test(@angular-devkit/build-angular): refactor server builder tests to use test harness

Author: alan-agius4

packages/angular_devkit/build_angular/src/server/base_spec.ts

@@ -0,0 +1,44 @@
+/**
+ * @license
+ * Copyright Google LLC 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 { execute } from '../../index';
+import { BASE_OPTIONS, SERVER_BUILDER_INFO, describeBuilder } from '../setup';
+
+describeBuilder(execute, SERVER_BUILDER_INFO, (harness) => {
+  describe('Behavior: "Errors"', () => {
+    it('should not try to resolve web-workers', async () => {
+      harness.useTarget('test', {
+        ...BASE_OPTIONS,
+      });
+
+      await harness.writeFiles({
+        'src/app/app.worker.ts': `
+          /// <reference lib="webworker" />
+  
+          const foo: string = 'hello world';
+          addEventListener('message', ({ data }) => {
+            postMessage(foo);
+          });
+        `,
+        'src/main.server.ts': `
+          if (typeof Worker !== 'undefined') {
+            const worker = new Worker(new URL('./app/app.worker', import.meta.url), { type: 'module' });
+            worker.onmessage = ({ data }) => {
+              console.log('page got message:', data);
+            };
+            worker.postMessage('hello');
+          }
+        `,
+      });
+
+      const { result } = await harness.executeOnce();
+
+      expect(result?.success).toBeTrue();
+    });
+  });
+});

packages/angular_devkit/build_angular/src/server/external_dependencies_spec.ts

@@ -0,0 +1,38 @@
+/**
+ * @license
+ * Copyright Google LLC 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 { execute } from '../../index';
+import { BASE_OPTIONS, SERVER_BUILDER_INFO, describeBuilder } from '../setup';
+
+describeBuilder(execute, SERVER_BUILDER_INFO, (harness) => {
+  describe('Option: "externalDependencies"', () => {
+    it(`should not bundle dependency when set "externalDependencies" is set.`, async () => {
+      harness.useTarget('server', {
+        ...BASE_OPTIONS,
+        externalDependencies: ['@angular/core'],
+      });
+
+      const { result } = await harness.executeOnce();
+      expect(result?.success).toBe(true);
+
+      harness.expectFile('dist/main.js').content.toContain('require("@angular/core")');
+      harness.expectFile('dist/main.js').content.not.toContain('require("@angular/common")');
+    });
+
+    it(`should bundle all dependencies when "externalDependencies" is unset`, async () => {
+      harness.useTarget('server', {
+        ...BASE_OPTIONS,
+      });
+
+      const { result } = await harness.executeOnce();
+      expect(result?.success).toBe(true);
+      harness.expectFile('dist/main.js').content.not.toContain('require("@angular/core")');
+      harness.expectFile('dist/main.js').content.not.toContain('require("@angular/common")');
+    });
+  });
+});