feat(injector): initial implementaion of dynamic injector

modules/test_lib/src/test_lib.dart

@@ -1,5 +1,45 @@
 library test_lib.test_lib;
-export 'package:guinness/guinness.dart' show
-    describe, ddescribe, xdescribe,
-    it, xit, iit,
-    beforeEach, afterEach, expect;
+
+import 'package:guinness/guinness_html.dart' as gns;
+export 'package:guinness/guinness_html.dart';
+import 'package:unittest/unittest.dart' hide expect;
+import 'dart:mirrors';
+import 'dart:async';
+
+Expect expect(actual, [matcher]) {
+  final expect = new Expect(actual);
+  if (matcher != null) expect.to(matcher);
+  return expect;
+}
+
+class Expect extends gns.Expect {
+  Expect(actual) : super(actual);
+
+  void toThrowError(message) => this.toThrowWith(message: message);
+  void toBeFuture() => _expect(actual is Future, equals(true));
+  Function get _expect => gns.guinness.matchers.expect;
+}
+
+it(name, fn) {
+  gns.it(name, _handleAsync(fn));
+}
+
+iit(name, fn) {
+  gns.iit(name, _handleAsync(fn));
+}
+
+_handleAsync(fn) {
+  ClosureMirror cm = reflect(fn);
+  MethodMirror mm = cm.function;
+
+  var completer = new Completer();
+
+  if (mm.parameters.length == 1) {
+    return () {
+      cm.apply([completer.complete]);
+      return completer.future;
+    };
+  }
+
+  return fn;
+}

modules/test_lib/src/test_lib.es6

@@ -16,3 +16,35 @@ window.print = function(msg) {
     window.console.log(msg);
   }
 };
+
+window.beforeEach(function() {
+  jasmine.addMatchers({
+    toBeFuture: function() {
+      return {
+        compare: function (actual, expectedClass) {
+          var pass = typeof actual === 'object' && typeof actual.then === 'function';
+          return {
+            pass: pass,
+            get message() {
+              return 'Expected ' + actual + ' to be a future';
+            }
+          };
+        }
+      };
+    },
+
+    toBeAnInstanceOf: function() {
+      return {
+        compare: function(actual, expectedClass) {
+          var pass = typeof actual === 'object' && actual instanceof expectedClass;
+          return {
+            pass: pass,
+            get message() {
+              return 'Expected ' + actual + ' to be an instance of ' + expectedClass;
+            }
+          };
+        }
+      };
+    }
+  });
+});