Merge pull request #349 from bocoup/String.fromCodePoint

Add tests for String.fromCodePoint

test/built-ins/String/fromCodePoint/argument-is-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: 21.1.2.2
+description: >
+  Return abrupt from ToNumber(next).
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  1. Let codePoints be a List containing the arguments passed to this function.
+  2. Let length be the number of elements in codePoints.
+  3. Let elements be a new List.
+  4. Let nextIndex be 0.
+  5. Repeat while nextIndex < length
+    a. Let next be codePoints[nextIndex].
+    b. Let nextCP be ToNumber(next).
+    c. ReturnIfAbrupt(nextCP).
+features: [Symbol]
+---*/
+
+assert.throws(TypeError, function() {
+  String.fromCodePoint(Symbol());
+});
+
+assert.throws(TypeError, function() {
+  String.fromCodePoint(42, Symbol());
+});

test/built-ins/String/fromCodePoint/argument-is-not-integer.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: 21.1.2.2
+description: >
+  Throw a RangeError if an argument is not equal to its Integer representation.
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  1. Let codePoints be a List containing the arguments passed to this function.
+  2. Let length be the number of elements in codePoints.
+  3. Let elements be a new List.
+  4. Let nextIndex be 0.
+  5. Repeat while nextIndex < length
+    a. Let next be codePoints[nextIndex].
+    b. Let nextCP be ToNumber(next).
+    c. ReturnIfAbrupt(nextCP).
+    d. If SameValue(nextCP, ToInteger(nextCP)) is false, throw a RangeError
+    exception.
+  ...
+---*/
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint(3.14);
+});
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint(42, 3.14);
+});
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint('3.14');
+});
+
+// ToNumber(undefined) returns NaN.
+assert.throws(RangeError, function() {
+  String.fromCodePoint(undefined);
+});
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint('_1');
+});
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint('1a');
+});

test/built-ins/String/fromCodePoint/argument-not-coercible.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: 21.1.2.2
+description: >
+  Return abrupt from ToNumber(next).
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  1. Let codePoints be a List containing the arguments passed to this function.
+  2. Let length be the number of elements in codePoints.
+  3. Let elements be a new List.
+  4. Let nextIndex be 0.
+  5. Repeat while nextIndex < length
+    a. Let next be codePoints[nextIndex].
+    b. Let nextCP be ToNumber(next).
+    c. ReturnIfAbrupt(nextCP).
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 'item', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  String.fromCodePoint({
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  });
+});
+
+assert.throws(Test262Error, function() {
+  String.fromCodePoint(42, {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  });
+});

test/built-ins/String/fromCodePoint/arguments-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: 21.1.2.2
+description: >
+  The the arguments list is empty, an empty string is returned.
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  1. Let codePoints be a List containing the arguments passed to this function.
+  ...
+  5. Repeat while nextIndex < length
+    ...
+    f. Append the elements of the UTF16Encoding (10.1.1) of nextCP to the end of
+    elements.
+    g. Let nextIndex be nextIndex + 1.
+  6. Return the String value whose elements are, in order, the elements in the
+  List elements. If length is 0, the empty string is returned.
+
+---*/
+
+assert.sameValue(String.fromCodePoint(), '');

test/built-ins/String/fromCodePoint/fromCodePoint.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: 21.1.2.2
+description: >
+  String.fromCodePoint property descriptor
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+verifyNotEnumerable(String, 'fromCodePoint');
+verifyWritable(String, 'fromCodePoint');
+verifyConfigurable(String, 'fromCodePoint');

test/built-ins/String/fromCodePoint/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: 21.1.2.2
+description: >
+  The length property of the String.fromCodePoint constructor is 1.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  String.fromCodePoint.length, 1,
+  'The value of `String.fromCodePoint.length` is `1`'
+);
+
+verifyNotEnumerable(String.fromCodePoint, 'length');
+verifyNotWritable(String.fromCodePoint, 'length');
+verifyConfigurable(String.fromCodePoint, 'length');

