Merge pull request #380 from bocoup/String.prototype.endsWith

Add and update tests for String.prototype.endsWith

test/built-ins/String/prototype/endsWith/coerced-values-of-position.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: 21.1.3.6
+description: >
+  Returns based on coerced values of endPosition.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  12. Let end be min(max(pos, 0), len).
+  13. Let searchLength be the number of elements in searchStr.
+  14. Let start be end - searchLength.
+  15. If start is less than 0, return false.
+  16. If the sequence of elements of S starting at start of length searchLength
+  is the same as the full element sequence of searchStr, return true.
+  17. Otherwise, return false.
+  ...
+---*/
+
+var str = 'The future is cool!';
+
+assert(str.endsWith('', NaN), 'NaN coerced to 0');
+assert(str.endsWith('', null), 'null coerced to 0');
+assert(str.endsWith('', false), 'false coerced to 0');
+assert(str.endsWith('', ''), '"" coerced to 0');
+assert(str.endsWith('', '0'), '"0" coerced to 0');
+assert(str.endsWith('', undefined), 'undefined coerced to 0');
+
+assert(str.endsWith('The future', 10.4), '10.4 coerced to 10');
+assert(str.endsWith('T', true), 'true coerced to 1');
+
+assert(str.endsWith('The future', '10'), '"10" coerced to 10');

test/built-ins/String/prototype/endsWith/endsWith.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: 21.1.3.6
+description: >
+  Property type and descriptor.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  typeof String.prototype.endsWith,
+  'function',
+  '`typeof String.prototype.endsWith` is `function`'
+);
+
+verifyNotEnumerable(String.prototype, 'endsWith');
+verifyWritable(String.prototype, 'endsWith');
+verifyConfigurable(String.prototype, 'endsWith');

test/built-ins/String/prototype/endsWith/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: 21.1.3.6
+description: >
+  String.prototype.endsWith.length value and descriptor.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  The length property of the endsWith method is 1.
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  String.prototype.endsWith.length, 1,
+  'The value of `String.prototype.endsWith.length` is `1`'
+);
+
+verifyNotEnumerable(String.prototype.endsWith, 'length');
+verifyNotWritable(String.prototype.endsWith, 'length');
+verifyConfigurable(String.prototype.endsWith, 'length');

test/built-ins/String/prototype/endsWith/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: 21.1.3.6
+description: >
+  String.prototype.endsWith.name value and descriptor.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  String.prototype.endsWith.name, 'endsWith',
+  'The value of `String.prototype.endsWith.name` is `"endsWith"`'
+);
+
+verifyNotEnumerable(String.prototype.endsWith, 'name');
+verifyNotWritable(String.prototype.endsWith, 'name');
+verifyConfigurable(String.prototype.endsWith, 'name');

test/built-ins/String/prototype/endsWith/return-abrupt-from-position-as-symbol.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: 21.1.3.6
+description: >
+  Returns abrupt from ToInteger(endPosition) as a Symbol.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  ...
+features: [Symbol]
+---*/
+
+var position = Symbol();
+
+assert.throws(TypeError, function() {
+  ''.endsWith('', position);
+});

test/built-ins/String/prototype/endsWith/return-abrupt-from-position.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: 21.1.3.6
+description: >
+  Returns abrupt from ToInteger(endPosition).
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  ...
+---*/
+
+var position = {
+  valueOf: function() {
+    throw new Test262Error();
+  }
+};
+
+assert.throws(Test262Error, function() {
+  ''.endsWith('', position);
+});

test/built-ins/String/prototype/endsWith/return-abrupt-from-searchstring-as-symbol.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: 21.1.3.6
+description: >
+  Returns abrupt from ToString(searchString) as a Symbol
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  7. Let searchStr be ToString(searchString).
+  8. ReturnIfAbrupt(searchStr).
+  ...
+features: [Symbol]
+---*/
+
+var s = Symbol();
+
+assert.throws(TypeError, function() {
+  ''.endsWith(s);
+});

