String encoding utility methods and tests for Unicode, UTF-8, -16 and -32.

utils/tests/string_encoding/utf16_tests.dart

+#!/usr/bin/env dart
+// 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("utf16_tests");
+#import("dunit.dart");
+#import("../../string_encoding/utf16.dart");
+
+void main() {
+  TestSuite suite = new TestSuite();
+  suite.registerTestClass(new Utf16Tests());
+  suite.run();
+}
+
+class Utf16Tests extends TestClass {
+  static final String testKoreanCharSubset = """
+가각갂갃간갅갆갇갈갉갊갋갌갍갎갏감갑값갓갔강갖갗갘같갚갛
+개객갞갟갠갡갢갣갤갥갦갧갨갩갪갫갬갭갮갯갰갱갲갳갴갵갶갷
+갸갹갺갻갼갽갾갿걀걁걂걃걄걅걆걇걈걉걊걋걌걍걎걏걐걑걒걓""";
+  static final String testHanWater = "水";
+
+  static final List<int> testKoreanCharSubsetUtf16be = 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];
+
+  void registerTests(TestSuite suite) {
+    register("testEncodeToUtf16", testEncodeToUtf16, suite);
+    register("testUtf16BytesToString", testUtf16BytesToString, suite);
+  }
+
+  void testEncodeToUtf16() {
+    Expect.listEquals(testKoreanCharSubsetUtf16be,
+        encodeAsUtf16(testKoreanCharSubset),
+        "encode UTF-16(BE by default) Korean");
+
+    Expect.listEquals([
+        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], encodeAsUtf16le(testKoreanCharSubset),
+        "encode UTF-16LE Korean");
+  }
+
+  void testUtf16BytesToString() {
+    Expect.stringEquals(testHanWater, decodeFromUtf16([0x6C, 0x34]),
+        "Water variation 1");
+    Expect.stringEquals(testHanWater, decodeFromUtf16([0xFE, 0xFF, 0x6C, 0x34]),
+        "Water variation 2");
+    Expect.stringEquals(testHanWater, decodeFromUtf16([0xFF, 0xFE, 0x34, 0x6C]),
+        "Water variation 3");
+
+    Expect.stringEquals(testHanWater, decodeFromUtf16be([0x6C, 0x34]),
+        "Water variation 4");
+    Expect.stringEquals(testHanWater,
+        decodeFromUtf16be([0xFE, 0xFF, 0x6C, 0x34]),
+        "Water variation 5");
+
+    Expect.stringEquals(testHanWater, decodeFromUtf16le([0x34, 0x6C]),
+        "Water variation 6");
+    Expect.stringEquals(testHanWater,
+        decodeFromUtf16le([0xFF, 0xFE, 0x34, 0x6C]),
+        "Water variation 7");
+
+    Expect.stringEquals(testKoreanCharSubset,
+        decodeFromUtf16(testKoreanCharSubsetUtf16be), "UTF-16BE Korean");
+  }
+}