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packages/utf/test/utf16_test.dart

Index: packages/utf/test/utf16_test.dart
diff --git a/packages/utf/test/utf16_test.dart b/packages/utf/test/utf16_test.dart
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+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library utf.utf16_test;
+
+import 'package:expect/expect.dart';
+import 'package:utf/utf.dart';
+
+const String testKoreanCharSubset = """
+가각갂갃간갅갆갇갈갉갊갋갌갍갎갏감갑값갓갔강갖갗갘같갚갛
+개객갞갟갠갡갢갣갤갥갦갧갨갩갪갫갬갭갮갯갰갱갲갳갴갵갶갷
+갸갹갺갻갼갽갾갿걀걁걂걃걄걅걆걇걈걉걊걋걌걍걎걏걐걑걒걓""";
+
+const String testHanWater = "水";
+
+const List<int> testKoreanCharSubsetUtf16beBom = const<int>[
+    0xfe, 0xff, 0xac, 0x00, 0xac, 0x01, 0xac, 0x02,
+    0xac, 0x03, 0xac, 0x04, 0xac, 0x05, 0xac, 0x06,
+    0xac, 0x07, 0xac, 0x08, 0xac, 0x09, 0xac, 0x0a,
+    0xac, 0x0b, 0xac, 0x0c, 0xac, 0x0d, 0xac, 0x0e,
+    0xac, 0x0f, 0xac, 0x10, 0xac, 0x11, 0xac, 0x12,
+    0xac, 0x13, 0xac, 0x14, 0xac, 0x15, 0xac, 0x16,
+    0xac, 0x17, 0xac, 0x18, 0xac, 0x19, 0xac, 0x1a,
+    0xac, 0x1b, 0x00, 0x0a, 0xac, 0x1c, 0xac, 0x1d,
+    0xac, 0x1e, 0xac, 0x1f, 0xac, 0x20, 0xac, 0x21,
+    0xac, 0x22, 0xac, 0x23, 0xac, 0x24, 0xac, 0x25,
+    0xac, 0x26, 0xac, 0x27, 0xac, 0x28, 0xac, 0x29,
+    0xac, 0x2a, 0xac, 0x2b, 0xac, 0x2c, 0xac, 0x2d,
+    0xac, 0x2e, 0xac, 0x2f, 0xac, 0x30, 0xac, 0x31,
+    0xac, 0x32, 0xac, 0x33, 0xac, 0x34, 0xac, 0x35,
+    0xac, 0x36, 0xac, 0x37, 0x00, 0x0a, 0xac, 0x38,
+    0xac, 0x39, 0xac, 0x3a, 0xac, 0x3b, 0xac, 0x3c,
+    0xac, 0x3d, 0xac, 0x3e, 0xac, 0x3f, 0xac, 0x40,
+    0xac, 0x41, 0xac, 0x42, 0xac, 0x43, 0xac, 0x44,
+    0xac, 0x45, 0xac, 0x46, 0xac, 0x47, 0xac, 0x48,
+    0xac, 0x49, 0xac, 0x4a, 0xac, 0x4b, 0xac, 0x4c,
+    0xac, 0x4d, 0xac, 0x4e, 0xac, 0x4f, 0xac, 0x50,
+    0xac, 0x51, 0xac, 0x52, 0xac, 0x53];
+
+const List<int> testKoreanCharSubsetUtf16le = const<int>    [
+    0x00, 0xac, 0x01, 0xac, 0x02, 0xac, 0x03, 0xac,
+    0x04, 0xac, 0x05, 0xac, 0x06, 0xac, 0x07, 0xac,
+    0x08, 0xac, 0x09, 0xac, 0x0a, 0xac, 0x0b, 0xac,
+    0x0c, 0xac, 0x0d, 0xac, 0x0e, 0xac, 0x0f, 0xac,
+    0x10, 0xac, 0x11, 0xac, 0x12, 0xac, 0x13, 0xac,
+    0x14, 0xac, 0x15, 0xac, 0x16, 0xac, 0x17, 0xac,
+    0x18, 0xac, 0x19, 0xac, 0x1a, 0xac, 0x1b, 0xac,
+    0x0a, 0x00, 0x1c, 0xac, 0x1d, 0xac, 0x1e, 0xac,
+    0x1f, 0xac, 0x20, 0xac, 0x21, 0xac, 0x22, 0xac,
+    0x23, 0xac, 0x24, 0xac, 0x25, 0xac, 0x26, 0xac,
+    0x27, 0xac, 0x28, 0xac, 0x29, 0xac, 0x2a, 0xac,
+    0x2b, 0xac, 0x2c, 0xac, 0x2d, 0xac, 0x2e, 0xac,
+    0x2f, 0xac, 0x30, 0xac, 0x31, 0xac, 0x32, 0xac,
+    0x33, 0xac, 0x34, 0xac, 0x35, 0xac, 0x36, 0xac,
+    0x37, 0xac, 0x0a, 0x00, 0x38, 0xac, 0x39, 0xac,