test/built-ins/String/prototype/endsWith/return-abrupt-from-searchstring-regexp-test.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: 21.1.3.6
+description: >
+  Returns abrupt from IsRegExp(searchString).
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  4. Let isRegExp be IsRegExp(searchString).
+  5. ReturnIfAbrupt(isRegExp).
+  ...
+
+  7.2.8 IsRegExp ( argument )
+
+  2. Let isRegExp be Get(argument, @@match).
+  3. ReturnIfAbrupt(isRegExp).
+features: [Symbol.match]
+---*/
+
+var obj = {};
+Object.defineProperty(obj, Symbol.match, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  ''.endsWith(obj);
+});
+
+var regexp = /./;
+Object.defineProperty(regexp, Symbol.match, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  ''.endsWith(regexp);
+});

test/built-ins/String/prototype/endsWith/return-abrupt-from-searchstring.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: 21.1.3.6
+description: >
+  Returns abrupt from ToString(searchString)
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  7. Let searchStr be ToString(searchString).
+  8. ReturnIfAbrupt(searchStr).
+  ...
+---*/
+
+var obj = {
+  toString: function() {
+    throw new Test262Error();
+  }
+};
+
+assert.throws(Test262Error, function() {
+  ''.endsWith(obj);
+});

test/built-ins/String/prototype/endsWith/return-abrupt-from-this-as-symbol.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: 21.1.3.6
+description: >
+  Returns abrupt from ToString(this) where this is a Symbol
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  1. Let O be RequireObjectCoercible(this value).
+  2. Let S be ToString(O).
+  3. ReturnIfAbrupt(S).
+  ...
+features: [Symbol]
+---*/
+
+var s = Symbol('');
+
+assert.throws(TypeError, function() {
+  String.prototype.endsWith.call(s, '');
+});

test/built-ins/String/prototype/endsWith/return-abrupt-from-this.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: 21.1.3.6
+description: >
+  Returns abrupt from ToString(this)
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  1. Let O be RequireObjectCoercible(this value).
+  2. Let S be ToString(O).
+  3. ReturnIfAbrupt(S).
+---*/
+
+var o = {
+  toString: function() {
+    throw new Test262Error();
+  }
+};
+
+assert.throws(Test262Error, function() {
+  String.prototype.endsWith.call(o, '');
+});

test/built-ins/String/prototype/endsWith/return-false-if-search-start-is-less-than-zero.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: 21.1.3.6
+description: >
+  Returns false if search start is less than 0.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  9. Let len be the number of elements in S.
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  12. Let end be min(max(pos, 0), len).
+  13. Let searchLength be the number of elements in searchStr.
+  14. Let start be end - searchLength.
+  15. If start is less than 0, return false.
+  ...
+
+  Note: (min(max(pos, 0), len) - searchString.length) < 0;
+---*/
+
+assert.sameValue(
+  'web'.endsWith('w', 0), false,
+  '"web".endsWith("w", 0) returns false'
+);
+
+assert.sameValue(
+  'Bob'.endsWith('  Bob'), false,
+  '"Bob".endsWith("  Bob") returns false'
+);

test/built-ins/String/prototype/endsWith/return-true-if-searchstring-is-empty.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: 21.1.3.6
+description: >
+  Returns true if searchString.length == 0.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  12. Let end be min(max(pos, 0), len).
+  13. Let searchLength be the number of elements in searchStr.
+  14. Let start be end - searchLength.
+  15. If start is less than 0, return false.
+  16. If the sequence of elements of S starting at start of length searchLength
+  is the same as the full element sequence of searchStr, return true.
+  ...
+---*/
+
+var str = 'The future is cool!';
+
+assert(
+  str.endsWith(''),
+  'str.endsWith("") returns true'
+);
+
+assert(
+  str.endsWith('', str.length),
+  'str.endsWith("", str.length) returns true'
+);
+
+assert(
+  str.endsWith('', Infinity),
+  'str.endsWith("", Infinity) returns true'
+);
+
+assert(
+  str.endsWith('', -1),
+  'str.endsWith("", -1) returns true'
+);
+
+assert(
+  str.endsWith('', -Infinity),
+  'str.endsWith("", -Infinity) returns true'
+);
\ No newline at end of file

test/built-ins/String/prototype/endsWith/searchstring-found-with-position.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: 21.1.3.6
+description: >
+  Returns true if searchString appears as a substring of the given string with a
+  given position.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  12. Let end be min(max(pos, 0), len).
+  13. Let searchLength be the number of elements in searchStr.
+  14. Let start be end - searchLength.
+  15. If start is less than 0, return false.
+  16. If the sequence of elements of S starting at start of length searchLength
+  is the same as the full element sequence of searchStr, return true.
+  ...
+---*/
+
+var str = 'The future is cool!';
+
+assert(
+  str.endsWith('The future', 10),
+  'str.endsWith("The future", 10) === true'
+);
+assert(
+  str.endsWith('future', 10),
+  'str.endsWith("future", 10) === true'
+);
+assert(
+  str.endsWith(' is cool!', str.length),
+  'str.endsWith(" is cool!", str.length) === true'
+);

