diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/class/subclass/builtin-objects/Map/regular-subclassing.js')
-rw-r--r-- | js/src/tests/test262/language/statements/class/subclass/builtin-objects/Map/regular-subclassing.js | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/subclass/builtin-objects/Map/regular-subclassing.js b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/Map/regular-subclassing.js new file mode 100644 index 0000000000..755b2b1faa --- /dev/null +++ b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/Map/regular-subclassing.js @@ -0,0 +1,28 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +es6id: 23.1.1 +description: Subclassing the Map object +info: | + 23.1.1 The Map Constructor + + ... + + The Map constructor is designed to be subclassable. It may be used as the + value in an extends clause of a class definition. Subclass constructors that + intend to inherit the specified Map behaviour must include a super call to the + Map constructor to create and initialize the subclass instance with the + internal state necessary to support the Map.prototype built-in methods. +---*/ + +class M extends Map {} + +var map = new M([{ 'foo': 'bar' }]); + +assert.sameValue(map.size, 1); + +map.set('bar', 'baz'); + +assert.sameValue(map.size, 2); + +reportCompare(0, 0); |