test(annotation_src): Verify clone does the right thing

test/core/annotation_src_spec.dart

@@ -0,0 +1,99 @@
+library annotation_src_spec;
+
+import 'package:angular/core/annotation_src.dart';
+import 'dart:mirrors';
+import '../_specs.dart';
+
+var _SYMBOL_NAME = new RegExp('"([^@]*).*"');
+_getName(VariableMirror v) => _SYMBOL_NAME.firstMatch(v.simpleName.toString()).group(1);
+
+Map<String, dynamic> variables(x) {
+  Map variables = {};
+  InstanceMirror mirror = reflect(x) as InstanceMirror;
+  ClassMirror type = mirror.type;
+  do {
+    type.declarations.forEach((k,v) {
+      if (v is VariableMirror && !v.isStatic) {
+        variables[_getName(v)] = mirror.getField(v.simpleName).reflectee;
+      }
+    });
+  } while ((type = type.superclass) != null);
+
+  return variables;
+}
+
+List<String> nullFields(x) {
+  var ret = [];
+  variables(x).forEach((k, v) {
+    if (v == null) ret.add(k);
+  });
+  return ret;
+}
+
+void main() => describe('annotations', () {
+  describe('component', () {
+    it('should set all fields on clone when all the fields are set', () {
+      var component = new Component(
+        template: '',
+        templateUrl: '',
+        cssUrl: [''],
+        applyAuthorStyles: true,
+        resetStyleInheritance: true,
+        publishAs: '',
+        module: (){},
+        map: {},
+        selector: '',
+        visibility: Directive.LOCAL_VISIBILITY,
+        exportExpressions: [],
+        exportExpressionAttrs: []
+      );
+
+      // Check that no fields are null
+      expect(nullFields(component)).toEqual([]);
+
+      // Check that the clone is the same as the original.
+      expect(variables(cloneWithNewMap(component, {}))).toEqual(variables(component));
+    });
+  });
+
+  describe('decorator', () {
+    it('should set all fields on clone when all the fields are set', () {
+      var decorator = new Decorator(
+          children: 'xxx',
+          map: {},
+          selector: '',
+          module: (){},
+          visibility: Directive.LOCAL_VISIBILITY,
+          exportExpressions: [],
+          exportExpressionAttrs: []
+      );
+
+      // Check that no fields are null
+      expect(nullFields(decorator)).toEqual([]);
+
+      // Check that the clone is the same as the original.
+      expect(variables(cloneWithNewMap(decorator, {}))).toEqual(variables(decorator));
+    });
+  });
+
+  describe('controller', () {
+    it('should set all fields on clone when all the fields are set', () {
+      var controller = new Controller(
+          publishAs: '',
+          children: 'xxx',
+          map: {},
+          selector: '',
+          module: (){},
+          visibility: Directive.LOCAL_VISIBILITY,
+          exportExpressions: [],
+          exportExpressionAttrs: []
+      );
+
+      // Check that no fields are null
+      expect(nullFields(controller)).toEqual([]);
+
+      // Check that the clone is the same as the original.
+      expect(variables(cloneWithNewMap(controller, {}))).toEqual(variables(controller));
+    });
+  });
+});