Adding Angular and dependent packages for testing

third_party/pkg/angular/lib/mock/test_injection.dart

Index: third_party/pkg/angular/lib/mock/test_injection.dart
diff --git a/third_party/pkg/angular/lib/mock/test_injection.dart b/third_party/pkg/angular/lib/mock/test_injection.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ae1542d34ea327e55f236ee524904382ec7f23c2
--- /dev/null
+++ b/third_party/pkg/angular/lib/mock/test_injection.dart
@@ -0,0 +1,134 @@
+part of angular.mock;
+
+_SpecInjector _currentSpecInjector = null;
+
+class _SpecInjector {
+  DynamicInjector moduleInjector;
+  DynamicInjector injector;
+  List<Module> modules = [];
+  List<Function> initFns = [];
+
+  _SpecInjector() {
+    var moduleModule = new Module()
+      ..factory(Module, (Injector injector) => addModule(new Module()));
+    moduleInjector = new DynamicInjector(modules: [moduleModule]);
+  }
+
+  addModule(module) {
+    if (injector != null) {
+      throw ["Injector already crated, can not add more modules."];
+    }
+    modules.add(module);
+    return module;
+  }
+
+  module(fnOrModule, [declarationStack]) {
+    try {
+      if (fnOrModule is Function) {
+        var initFn = moduleInjector.invoke(fnOrModule);
+        if (initFn is Function) {
+          initFns.add(initFn);
+        }
+      } else if (fnOrModule is Module) {
+        addModule(fnOrModule);
+      } else {
+        throw 'Unsupported type: $fnOrModule';
+      }
+    } catch (e, s) {
+      throw "$e\n$s\nDECLARED AT:$declarationStack";
+    }
+  }
+
+  inject(Function fn, [declarationStack]) {
+    try {
+      if (injector == null) {
+        injector = new DynamicInjector(modules: modules); // Implicit injection is disabled.
+        initFns.forEach((fn) {
+          injector.invoke(fn);
+        });
+      }
+      injector.invoke(fn);
+    } catch (e, s) {
+      throw "$e\n$s\nDECLARED AT:$declarationStack";
+    }
+  }
+
+  reset() {
+    injector = null;
+  }
+}
+
+/**
+ * Allows the injection of instances into a test. See [module] on how to install new
+ * types into injector.
+ *
+ * NOTE: Calling inject creates an injector, which prevents any more calls to [module].
+ *
+ * Typical usage:
+ *
+ *     test('wrap whole test', inject((TestBed tb) {
+ *       tb.compile(...);
+ *     });
+ *
+ *     test('wrap part of a test', () {
+ *       module((Module module) {
+ *         module.type(Foo);
+ *       });
+ *       inject((TestBed tb) {
+ *         tb.compile(...);
+ *       });
+ *     });
+ *
+ */
+inject(Function fn) {
+  try { throw ''; } catch (e, stack) {
+    if (_currentSpecInjector == null ) {
+      return () => _currentSpecInjector.inject(fn, stack);
+    } else {
+      return _currentSpecInjector.inject(fn, stack);
+    }
+  }
+}
+
+/**
+ * Allows the installation of new types/modules into the current test injector.
+ *
+ * This method can be called in declaration or inline in test. The method can be called
+ * repeatedly, as long as [inject] is not called. Invocation of [inject] creates the injector and
+ * hence no more calls to [module] can be made.
+ *
+ *     setUp(module((Module model) {
+ *       module.type(Foo);
+ *     });
+ *
+ *     test('foo', () {
+ *       module((Module module) {
+ *         module.type(Foo);
+ *       });
+ *     });
+ */
+module(fnOrModule) {
+  try { throw ''; } catch(e, stack) {
+    if (_currentSpecInjector == null ) {
+      return () => _currentSpecInjector.module(fnOrModule, stack);
+    } else {
+      return _currentSpecInjector.module(fnOrModule, stack);
+    }
+  }
+}
+
+/**
+ * Call this method in your test harness [setUp] method to setup the injector.
+ */
+setUpInjector() {
+  _currentSpecInjector = new _SpecInjector();
+  _currentSpecInjector.module((Module m) {
+    m.install(new AngularModule());
+    m.install(new AngularMockModule());
+  });
+}
+
+/**
+ * Call this method in your test harness [tearDown] method to cleanup the injector.
+ */
+tearDownInjector() => _currentSpecInjector = null;