[Intl] Add unit tests for Intl.Segmenter

Bug: v8:6891
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I075c4f615a4366c34723104410e8445054a3cacd
Reviewed-on: https://chromium-review.googlesource.com/c/1256867Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56424}

test/intl/intl.status

@@ -31,6 +31,13 @@
   'overrides/caching': [PASS, FAIL],
 
   'date-format/constructor-order': [FAIL],
+
+  # https://bugs.chromium.org/p/v8/issues/detail?id=6891
+  'segmenter/segment': [FAIL],
+  'segmenter/segment-iterator': [FAIL],
+  'segmenter/segment-iterator-following': [FAIL],
+  'segmenter/segment-iterator-next': [FAIL],
+  'segmenter/segment-iterator-preceding': [FAIL],
 }],  # ALWAYS
 
 ['variant == no_wasm_traps', {

test/intl/segmenter/constructor.js

 // Copyright 2018 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-lineBreakStyle license that can be
+// Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --harmony-intl-segmenter

test/intl/segmenter/resolved-options.js

 // Copyright 2018 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-lineBreakStyle license that can be
+// Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --harmony-intl-segmenter

test/intl/segmenter/segment-iterator-following.js

+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-intl-segmenter
+
+const segmenter = new Intl.Segmenter();
+const text = "Hello World, Test 123! Foo Bar. How are you?";
+const iter = segmenter.segment(text);
+
+assertEquals("function", typeof iter.following);
+
+// 1.5.3.2 %SegmentIteratorPrototype%.following( [ from ] )
+// 3.b If from >= iterator.[[SegmentIteratorString]], throw a RangeError exception.
+assertDoesNotThrow(() => iter.following(text.length - 1));
+assertThrows(() => iter.following(text.length), RangeError);
+assertThrows(() => iter.following(text.length + 1), RangeError);

test/intl/segmenter/segment-iterator-next.js

+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-intl-segmenter
+
+const segmenter = new Intl.Segmenter();
+const text = "Hello World, Test 123! Foo Bar. How are you?";
+const iter = segmenter.segment(text);
+
+assertEquals("function", typeof iter.next);

test/intl/segmenter/segment-iterator-preceding.js

+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-intl-segmenter
+
+const segmenter = new Intl.Segmenter();
+const text = "Hello World, Test 123! Foo Bar. How are you?";
+const iter = segmenter.segment(text);
+
+assertEquals("function", typeof iter.preceding);
+
+// 1.5.3.3 %SegmentIteratorPrototype%.preceding( [ from ] )
+// 3.b If ... from = 0, throw a RangeError exception.
+assertThrows(() => iter.preceding(0), RangeError);
+
+// 1.5.3.3 %SegmentIteratorPrototype%.preceding( [ from ] )
+// 3.b If from > iterator.[[SegmentIteratorString]] ... , throw a RangeError exception.
+assertDoesNotThrow(() => iter.preceding(text.length - 1));
+assertDoesNotThrow(() => iter.preceding(text.length));
+assertThrows(() => iter.preceding(text.length + 1), RangeError);

test/intl/segmenter/segment-iterator.js

+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-intl-segmenter
+
+const segmenter = new Intl.Segmenter();
+const text = "Hello World, Test 123! Foo Bar. How are you?";
+const iter = segmenter.segment(text);
+
+assertEquals("number", typeof iter.position);
+assertEquals(0, iter.position);
+assertEquals("strig", typeof iter.breakType);

test/intl/segmenter/segment.js

+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-intl-segmenter
+
+assertEquals("function", typeof Intl.Segmenter.prototype.segment);