refactor(@schematics/angular): Use runInInjectionContext shorthand

The runInInjectionContext helper was added in angular/angular@6acae14.
This is a shorthand for TestBed.inject(EnvironmentInjector).runInContext.

Author: atscott

packages/schematics/angular/guard/index_spec.ts

@@ -109,7 +109,7 @@ describe('Guard Schematic', () => {
     const fileString = tree.readContent('/projects/bar/src/app/foo.guard.spec.ts');
     expect(fileString).toContain('const executeGuard: CanActivateFn = (...guardParameters) => ');
     expect(fileString).toContain(
-      'TestBed.inject(EnvironmentInjector).runInContext(() => fooGuard(...guardParameters));',
+      'TestBed.runInInjectionContext(() => fooGuard(...guardParameters));',
     );
   });
 

packages/schematics/angular/guard/type-files/__name@dasherize__.guard.spec.ts.template

@@ -6,7 +6,7 @@ import { <%= camelize(name) %>Guard } from './<%= dasherize(name) %>.guard';
 
 describe('<%= camelize(name) %>Guard', () => {
   const executeGuard: <%= guardType %> = (...guardParameters) => 
-      TestBed.inject(EnvironmentInjector).runInContext(() => <%= camelize(name) %>Guard(...guardParameters));
+      TestBed.runInInjectionContext(() => <%= camelize(name) %>Guard(...guardParameters));
 
   beforeEach(() => {
     TestBed.configureTestingModule({});

packages/schematics/angular/resolver/functional-files/__name@dasherize__.resolver.spec.ts.template

@@ -5,7 +5,7 @@ import { <%= camelize(name) %>Resolver } from './<%= dasherize(name) %>.resolver
 
 describe('<%= camelize(name) %>Resolver', () => {
   const executeResolver: ResolveFn<boolean> = (...resolverParameters) => 
-      TestBed.inject(EnvironmentInjector).runInContext(() => <%= camelize(name) %>Resolver(...resolverParameters));
+      TestBed.runInInjectionContext(() => <%= camelize(name) %>Resolver(...resolverParameters));
 
   beforeEach(() => {
     TestBed.configureTestingModule({});

packages/schematics/angular/resolver/index_spec.ts

@@ -99,7 +99,7 @@ describe('resolver Schematic', () => {
       'const executeResolver: ResolveFn<boolean> = (...resolverParameters) => ',
     );
     expect(fileString).toContain(
-      'TestBed.inject(EnvironmentInjector).runInContext(() => fooResolver(...resolverParameters));',
+      'TestBed.runInInjectionContext(() => fooResolver(...resolverParameters));',
     );
   });
 });