+    0x3a, 0xac, 0x3b, 0xac, 0x3c, 0xac, 0x3d, 0xac,
+    0x3e, 0xac, 0x3f, 0xac, 0x40, 0xac, 0x41, 0xac,
+    0x42, 0xac, 0x43, 0xac, 0x44, 0xac, 0x45, 0xac,
+    0x46, 0xac, 0x47, 0xac, 0x48, 0xac, 0x49, 0xac,
+    0x4a, 0xac, 0x4b, 0xac, 0x4c, 0xac, 0x4d, 0xac,
+    0x4e, 0xac, 0x4f, 0xac, 0x50, 0xac, 0x51, 0xac,
+    0x52, 0xac, 0x53, 0xac];
+
+void main() {
+  testEncodeToUtf16();
+  testUtf16BytesToString();
+  testIterableMethods();
+}
+
+void testEncodeToUtf16() {
+  Expect.listEquals([], encodeUtf16be("")); // TODO(dcarlson) should we skip bom if empty?
+  Expect.listEquals(testKoreanCharSubsetUtf16beBom,
+      encodeUtf16(testKoreanCharSubset),
+      "encode UTF-16(BE by default) Korean");
+
+  Expect.listEquals(testKoreanCharSubsetUtf16le,
+      encodeUtf16le(testKoreanCharSubset),
+      "encode UTF-16LE Korean");
+}
+
+void testUtf16BytesToString() {
+  Expect.stringEquals("", decodeUtf16([]));
+  Expect.stringEquals(testHanWater, decodeUtf16([0x6C, 0x34]),
+      "Water variation 1");
+  Expect.stringEquals(testHanWater, decodeUtf16([0xFE, 0xFF, 0x6C, 0x34]),
+      "Water variation 2");
+  Expect.stringEquals(testHanWater, decodeUtf16([0xFF, 0xFE, 0x34, 0x6C]),
+      "Water variation 3");
+
+  Expect.stringEquals(testHanWater, decodeUtf16be([0x6C, 0x34]),
+      "Water variation 4");
+  Expect.stringEquals(testHanWater,
+      decodeUtf16be([0xFE, 0xFF, 0x6C, 0x34]),
+      "Water variation 5");
+
+  Expect.stringEquals(testHanWater, decodeUtf16le([0x34, 0x6C]),
+      "Water variation 6");
+  Expect.stringEquals(testHanWater,
+      decodeUtf16le([0xFF, 0xFE, 0x34, 0x6C]),
+      "Water variation 7");
+
+  Expect.stringEquals(testKoreanCharSubset,
+      decodeUtf16(testKoreanCharSubsetUtf16beBom), "UTF-16BE Korean");
+}
+
+void testIterableMethods() {
+  // empty input
+  Expect.isFalse(decodeUtf16AsIterable([]).iterator.moveNext());
+
+  IterableUtf16Decoder koreanDecoder =
+    decodeUtf16AsIterable(testKoreanCharSubsetUtf16beBom);
+  // get the first character
+  Expect.equals(testKoreanCharSubset.codeUnits[0], koreanDecoder.first);
+  // get the whole translation using the Iterable interface
+  Expect.stringEquals(testKoreanCharSubset,
+      new String.fromCharCodes(new List<int>.from(koreanDecoder)));
+
+  // specify types
+  Expect.equals(44032, (new List<int>
+      .from(decodeUtf16beAsIterable(testKoreanCharSubsetUtf16beBom)))[0]);
+  Expect.equals(44032, (new List<int>
+      .from(decodeUtf16leAsIterable(testKoreanCharSubsetUtf16le)))[0]);
+  bool stripBom = false;
+  Expect.equals(UNICODE_BOM, (new List<int>
+      .from(decodeUtf16beAsIterable(testKoreanCharSubsetUtf16beBom,
+            0, null, stripBom)))[0]);
+}