
+verifyConfigurable(Map.prototype.delete, 'length');

test/built-ins/Map/prototype/delete/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: 23.1.3.3
+description: >
+  Map.prototype.delete.name value and descriptor.
+info: >
+  Map.prototype.delete ( key )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Map.prototype.delete.name, 'delete',
+  'The value of `Map.prototype.delete.name` is `"delete"`'
+);
+
+verifyNotEnumerable(Map.prototype.delete, 'name');
+verifyNotWritable(Map.prototype.delete, 'name');
+verifyConfigurable(Map.prototype.delete, 'name');

test/built-ins/Map/prototype/delete/returns-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: 23.1.3.3
+description: >
+  Returns false when it does not delete an entry.
+info: >
+  Map.prototype.delete ( key )
+
+  4. Let entries be the List that is the value of M’s [[MapData]] internal slot.
+  5. Repeat for each Record {[[key]], [[value]]} p that is an element of entries,
+    a. If p.[[key]] is not empty and SameValueZero(p.[[key]], key) is true, then
+      ...
+      iii. Return true.
+  6. Return false.
+---*/
+
+var m = new Map([['a',1], ['b', 2]]);
+
+assert.sameValue(m.delete('not-in-the-map'), false);
+
+m.delete('a');
+assert.sameValue(m.delete('a'), false);

test/built-ins/Map/prototype/delete/returns-true-for-deleted-entry.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: 23.1.3.3
+description: >
+  Returns true when deletes an entry.
+info: >
+  Map.prototype.delete ( key )
+
+  4. Let entries be the List that is the value of M’s [[MapData]] internal slot.
+  5. Repeat for each Record {[[key]], [[value]]} p that is an element of entries,
+    a. If p.[[key]] is not empty and SameValueZero(p.[[key]], key) is true, then
+      i. Set p.[[key]] to empty.
+      ii. Set p.[[value]] to empty.
+      iii. Return true.
+  ...
+---*/
+
+var m = new Map([['a',1], ['b', 2]]);
+
+var result = m.delete('a');
+
+assert(result);
+assert.sameValue(m.size, 1);