fix(forms): disable all radios with disable()

modules/@angular/forms/src/model.ts

@@ -334,7 +334,7 @@ export abstract class AbstractControl {
     }
 
     this._updateAncestors(onlySelf);
-    this._onDisabledChange(true);
+    this._onDisabledChange.forEach((changeFn) => changeFn(true));
   }
 
   /**
@@ -350,7 +350,7 @@ export abstract class AbstractControl {
     this.updateValueAndValidity({onlySelf: true, emitEvent: emitEvent});
 
     this._updateAncestors(onlySelf);
-    this._onDisabledChange(false);
+    this._onDisabledChange.forEach((changeFn) => changeFn(false));
   }
 
   private _updateAncestors(onlySelf: boolean) {
@@ -595,7 +595,7 @@ export abstract class AbstractControl {
   }
 
   /** @internal */
-  _onDisabledChange(isDisabled: boolean): void {}
+  _onDisabledChange: Function[] = [];
 
   /** @internal */
   _isBoxedValue(formState: any): boolean {
@@ -770,14 +770,16 @@ export class FormControl extends AbstractControl {
    */
   _clearChangeFns(): void {
     this._onChange = [];
-    this._onDisabledChange = null;
+    this._onDisabledChange = [];
     this._onCollectionChange = () => {};
   }
 
   /**
    * Register a listener for disabled events.
    */
-  registerOnDisabledChange(fn: (isDisabled: boolean) => void): void { this._onDisabledChange = fn; }
+  registerOnDisabledChange(fn: (isDisabled: boolean) => void): void {
+    this._onDisabledChange.push(fn);
+  }
 
   /**
    * @internal

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

@@ -1022,6 +1022,54 @@ export function main() {
 
         });
 
+        it('should disable all radio buttons when disable() is called', () => {
+          const fixture = TestBed.createComponent(FormControlRadioButtons);
+          const form =
+              new FormGroup({food: new FormControl('fish'), drink: new FormControl('cola')});
+          fixture.componentInstance.form = form;
+          fixture.detectChanges();
+
+          const inputs = fixture.debugElement.queryAll(By.css('input'));
+          expect(inputs[0].nativeElement.disabled).toEqual(false);
+          expect(inputs[1].nativeElement.disabled).toEqual(false);
+          expect(inputs[2].nativeElement.disabled).toEqual(false);
+          expect(inputs[3].nativeElement.disabled).toEqual(false);
+
+          form.get('food').disable();
+          expect(inputs[0].nativeElement.disabled).toEqual(true);
+          expect(inputs[1].nativeElement.disabled).toEqual(true);
+          expect(inputs[2].nativeElement.disabled).toEqual(false);
+          expect(inputs[3].nativeElement.disabled).toEqual(false);
+
+          form.disable();
+          expect(inputs[0].nativeElement.disabled).toEqual(true);
+          expect(inputs[1].nativeElement.disabled).toEqual(true);
+          expect(inputs[2].nativeElement.disabled).toEqual(true);
+          expect(inputs[3].nativeElement.disabled).toEqual(true);
+
+          form.enable();
+          expect(inputs[0].nativeElement.disabled).toEqual(false);
+          expect(inputs[1].nativeElement.disabled).toEqual(false);
+          expect(inputs[2].nativeElement.disabled).toEqual(false);
+          expect(inputs[3].nativeElement.disabled).toEqual(false);
+        });
+
+        it('should disable all radio buttons when initially disabled', () => {
+          const fixture = TestBed.createComponent(FormControlRadioButtons);
+          const form = new FormGroup({
+            food: new FormControl({value: 'fish', disabled: true}),
+            drink: new FormControl('cola')
+          });
+          fixture.componentInstance.form = form;
+          fixture.detectChanges();
+
+          const inputs = fixture.debugElement.queryAll(By.css('input'));
+          expect(inputs[0].nativeElement.disabled).toEqual(true);
+          expect(inputs[1].nativeElement.disabled).toEqual(true);
+          expect(inputs[2].nativeElement.disabled).toEqual(false);
+          expect(inputs[3].nativeElement.disabled).toEqual(false);
+        });
+
       });
 
       describe('custom value accessors', () => {

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

@@ -445,6 +445,39 @@ export function main() {
            expect(input.nativeElement.disabled).toEqual(false);
          }));
 
+      it('should disable radio controls properly with programmatic call', fakeAsync(() => {
+           const fixture = TestBed.createComponent(NgModelRadioForm);
+           fixture.componentInstance.food = 'fish';
+           fixture.detectChanges();
+           tick();
+
+           const form = fixture.debugElement.children[0].injector.get(NgForm);
+           form.control.get('food').disable();
+           tick();
+
+           const inputs = fixture.debugElement.queryAll(By.css('input'));
+           expect(inputs[0].nativeElement.disabled).toBe(true);
+           expect(inputs[1].nativeElement.disabled).toBe(true);
+           expect(inputs[2].nativeElement.disabled).toBe(false);
+           expect(inputs[3].nativeElement.disabled).toBe(false);
+
+           form.control.disable();
+           tick();
+
+           expect(inputs[0].nativeElement.disabled).toBe(true);
+           expect(inputs[1].nativeElement.disabled).toBe(true);
+           expect(inputs[2].nativeElement.disabled).toBe(true);
+           expect(inputs[3].nativeElement.disabled).toBe(true);
+
+           form.control.enable();
+           tick();
+
+           expect(inputs[0].nativeElement.disabled).toBe(false);
+           expect(inputs[1].nativeElement.disabled).toBe(false);
+           expect(inputs[2].nativeElement.disabled).toBe(false);
+           expect(inputs[3].nativeElement.disabled).toBe(false);
+         }));
+
     });
 
     describe('radio controls', () => {
@@ -928,7 +961,7 @@ class NgModelOptionsStandalone {
     <form>
       <input type="radio" name="food" [(ngModel)]="food" value="chicken">
       <input type="radio" name="food"  [(ngModel)]="food" value="fish">
-      
+
       <input type="radio" name="drink" [(ngModel)]="drink" value="cola">
       <input type="radio" name="drink" [(ngModel)]="drink" value="sprite">
     </form>