feat(forms): add form builder

modules/angular2/test/forms/form_builder_spec.js

@@ -0,0 +1,65 @@
+import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach, el} from 'angular2/test_lib';
+import {Control, FormBuilder} from 'angular2/forms';
+import * as validations from 'angular2/forms';
+
+export function main() {
+  describe("Form Builder", () => {
+    var b;
+
+    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", validations.required]
+      });
+
+      expect(g.controls["login"].value).toEqual("some value");
+      expect(g.controls["password"].value).toEqual("some value");
+      expect(g.controls["password"].validator).toEqual(validations.required);
+    });
+
+    it("should use controls", () => {
+      var g = b.group({
+        "login": b.control("some value", validations.required)
+      });
+
+      expect(g.controls["login"].value).toEqual("some value");
+      expect(g.controls["login"].validator).toBe(validations.required);
+    });
+
+    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": validations.nullValidator});
+
+      expect(g.validator).toBe(validations.nullValidator);
+    });
+
+    it("should use default validators when no validators are provided", () => {
+      var g = b.group({
+        "login": "some value"
+      });
+      expect(g.controls["login"].validator).toBe(validations.nullValidator);
+      expect(g.validator).toBe(validations.controlGroupValidator);
+    });
+  });
+}