test(ivy): implement ngcc specific version of `makeProgram` (#24897)

PR Close #24897

packages/compiler-cli/src/ngcc/test/helpers/utils.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 * as ts from 'typescript';
+import {makeProgram as _makeProgram} from '../../../ngtsc/testing/in_memory_typescript';
+
+export {getDeclaration} from '../../../ngtsc/testing/in_memory_typescript';
+
+export function makeProgram(...files: {name: string, contents: string}[]): ts.Program {
+  return _makeProgram([getFakeCore(), ...files], {allowJs: true, checkJs: false}).program;
+}
+
+// TODO: unify this with the //packages/compiler-cli/test/ngtsc/fake_core package
+export function getFakeCore() {
+  return {
+    name: 'node_modules/@angular/core/index.ts',
+    contents: `
+      type FnWithArg<T> = (arg?: any) => T;
+
+      function callableClassDecorator(): FnWithArg<(clazz: any) => any> {
+        return null !;
+      }
+
+      function callableParamDecorator(): FnWithArg<(a: any, b: any, c: any) => void> {
+        return null !;
+      }
+
+      function makePropDecorator(): any {
+      }
+
+      export const Component = callableClassDecorator();
+      export const Directive = callableClassDecorator();
+      export const Injectable = callableClassDecorator();
+      export const NgModule = callableClassDecorator();
+
+      export const Input = makePropDecorator();
+
+      export const Inject = callableParamDecorator();
+      export const Self = callableParamDecorator();
+      export const SkipSelf = callableParamDecorator();
+      export const Optional = callableParamDecorator();
+
+      export class InjectionToken {
+        constructor(name: string) {}
+      }
+    `
+  };
+}