test/built-ins/String/fromCodePoint/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: 21.1.2.2
+description: >
+  String.fromCodePoint.name
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  String.fromCodePoint.name, 'fromCodePoint',
+  'The value of `String.fromCodePoint.name` is "fromCodePoint"'
+);
+
+verifyNotEnumerable(String.fromCodePoint, 'name');
+verifyNotWritable(String.fromCodePoint, 'name');
+verifyConfigurable(String.fromCodePoint, 'name');

test/built-ins/String/fromCodePoint/number-is-out-of-range.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: 21.1.2.2
+description: >
+  Throw a RangeError if an argument is < 0 or > 0x10FFFF.
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  1. Let codePoints be a List containing the arguments passed to this function.
+  2. Let length be the number of elements in codePoints.
+  3. Let elements be a new List.
+  4. Let nextIndex be 0.
+  5. Repeat while nextIndex < length
+    a. Let next be codePoints[nextIndex].
+    b. Let nextCP be ToNumber(next).
+    c. ReturnIfAbrupt(nextCP).
+    d. If SameValue(nextCP, ToInteger(nextCP)) is false, throw a RangeError
+    exception.
+    e. If nextCP < 0 or nextCP > 0x10FFFF, throw a RangeError exception.
+  ...
+---*/
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint(-1);
+});
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint(1, -1);
+});
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint(1114112);
+});
+
+assert.throws(RangeError, function() {
+  String.fromCodePoint(Infinity);
+});

test/built-ins/String/fromCodePoint/return-string-value.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: 21.1.2.2
+description: >
+  Returns the String value whose elements are, in order, the code unit for the
+  numbers in the arguments list.
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  1. Let codePoints be a List containing the arguments passed to this function.
+  ...
+  5. Repeat while nextIndex < length
+    ...
+    f. Append the elements of the UTF16Encoding (10.1.1) of nextCP to the end of
+    elements.
+    g. Let nextIndex be nextIndex + 1.
+  6. Return the String value whose elements are, in order, the elements in the
+  List elements. If length is 0, the empty string is returned.
+---*/
+
+assert.sameValue(String.fromCodePoint(0), '\x00');
+assert.sameValue(String.fromCodePoint(42), '*');
+assert.sameValue(String.fromCodePoint(65, 90), 'AZ');
+assert.sameValue(String.fromCodePoint(0x404), '\u0404');
+assert.sameValue(String.fromCodePoint(0x2F804), '\uD87E\uDC04');
+assert.sameValue(String.fromCodePoint(194564), '\uD87E\uDC04');
+assert.sameValue(
+  String.fromCodePoint(0x1D306, 0x61, 0x1D307),
+  '\uD834\uDF06a\uD834\uDF07'
+);
+assert.sameValue(String.fromCodePoint(1114111), '\uDBFF\uDFFF');

test/built-ins/String/fromCodePoint/to-number-conversions.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: 21.1.2.2
+description: >
+  Returns the String value with the code unit for the given coerced types.
+info: >
+  String.fromCodePoint ( ...codePoints )
+
+  1. Let codePoints be a List containing the arguments passed to this function.
+  ...
+  5. Repeat while nextIndex < length
+    a. Let next be codePoints[nextIndex].
+    b. Let nextCP be ToNumber(next).
+    ...
+  6. Return the String value whose elements are, in order, the elements in the
+  List elements. If length is 0, the empty string is returned.
+
+  Ref: 7.1.3 ToNumber ( argument )
+---*/
+
+assert.sameValue(String.fromCodePoint(null), '\x00');
+assert.sameValue(String.fromCodePoint(false), '\x00');
+assert.sameValue(String.fromCodePoint(true), '\x01');
+assert.sameValue(String.fromCodePoint('42'), '\x2A');
+assert.sameValue(String.fromCodePoint('042'), '\x2A');
+assert.sameValue(
+  String.fromCodePoint({ valueOf: function() { return 31; } }),
+  '\x1F'
+);