Add tests for DataView.prototype.byteOffset

test/built-ins/DataView/prototype/byteOffset/detached-buffer.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-get-dataview.prototype.byteoffset
+es6id: 24.2.4.3
+description: Throws a TypeError if the instance has a detached buffer
+info: |
+  24.2.4.3 get DataView.prototype.byteOffset
+
+  ...
+  5. Let buffer be the value of O's [[ViewedArrayBuffer]] internal slot.
+  6. If IsDetachedBuffer(buffer) is true, throw a TypeError exception.
+  ...
+includes: [detachArrayBuffer.js]
+---*/
+
+var buffer = new ArrayBuffer(1);
+var sample = new DataView(buffer, 0);
+
+$DETACHBUFFER(buffer);
+
+assert.throws(TypeError, function() {
+  sample.byteOffset;
+});

test/built-ins/DataView/prototype/byteOffset/invoked-as-accessor.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-get-dataview.prototype.byteoffset
+es6id: 24.2.4.3
+description: >
+  Requires this value to have a [[DataView]] internal slot
+info: |
+  24.2.4.3 get DataView.prototype.byteOffset
+
+  1. Let O be the this value.
+  2. If Type(O) is not Object, throw a TypeError exception.
+  3. If O does not have a [[DataView]] internal slot, throw a TypeError
+  exception.
+  ...
+---*/
+
+assert.throws(TypeError, function() {
+  DataView.prototype.byteOffset;
+});

test/built-ins/DataView/prototype/byteOffset/invoked-as-func.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-get-dataview.prototype.byteoffset
+es6id: 24.2.4.3
+description: Throws a TypeError exception when invoked as a function
+info: |
+  24.2.4.3 get DataView.prototype.byteOffset
+
+  1. Let O be the this value.
+  2. If Type(O) is not Object, throw a TypeError exception.
+  3. If O does not have a [[DataView]] internal slot, throw a TypeError
+  exception.
+  ...
+---*/
+
+var getter = Object.getOwnPropertyDescriptor(
+  DataView.prototype, 'byteOffset'
+).get;
+
+assert.throws(TypeError, function() {
+  getter();
+});

test/built-ins/DataView/prototype/byteOffset/prop-desc.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-get-dataview.prototype.byteoffset
+es6id: 24.2.4.3
+description: >
+  "byteOffset" property of DataView.prototype
+info: |
+  DataView.prototype.byteOffset is an accessor property whose set accessor
+  function is undefined.
+
+  Section 17: Every accessor property described in clauses 18 through 26 and in
+  Annex B.2 has the attributes {[[Enumerable]]: false, [[Configurable]]: true }
+includes: [propertyHelper.js]
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(DataView.prototype, "byteOffset");
+
+assert.sameValue(desc.set, undefined);
+assert.sameValue(typeof desc.get, "function");
+
+verifyNotEnumerable(DataView.prototype, "byteOffset");
+verifyConfigurable(DataView.prototype, "byteOffset");

test/built-ins/DataView/prototype/byteOffset/return-byteoffset.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-get-dataview.prototype.byteoffset
+es6id: 24.2.4.3
+description: >
+  Return value from [[ByteOffset]] internal slot
+info: |
+  24.2.4.3 get DataView.prototype.byteOffset
+
+  ...
+  7. Let offset be the value of O's [[ByteOffset]] internal slot.
+  8. Return offset.
+---*/
+
+var buffer = new ArrayBuffer(12);
+
+var sample1 = new DataView(buffer, 0);
+var sample2 = new DataView(buffer, 4);
+var sample3 = new DataView(buffer, 6, 4);
+var sample4 = new DataView(buffer, 12);
+var sample5 = new DataView(buffer, 0, 2);
+
+assert.sameValue(sample1.byteOffset, 0);
+assert.sameValue(sample2.byteOffset, 4);
+assert.sameValue(sample3.byteOffset, 6);
+assert.sameValue(sample4.byteOffset, 12);
+assert.sameValue(sample5.byteOffset, 0);

test/built-ins/DataView/prototype/byteOffset/this-has-no-dataview-internal.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-get-dataview.prototype.byteoffset
+description: >
+  Throws a TypeError exception when `this` does not have a [[DataView]] internal
+  slot
+info: |
+  24.2.4.3 get DataView.prototype.byteOffset
+
+  1. Let O be the this value.
+  2. If Type(O) is not Object, throw a TypeError exception.
+  3. If O does not have a [[DataView]] internal slot, throw a TypeError
+  exception.
+  ...
+features: [Int8Array]
+---*/
+
+var getter = Object.getOwnPropertyDescriptor(
+  DataView.prototype, "byteOffset"
+).get;
+
+assert.throws(TypeError, function() {
+  getter.call({});
+}, "{}");
+
+assert.throws(TypeError, function() {
+  getter.call([]);
+}, "[]");
+
+var ab = new ArrayBuffer(8);
+assert.throws(TypeError, function() {
+  getter.call(ab);
+}, "ArrayBuffer");
+
+var ta = new Int8Array();
+assert.throws(TypeError, function() {
+  getter.call(ta);
+}, "TypedArray");

test/built-ins/DataView/prototype/byteOffset/this-is-not-object.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-get-dataview.prototype.byteoffset
+es6id: 24.2.4.3
+description: Throws a TypeError exception when `this` is not Object
+info: |
+  24.2.4.3 get DataView.prototype.byteOffset
+
+  1. Let O be the this value.
+  2. If Type(O) is not Object, throw a TypeError exception.
+  ...
+features: [Symbol]
+---*/
+
+var getter = Object.getOwnPropertyDescriptor(
+  DataView.prototype, "byteOffset"
+).get;
+
+assert.throws(TypeError, function() {
+  getter.call(undefined);
+}, "this is undefined");
+
+assert.throws(TypeError, function() {
+  getter.call(null);
+}, "this is null");
+
+assert.throws(TypeError, function() {
+  getter.call(42);
+}, "this is 42");
+
+assert.throws(TypeError, function() {
+  getter.call("1");
+}, "this is a string");
+
+assert.throws(TypeError, function() {
+  getter.call(true);
+}, "this is true");
+
+assert.throws(TypeError, function() {
+  getter.call(false);
+}, "this is false");
+
+var s = Symbol("s");
+assert.throws(TypeError, function() {
+  getter.call(s);
+}, "this is a Symbol");