diff --git a/test/language/subclassing/TypedArray/regular-subclassing.js b/test/language/subclassing/TypedArray/regular-subclassing.js new file mode 100644 index 0000000000000000000000000000000000000000..f1111e5e8ae86e209179b4a7fc65753a944c5e9c --- /dev/null +++ b/test/language/subclassing/TypedArray/regular-subclassing.js @@ -0,0 +1,35 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +es6id: 22.2.4 +description: Subclassing TypedArrays +info: > + 22.2.4 The TypedArray Constructors + + ... + + The TypedArray constructors are designed to be subclassable. They may be used + as the value of an extends clause of a class definition. Subclass constructors + that intend to inherit the specified TypedArray behaviour must include a super + call to the TypedArray constructor to create and initialize the subclass + instance with the internal state necessary to support the + %TypedArray%.prototype built-in methods. +---*/ + +[ + Int8Array, + Uint8Array, + Uint8ClampedArray, + Int16Array, + Uint16Array, + Int32Array, + Uint32Array, + Float32Array, + Float64Array +].forEach(function(Constructor) { + class Typed extends Constructor {} + + var arr = new Typed(2); + + assert.sameValue(arr.length, 2); +}); diff --git a/test/language/subclassing/TypedArray/super-must-be-called.js b/test/language/subclassing/TypedArray/super-must-be-called.js new file mode 100644 index 0000000000000000000000000000000000000000..912d9dc8deff88bc0f078b0fe34c0278ef631384 --- /dev/null +++ b/test/language/subclassing/TypedArray/super-must-be-called.js @@ -0,0 +1,45 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +es6id: 22.2.4 +description: Super need to be called to initialize internals +info: > + 22.2.4 The TypedArray Constructors + + ... + + The TypedArray constructors are designed to be subclassable. They may be used + as the value of an extends clause of a class definition. Subclass constructors + that intend to inherit the specified TypedArray behaviour must include a super + call to the TypedArray constructor to create and initialize the subclass + instance with the internal state necessary to support the + %TypedArray%.prototype built-in methods. +---*/ + +[ + Int8Array, + Uint8Array, + Uint8ClampedArray, + Int16Array, + Uint16Array, + Int32Array, + Uint32Array, + Float32Array, + Float64Array +].forEach(function(Constructor) { + class Typed extends Constructor { + constructor() {} + } + + assert.throws(ReferenceError, function() { + new Typed(); + }); + + class TypedWithSuper extends Constructor { + constructor() { + super(); + } + } + + new TypedWithSuper(); +});