feat(forms): add easy way to switch between forms modules (#9202)

modules/@angular/forms/test/form_builder_spec.ts

@@ -0,0 +1,63 @@
+import {afterEach, beforeEach, ddescribe, describe, expect, iit, it, xit} from '@angular/core/testing/testing_internal';
+import {FormBuilder, FormControl} from '@angular/forms';
+
+import {PromiseWrapper} from '../src/facade/promise';
+
+export function main() {
+  function syncValidator(_: any /** TODO #9100 */): any /** TODO #9100 */ { return null; }
+  function asyncValidator(_: any /** TODO #9100 */) { return PromiseWrapper.resolve(null); }
+
+  describe('Form Builder', () => {
+    var b: any /** TODO #9100 */;
+
+    beforeEach(() => { b = new FormBuilder(); });
+
+    it('should create controls from a value', () => {
+      var g = b.group({'login': 'some value'});
+
+      expect(g.controls['login'].value).toEqual('some value');
+    });
+
+    it('should create controls from an array', () => {
+      var g = b.group(
+          {'login': ['some value'], 'password': ['some value', syncValidator, asyncValidator]});
+
+      expect(g.controls['login'].value).toEqual('some value');
+      expect(g.controls['password'].value).toEqual('some value');
+      expect(g.controls['password'].validator).toEqual(syncValidator);
+      expect(g.controls['password'].asyncValidator).toEqual(asyncValidator);
+    });
+
+    it('should use controls', () => {
+      var g = b.group({'login': b.control('some value', syncValidator, asyncValidator)});
+
+      expect(g.controls['login'].value).toEqual('some value');
+      expect(g.controls['login'].validator).toBe(syncValidator);
+      expect(g.controls['login'].asyncValidator).toBe(asyncValidator);
+    });
+
+    it('should create groups with optional controls', () => {
+      var g = b.group({'login': 'some value'}, {'optionals': {'login': false}});
+
+      expect(g.contains('login')).toEqual(false);
+    });
+
+    it('should create groups with a custom validator', () => {
+      var g = b.group(
+          {'login': 'some value'}, {'validator': syncValidator, 'asyncValidator': asyncValidator});
+
+      expect(g.validator).toBe(syncValidator);
+      expect(g.asyncValidator).toBe(asyncValidator);
+    });
+
+    it('should create control arrays', () => {
+      var c = b.control('three');
+      var a = b.array(
+          ['one', ['two', syncValidator], c, b.array(['four'])], syncValidator, asyncValidator);
+
+      expect(a.value).toEqual(['one', 'two', 'three', ['four']]);
+      expect(a.validator).toBe(syncValidator);
+      expect(a.asyncValidator).toBe(asyncValidator);
+    });
+  });
+}