angular-docs-cn/modules/angular2/test/forms/model_spec.js

import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach, el,
  AsyncTestCompleter, inject} from 'angular2/test_lib';
import {ControlGroup, Control, OptionalControl, Validators} from 'angular2/forms';;
import {ObservableWrapper} from 'angular2/src/facade/async';
import {ListWrapper} from 'angular2/src/facade/collection';

export function main() {
  describe("Form Model", () => {
    describe("Control", () => {
      describe("validator", () => {
        it("should run validator with the initial value", () => {
          var c = new Control("value", Validators.required);
          expect(c.valid).toEqual(true);
        });

        it("should rerun the validator when the value changes", () => {
          var c = new Control("value", Validators.required);
          c.updateValue(null);
          expect(c.valid).toEqual(false);
        });

        it("should return errors", () => {
          var c = new Control(null, Validators.required);
          expect(c.errors).toEqual({"required" : true});
        });
      });

      describe("pristine", () => {
        it("should be true after creating a control", () => {
          var c = new Control("value");
          expect(c.pristine).toEqual(true);
        });

        it("should be false after changing the value of the control", () => {
          var c = new Control("value");
          c.updateValue("new value");
          expect(c.pristine).toEqual(false);
        });
      });

      describe("dirty", () => {
        it("should be false after creating a control", () => {
          var c = new Control("value");
          expect(c.dirty).toEqual(false);
        });

        it("should be true after changing the value of the control", () => {
          var c = new Control("value");
          c.updateValue("new value");
          expect(c.dirty).toEqual(true);
        });
      });
    });

    describe("ControlGroup", () => {
      describe("value", () => {
        it("should be the reduced value of the child controls", () => {
          var g = new ControlGroup({
            "one": new Control("111"),
            "two": new Control("222")
          });
          expect(g.value).toEqual({"one": "111", "two": "222"});
        });

        it("should be empty when there are no child controls", () => {
          var g = new ControlGroup({});
          expect(g.value).toEqual({});
        });

        it("should support nested groups", () => {
          var g = new ControlGroup({
            "one": new Control("111"),
            "nested": new ControlGroup({
              "two" : new Control("222")
            })
          });
          expect(g.value).toEqual({"one": "111", "nested" : {"two": "222"}});

          g.controls["nested"].controls["two"].updateValue("333");

          expect(g.value).toEqual({"one": "111", "nested" : {"two": "333"}});
        });
      });

      describe("validator", () => {
        it("should run the validator with the initial value (valid)", () => {
          var g = new ControlGroup({
            "one": new Control('value', Validators.required)
          });

          expect(g.valid).toEqual(true);

          expect(g.errors).toEqual(null);
        });

        it("should run the validator with the initial value (invalid)", () => {
          var one = new Control(null, Validators.required);
          var g = new ControlGroup({"one": one});

          expect(g.valid).toEqual(false);

          expect(g.errors).toEqual({"required": [one]});
        });

        it("should run the validator with the value changes", () => {
          var c = new Control(null, Validators.required);
          var g = new ControlGroup({"one": c});

          c.updateValue("some value");

          expect(g.valid).toEqual(true);
          expect(g.errors).toEqual(null);
        });
      });

      describe("pristine", () => {
        it("should be true after creating a control", () => {
          var c = new Control('value');
          var g = new ControlGroup({"one": c});

          expect(g.pristine).toEqual(true);
        });

        it("should be false after changing the value of the control", () => {
          var c = new Control('value');
          var g = new ControlGroup({"one": c});
          c.updateValue('new value');

          expect(g.pristine).toEqual(false);
        });
      });

      describe("optional components", () => {
        describe("contains", () => {
          var group;

          beforeEach(() => {
            group = new ControlGroup({
              "required": new Control("requiredValue"),
              "optional": new Control("optionalValue")
            }, {
              "optional": false
            });
          });

