feat(forms): Implement a way to manually set errors on a control

Example:

var login = new Control("someLogin");
c.setErrors({"notUnique": true});
expect(c.valid).toEqual(false);
expect(c.errors).toEqual({"notUnique": true});

c.updateValue("newLogin");
expect(c.valid).toEqual(true);

BREAKING CHANGE:

Before:

ControlGroup.errors and ControlArray.errors returned a reduced value of their children controls' errors.

After:

ControlGroup.errors and ControlArray.errors return the errors of the group and array.
And ControlGroup.controlsErrors and ControlArray.controlsErrors return the reduce value of their children controls' errors.

Closes #4917

modules/angular2/test/public_api_spec.ts

@@ -43,9 +43,11 @@ var NG_API = [
   'AbstractControl',
   'AbstractControl.dirty',
   'AbstractControl.errors',
+  'AbstractControl.controlsErrors',
   'AbstractControl.find()',
   'AbstractControl.getError()',
   'AbstractControl.hasError()',
+  'AbstractControl.setErrors()',
   'AbstractControl.markAsDirty()',
   'AbstractControl.markAsPending()',
   'AbstractControl.markAsTouched()',
@@ -55,7 +57,6 @@ var NG_API = [
   'AbstractControl.status',
   'AbstractControl.touched',
   'AbstractControl.untouched',
-  'AbstractControl.updateValidity()',
   'AbstractControl.updateValueAndValidity()',
   'AbstractControl.valid',
   'AbstractControl.validator',
@@ -66,6 +67,7 @@ var NG_API = [
   'AbstractControlDirective.control',
   'AbstractControlDirective.dirty',
   'AbstractControlDirective.errors',
+  'AbstractControlDirective.controlsErrors',
   'AbstractControlDirective.pristine',
   'AbstractControlDirective.touched',
   'AbstractControlDirective.untouched',
@@ -276,6 +278,7 @@ var NG_API = [
   'Control',
   'Control.dirty',
   'Control.errors',
+  'Control.controlsErrors',
   'Control.find()',
   'Control.getError()',
   'Control.hasError()',
@@ -289,7 +292,6 @@ var NG_API = [
   'Control.status',
   'Control.touched',
   'Control.untouched',
-  'Control.updateValidity()',
   'Control.updateValue()',
   'Control.updateValueAndValidity()',
   'Control.valid',
@@ -297,12 +299,14 @@ var NG_API = [
   'Control.validator=',
   'Control.value',
   'Control.valueChanges',
+  'Control.setErrors()',
   'ControlArray',
   'ControlArray.at()',
   'ControlArray.controls',
   'ControlArray.controls=',
   'ControlArray.dirty',
   'ControlArray.errors',
+  'ControlArray.controlsErrors',
   'ControlArray.find()',
   'ControlArray.getError()',
   'ControlArray.hasError()',
@@ -319,17 +323,18 @@ var NG_API = [
   'ControlArray.status',
   'ControlArray.touched',
   'ControlArray.untouched',
-  'ControlArray.updateValidity()',
   'ControlArray.updateValueAndValidity()',
   'ControlArray.valid',
   'ControlArray.validator',
   'ControlArray.validator=',
   'ControlArray.value',
   'ControlArray.valueChanges',
+  'ControlArray.setErrors()',
   'ControlContainer',
   'ControlContainer.control',
   'ControlContainer.dirty',
   'ControlContainer.errors',
+  'ControlContainer.controlsErrors',
   'ControlContainer.formDirective',
   'ControlContainer.name',
   'ControlContainer.name=',
@@ -346,6 +351,7 @@ var NG_API = [
   'ControlGroup.controls=',
   'ControlGroup.dirty',
   'ControlGroup.errors',
+  'ControlGroup.controlsErrors',
   'ControlGroup.exclude()',
   'ControlGroup.find()',
   'ControlGroup.getError()',
@@ -361,13 +367,13 @@ var NG_API = [
   'ControlGroup.status',
   'ControlGroup.touched',
   'ControlGroup.untouched',
-  'ControlGroup.updateValidity()',
   'ControlGroup.updateValueAndValidity()',
   'ControlGroup.valid',
   'ControlGroup.validator',
   'ControlGroup.validator=',
   'ControlGroup.value',
   'ControlGroup.valueChanges',
+  'ControlGroup.setErrors()',
   'CurrencyPipe',
   'CurrencyPipe.transform()',
   'CyclicDependencyError',
@@ -622,6 +628,7 @@ var NG_API = [
   'NgControl.control',
   'NgControl.dirty',
   'NgControl.errors',
+  'NgControl.controlsErrors',
   'NgControl.name',
   'NgControl.name=',
   'NgControl.path',
@@ -638,6 +645,7 @@ var NG_API = [
   'NgControlGroup.control',
   'NgControlGroup.dirty',
   'NgControlGroup.errors',
+  'NgControlGroup.controlsErrors',
   'NgControlGroup.formDirective',
   'NgControlGroup.name',
   'NgControlGroup.name=',
@@ -660,6 +668,7 @@ var NG_API = [
   'NgControlName.control',
   'NgControlName.dirty',
   'NgControlName.errors',
+  'NgControlName.controlsErrors',
   'NgControlName.formDirective',
   'NgControlName.model',
   'NgControlName.model=',
@@ -694,6 +703,7 @@ var NG_API = [
   'NgForm.controls',
   'NgForm.dirty',
   'NgForm.errors',
+  'NgForm.controlsErrors',
   'NgForm.form',
   'NgForm.form=',
   'NgForm.formDirective',
@@ -717,6 +727,7 @@ var NG_API = [
   'NgFormControl.control',
   'NgFormControl.dirty',
   'NgFormControl.errors',
+  'NgFormControl.controlsErrors',
   'NgFormControl.form',
   'NgFormControl.form=',
   'NgFormControl.model',
@@ -748,6 +759,7 @@ var NG_API = [
   'NgFormModel.directives=',
   'NgFormModel.dirty',
   'NgFormModel.errors',
+  'NgFormModel.controlsErrors',
   'NgFormModel.form',
   'NgFormModel.form=',
   'NgFormModel.formDirective',
@@ -774,6 +786,7 @@ var NG_API = [
   'NgModel.control',
   'NgModel.dirty',
   'NgModel.errors',
+  'NgModel.controlsErrors',
   'NgModel.model',
   'NgModel.model=',
   'NgModel.name',