Adding Angular's DI package & Dart unittests which test it.

third_party/pkg/di/test/fixed-unittest.dart

+library unittest;
+
+import 'package:unittest/unittest.dart';
+import 'package:di/mirrors.dart';
+import 'dart:async';
+
+export 'package:unittest/unittest.dart';
+
+// Jasmine-like syntax for unittest.
+void describe(String spec, TestFunction body) => group(spec, body);
+void ddescribe(String spec, TestFunction body) => solo_group(spec, body);
+void xdescribe(String spec, TestFunction body) {}
+void it(String spec, TestFunction body) => test(spec, body);
+void xit(String spec, TestFunction body) {}
+void iit(String spec, TestFunction body) => solo_test(spec, body);
+
+Matcher toEqual(expected) => equals(expected);
+Matcher toContain(expected) => contains(expected);
+Matcher toBe(expected) => same(expected);
+Matcher instanceOf(Type t) => new IsInstanceOfTypeMatcher(t);
+
+Matcher toThrow(Type exceptionClass, String message) =>
+  new ThrowsMatcher(new ComplexExceptionMatcher(
+      instanceOf(exceptionClass), toContain(message)));
+
+Matcher not(Matcher matcher) => new NegateMatcher(matcher);
+
+
+class NegateMatcher extends Matcher {
+  final Matcher _matcher;
+
+  const NegateMatcher(this._matcher);
+
+  bool matches(obj, Map ms) => !_matcher.matches(obj, ms);
+
+  Description describe(Description description) =>
+      _matcher.describe(description.add('NOT'));
+
+  Description describeMismatch(item, Description mismatchDescription,
+      Map matchState, bool verbose) {
+    return _matcher.describeMismatch(
+        item, mismatchDescription, matchState, verbose);
+  }
+}
+
+
+class ThrowsMatcher extends Throws {
+  final Matcher _matcher;
+
+  const ThrowsMatcher([Matcher matcher]) : _matcher = matcher, super(matcher);
+
+  Description describeMismatch(item, Description mismatchDescription,
+                               Map matchState,
+                               bool verbose) {
+    if (item is! Function && item is! Future) {
+      return mismatchDescription.add(' not a Function or Future');
+    }
+
+    if (_matcher == null || matchState == null) {
+      return mismatchDescription.add(' did not throw any exception');
+    }
+
+    return _matcher.describeMismatch(item, mismatchDescription,
+        matchState, verbose);
+  }
+}
+
+class ComplexExceptionMatcher extends Matcher {
+  Matcher classMatcher;
+  Matcher messageMatcher;
+
+  ComplexExceptionMatcher(this.classMatcher, this.messageMatcher);
+
+  bool matches(obj, Map ms) {
+    if (!classMatcher.matches(obj, ms)) {
+      return false;
+    }
+
+    return messageMatcher.matches(obj.message, ms);
+  }
+
+  Description describe(Description description) =>
+      messageMatcher.describe(classMatcher.describe(description).add(' with message '));
+
+  Description describeMismatch(item, Description mismatchDescription,
+      Map matchState, bool verbose) {
+    var e = matchState['exception'];
+
+    mismatchDescription.add('threw ').addDescriptionOf(e);
+
+    try {
+      var message = e.message; // does not have to be defined
+      mismatchDescription.add(' with message ').addDescriptionOf(message);
+    } catch (e) {}
+  }
+}
+
+class IsInstanceOfTypeMatcher extends Matcher {
+  Type t;
+
+  IsInstanceOfTypeMatcher(this.t);
+
+  bool matches(obj, Map matchState) =>
+      reflect(obj).type.qualifiedName == reflectClass(t).qualifiedName;
+
+  Description describe(Description description) =>
+      description.add('an instance of ${t.toString()}');
+}