          // rename contains into has
          it("should return false when the component is not included", () => {
            expect(group.contains("optional")).toEqual(false);
          })

          it("should return false when there is no component with the given name", () => {
            expect(group.contains("something else")).toEqual(false);
          });

          it("should return true when the component is included", () => {
            expect(group.contains("required")).toEqual(true);

            group.include("optional");

            expect(group.contains("optional")).toEqual(true);
          });
        });

        it("should not include an inactive component into the group value", () => {
          var group = new ControlGroup({
            "required": new Control("requiredValue"),
            "optional": new Control("optionalValue")
          }, {
            "optional": false
          });

          expect(group.value).toEqual({"required" : "requiredValue"});

          group.include("optional");

          expect(group.value).toEqual({"required" : "requiredValue", "optional" : "optionalValue"});
        });

        it("should not run Validators on an inactive component", () => {
          var group = new ControlGroup({
            "required": new Control("requiredValue", Validators.required),
            "optional": new Control("", Validators.required)
          }, {
            "optional": false
          });

          expect(group.valid).toEqual(true);

          group.include("optional");

          expect(group.valid).toEqual(false);
        });
      });

      describe("valueChanges", () => {
        describe("Control", () => {
          var c;

          beforeEach(() => {
            c = new Control("old");
          });

          it("should fire an event after the value has been updated",  inject([AsyncTestCompleter], (async) => {
            ObservableWrapper.subscribe(c.valueChanges, (value) => {
              expect(c.value).toEqual('new');
              expect(value).toEqual('new');
              async.done();
            });
            c.updateValue("new");
          }));

          it("should return a cold observable",  inject([AsyncTestCompleter], (async) => {
            c.updateValue("will be ignored");
            ObservableWrapper.subscribe(c.valueChanges, (value) => {
              expect(value).toEqual('new');
              async.done();
            });
            c.updateValue("new");
          }));
        });

        describe("ControlGroup", () => {
          var g, c1, c2;

          beforeEach(() => {
            c1 = new Control("old1");
            c2 = new Control("old2")
            g = new ControlGroup({
              "one" : c1, "two" : c2
            }, {
              "two" : true
            });
          });

          it("should fire an event after the value has been updated", inject([AsyncTestCompleter], (async) => {
            ObservableWrapper.subscribe(g.valueChanges, (value) => {
              expect(g.value).toEqual({'one' : 'new1', 'two' : 'old2'});
              expect(value).toEqual({'one' : 'new1', 'two' : 'old2'});
              async.done();
            });
            c1.updateValue("new1");
          }));

          it("should fire an event after the control's observable fired an event", inject([AsyncTestCompleter], (async) => {
            var controlCallbackIsCalled = false;

            ObservableWrapper.subscribe(c1.valueChanges, (value) => {
              controlCallbackIsCalled = true;
            });

            ObservableWrapper.subscribe(g.valueChanges, (value) => {
              expect(controlCallbackIsCalled).toBe(true);
              async.done();
            });

            c1.updateValue("new1");
          }));

          it("should fire an event when a control is excluded", inject([AsyncTestCompleter], (async) => {
            ObservableWrapper.subscribe(g.valueChanges, (value) => {
              expect(value).toEqual({'one' : 'old1'});
              async.done();
            });

            g.exclude("two");
          }));

          it("should fire an event when a control is included", inject([AsyncTestCompleter], (async) => {
            g.exclude("two");

            ObservableWrapper.subscribe(g.valueChanges, (value) => {
              expect(value).toEqual({'one' : 'old1', 'two' : 'old2'});
              async.done();
            });

            g.include("two");
          }));

          it("should fire an event every time a control is updated", inject([AsyncTestCompleter], (async) => {
            var loggedValues = [];

            ObservableWrapper.subscribe(g.valueChanges, (value) => {
              ListWrapper.push(loggedValues, value);

              if (loggedValues.length == 2) {
                expect(loggedValues).toEqual([
                  {"one" : "new1", "two" : "old2"},
                  {"one" : "new1", "two" : "new2"}
                ])
                async.done();
              }
            });

            c1.updateValue("new1");
            c2.updateValue("new2");
          }));

          xit("should not fire an event when an excluded control is updated", inject([AsyncTestCompleter], (async) => {
            // hard to test without hacking zones
          }));
        });
      });
    });
  });
}