feat: add .ngsummary.ts files to support AOT unit tests

Design doc: https://docs.google.com/document/d/1VmTkz0EbEVSWfEEWEvQ5sXyQXSCvtMOw4t7pKU-jOwc/edit?usp=sharing

packages/compiler-cli/integrationtest/src/jit_summaries.html

@@ -0,0 +1 @@
+Hello world!

packages/compiler-cli/integrationtest/src/jit_summaries.ts

@@ -0,0 +1,52 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {Component, Directive, Injectable, NgModule, Pipe} from '@angular/core';
+
+const instances = new Map<any, Base>();
+
+export function expectInstanceCreated(type: any) {
+  const instance = instances.get(type) !;
+  expect(instance).toBeDefined();
+  expect(instance.dep instanceof SomeDep).toBe(true);
+}
+
+export class SomeDep {}
+
+export class Base {
+  constructor(public dep: SomeDep) { instances.set(Object.getPrototypeOf(this).constructor, this); }
+}
+
+@Component({templateUrl: './jit_summaries.html'})
+export class SomePrivateComponent extends Base {
+}
+
+@Component({templateUrl: './jit_summaries.html'})
+export class SomePublicComponent extends Base {
+}
+
+@Directive({selector: '[someDir]'})
+export class SomeDirective extends Base {
+}
+
+@Pipe({name: 'somePipe'})
+export class SomePipe extends Base {
+  transform(value: any) { return value; }
+}
+
+@Injectable()
+export class SomeService extends Base {
+}
+
+@NgModule({
+  declarations: [SomePublicComponent, SomePrivateComponent, SomeDirective, SomePipe],
+  exports: [SomeDirective, SomePipe, SomePublicComponent],
+  providers: [SomeService]
+})
+export class SomeModule extends Base {
+}

packages/compiler-cli/integrationtest/src/module.ts

@@ -28,6 +28,9 @@ import {CompUsingRootModuleDirectiveAndPipe, SomeDirectiveInRootModule, SomeLibM
 import {CompWithNgContent, ProjectingComp} from './projection';
 import {CompForChildQuery, CompWithChildQuery, CompWithDirectiveChild, DirectiveForQuery} from './queries';
 
+// Adding an export here so that TypeScript compiles the file as well
+export {SomeModule as JitSummariesSomeModule} from './jit_summaries';
+
 @NgModule({
   declarations: [
     AnimateCmp,