Merge pull request #188 from gund/fix-null-comp-injector

[Fix] Make sure no errors thrown when component injector is not available

src/dynamic/dynamic.directive.spec.ts

@@ -161,6 +161,11 @@ describe('Directive: Dynamic', () => {
       expect(() => fixture.detectChanges()).not.toThrow();
     });
 
+    it('should NOT throw if component injector is null', () => {
+      injectorComp.component = null;
+      expect(() => fixture.detectChanges()).not.toThrow();
+    });
+
     it('should call `ngOnChanges` once when inputs and component updated', () => {
       fixture.detectChanges();
       injectorComp.component.ngOnChanges.mockReset();

src/dynamic/io.service.ts

@@ -46,7 +46,7 @@ export class IoService implements OnDestroy {
   }
 
   private get _componentInst() {
-    return this._compRef.instance;
+    return this._compRef ? this._compRef.instance : null;
   }
 
   private get _componentInstChanged(): boolean {

src/test/component-injector.component.ts

@@ -9,9 +9,9 @@ export class ComponentInjectorComponent implements ComponentInjector {
   component = new MockedInjectedComponent();
 
   get componentRef(): ComponentRef<ComponentInjectorComponent> {
-    return {
+    return this.component ? {
       instance: this.component,
-    } as any;
+    } as any : null;
   }
 }