test/built-ins/String/prototype/endsWith/searchstring-found-without-position.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: 21.1.3.6
+description: >
+  Returns true if searchString appears as a substring of the given string.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  12. Let end be min(max(pos, 0), len).
+  13. Let searchLength be the number of elements in searchStr.
+  14. Let start be end - searchLength.
+  15. If start is less than 0, return false.
+  16. If the sequence of elements of S starting at start of length searchLength
+  is the same as the full element sequence of searchStr, return true.
+  ...
+---*/
+
+var str = 'The future is cool!';
+
+assert(str.endsWith('cool!'), 'str.endsWith("cool!") === true');
+assert(str.endsWith('!'), 'str.endsWith("!") === true');
+assert(str.endsWith(str), 'str.endsWith(str) === true');

test/built-ins/String/prototype/endsWith/searchstring-is-regexp-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: 21.1.3.6
+description: >
+  Throws a TypeError if searchString is a RegExp.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  4. Let isRegExp be IsRegExp(searchString).
+  5. ReturnIfAbrupt(isRegExp).
+  6. If isRegExp is true, throw a TypeError exception.
+  ...
+---*/
+
+var searchString = /./;
+
+assert.throws(TypeError, function() {
+  ''.endsWith(searchString);
+});

test/built-ins/String/prototype/endsWith/searchstring-not-found-with-position.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: 21.1.3.6
+description: >
+  Returns false if searchString is not found with a given position.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  12. Let end be min(max(pos, 0), len).
+  13. Let searchLength be the number of elements in searchStr.
+  14. Let start be end - searchLength.
+  15. If start is less than 0, return false.
+  16. If the sequence of elements of S starting at start of length searchLength
+  is the same as the full element sequence of searchStr, return true.
+  17. Otherwise, return false.
+  ...
+---*/
+
+var str = 'The future is cool!';
+
+assert.sameValue(
+  str.endsWith('is cool!', str.length - 1), false,
+  'str.endsWith("is cool!", str.length - 1) === false'
+);
+
+assert.sameValue(
+  str.endsWith('!', 1), false,
+  'str.endsWith("!", 1) === false'
+);

test/built-ins/String/prototype/endsWith/searchstring-not-found-without-position.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: 21.1.3.6
+description: >
+  Returns false if searchString is not found.
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  ...
+  10. If endPosition is undefined, let pos be len, else let pos be
+  ToInteger(endPosition).
+  11. ReturnIfAbrupt(pos).
+  12. Let end be min(max(pos, 0), len).
+  13. Let searchLength be the number of elements in searchStr.
+  14. Let start be end - searchLength.
+  15. If start is less than 0, return false.
+  16. If the sequence of elements of S starting at start of length searchLength
+  is the same as the full element sequence of searchStr, return true.
+  17. Otherwise, return false.
+  ...
+---*/
+
+var str = 'The future is cool!';
+
+assert.sameValue(
+  str.endsWith('is Flash!'), false,
+  'str.endsWith("is Flash!") === false'
+);
+assert.sameValue(
+  str.endsWith('IS COOL!'), false,
+  'endsWith is case sensitive'
+);
+assert.sameValue(
+  str.endsWith('The future'), false,
+  'str.endsWith("The future") === false'
+);

test/built-ins/String/prototype/endsWith/this-is-null-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: 21.1.3.6
+description: >
+  Throws TypeError when `this` is null
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  1. Let O be RequireObjectCoercible(this value).
+  2. Let S be ToString(O).
+---*/
+
+assert.throws(TypeError, function() {
+  String.prototype.endsWith.call(null, '');
+});

test/built-ins/String/prototype/endsWith/this-is-undefined-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: 21.1.3.6
+description: >
+  Throws TypeError when `this` is undefined
+info: >
+  21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+
+  1. Let O be RequireObjectCoercible(this value).
+  2. Let S be ToString(O).
+---*/
+
+assert.throws(TypeError, function() {
+  String.prototype.endsWith.call(undefined, '');
+});