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

utils/tests/string_encoding/DUnit.dart

Index: utils/tests/string_encoding/DUnit.dart
diff --git a/utils/tests/string_encoding/DUnit.dart b/utils/tests/string_encoding/DUnit.dart
new file mode 100644
index 0000000000000000000000000000000000000000..bcaae95c8896b503859e5bc3305fc09b83275530
--- /dev/null
+++ b/utils/tests/string_encoding/DUnit.dart
@@ -0,0 +1,117 @@
+#!/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("DUnit");
+
+typedef void Test();
+typedef TestResult SynchTest();
+typedef Future<TestResult> AsynchTest();
+
+class TestSuite {
+  TestSuite() : _tests = <SynchTest>[];
+
+  void registerTestClass(TestClass tests) {
+    tests.registerTests(this);
+  }
+
+  void _registerTest(SynchTest test) {
+    _tests.add(test);
+  }
+
+  void run() {
+    reportResults(runTests());
+  }
+
+  List<TestResult> runTests() {
+    List<TestResult> results = <TestResult>[];
+    for(Function test in _tests) {
+      results.add(test());
+    }
+    return results;
+  }
+
+  void reportResults(List<TestResult> results) {
+    if(results.every(bool _(TestResult r) => r is PassedTest)) {
+      print("OK -- ALL TESTS PASS (${results.length} run)");
+    } else {
+      for(TestResult r in
+          results.filter(bool _(TestResult r) => !(r is PassedTest))) {
+        print(r);
+      }
+      int passedTests =
+          results.filter(bool _(TestResult r) => r is PassedTest).length;
+      int failures =
+          results.filter(bool _(TestResult r) => r is FailedTest).length;
+      int errors =
+          results.filter(bool _(TestResult r) => r is TestError).length;
+      print("FAIL -- TESTS RUN: ${results.length}");
+      print("        PASSED: ${passedTests}");
+      print("        FAILED: ${failures}");
+      print("        ERRORS: ${errors}");
+    }
+  }
+
+  List<SynchTest> _tests;
+}
+
+interface TestResult {
+  String get testDescription();
+}
+
+class PassedTest implements TestResult {
+  const PassedTest(String this._testDescription);
+  String get testDescription() => _testDescription;
+  final String _testDescription;
+  String toString() => _testDescription;
+}
+
+class _ExceptionResult {
+  const _ExceptionResult(String this._testDescription, var this._exception);
+
+  String get testDescription() => _testDescription;
+  final String _testDescription;
+
+  Object get exception() => _exception;
+  final _exception;
+}
+
+class FailedTest extends _ExceptionResult implements TestResult {
+  FailedTest(String testDescription, var exception) :
+      super(testDescription, exception);
+
+  String toString() => ">>> Test failure in ${_testDescription} " +
+      "with:\n${exception}\n";
+}
+
+class TestError extends _ExceptionResult implements TestResult {
+  TestError(String testDescription, var exception) :
+      super(testDescription, exception);
+
+  String toString() => ">>> Test error caught in " +
+      "${_testDescription} with:\n${exception}\n";
+}
+
+class TestClass {
+  void register(String description, Function test, TestSuite suite) {
+    suite._registerTest(TestResult _() {
+      setUp();
+      try {
+        test();
+        tearDown();
+        return new PassedTest(description);
+      } catch (ExpectException x) {
+        tearDown();
+        return new FailedTest(description, x);
+      } catch (var x) {
+        tearDown();
+        return new TestError(description, x);
+      }
+    });
+  }
+
+  abstract void registerTests(TestSuite suite);
+  void setUp() {}
+  void tearDown() {}
+}