fix(angular): unify preact signals instance and make tests headless

renderers/angular/a2ui_explorer/src/app/agent-stub.service.spec.ts

@@ -20,7 +20,6 @@ import { A2uiRendererService } from '@a2ui/angular/v0_9';
 import { ActionDispatcher } from './action-dispatcher.service';
 import { Subject } from 'rxjs';
 import { A2uiMessage } from '@a2ui/web_core/v0_9';
-import { vi, describe, it, expect, beforeEach } from 'vitest';
 
 describe('AgentStubService', () => {
   let service: AgentStubService;
@@ -30,10 +29,10 @@ describe('AgentStubService', () => {
 
   beforeEach(() => {
     mockSurfaceGroup = {
-      getSurface: vi.fn(),
+      getSurface: jasmine.createSpy('getSurface'),
     };
     mockRendererService = {
-      processMessages: vi.fn(),
+      processMessages: jasmine.createSpy('processMessages'),
       get surfaceGroup() {
         return mockSurfaceGroup;
       },
@@ -69,28 +68,30 @@ describe('AgentStubService', () => {
       const messages = [createMsg];
 
       // 1. First call: Surface does not exist
-      mockSurfaceGroup.getSurface.mockReturnValue(undefined);
+      mockSurfaceGroup.getSurface.and.returnValue(undefined);
       service.initializeDemo(messages);
 
       // Should have called processMessages with initial messages only
       expect(mockRendererService.processMessages).toHaveBeenCalledWith(messages);
       expect(mockRendererService.processMessages).toHaveBeenCalledTimes(1);
-      mockRendererService.processMessages.mockClear();
+      mockRendererService.processMessages.calls.reset();
 
       // 2. Second call: Surface now exists
-      mockSurfaceGroup.getSurface.mockReturnValue({ id: surfaceId });
+      mockSurfaceGroup.getSurface.and.returnValue({ id: surfaceId });
       service.initializeDemo(messages);
 
       // Should have called processMessages twice:
       // First with deleteSurface, then with initial messages
-      expect(mockRendererService.processMessages).toHaveBeenCalledTimes(2);
-      expect(mockRendererService.processMessages).toHaveBeenNthCalledWith(1, [
+      const deleteMessages = [
         {
-          version: 'v0.9',
+          version: 'v0.9' as const,
           deleteSurface: { surfaceId },
         },
+      ];
+      expect(mockRendererService.processMessages.calls.allArgs()).toEqual([
+        [deleteMessages],
+        [messages],
       ]);
-      expect(mockRendererService.processMessages).toHaveBeenNthCalledWith(2, messages);
     });
 
     it('should NOT send deleteSurface if surface does not exist', () => {
@@ -104,7 +105,7 @@ describe('AgentStubService', () => {
       };
       const messages = [createMsg];
 
-      mockSurfaceGroup.getSurface.mockReturnValue(undefined);
+      mockSurfaceGroup.getSurface.and.returnValue(undefined);
       service.initializeDemo(messages);
 
       expect(mockRendererService.processMessages).toHaveBeenCalledTimes(1);

renderers/angular/angular.json

@@ -23,7 +23,8 @@
         "test": {
           "builder": "@angular/build:karma",
           "options": {
-            "tsConfig": "./tsconfig.spec.json"
+            "tsConfig": "./tsconfig.spec.json",
+            "karmaConfig": "karma.conf.js"
           }
         }
       }

renderers/angular/karma-custom.conf.js

@@ -0,0 +1,26 @@
+/**
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+module.exports = function (config) {
+  config.set({
+    hostname: '127.0.0.1',
+    listenAddress: '127.0.0.1',
+    captureTimeout: 210000, // 3.5 minutes
+    browserNoActivityTimeout: 210000,
+    browserDisconnectTimeout: 10000,
+    browserDisconnectTolerance: 3,
+  });
+};

renderers/angular/karma.conf.js

@@ -0,0 +1,56 @@
+/**
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Karma configuration file, see link for more information
+// https://karma-runner.github.io/1.0/config/configuration-file.html
+
+module.exports = function (config) {
+  config.set({
+    basePath: '',
+    frameworks: ['jasmine'],
+    plugins: [
+      require('karma-jasmine'),
+      require('karma-chrome-launcher'),
+      require('karma-jasmine-html-reporter'),
+      require('karma-coverage'),
+    ],
+    client: {
+      jasmine: {
+        // you can add configuration options for Jasmine here
+        // the possible options are listed at https://jasmine.github.io/api/edge/Configuration.html
+        // for example, you can disable the random execution with `random: false`
+        // or set a specific seed with `seed: 4321`
+      },
+    },
+    jasmineHtmlReporter: {
+      suppressAll: true, // removes the duplicated traces
+    },
+    coverageReporter: {
+      dir: require('path').join(__dirname, './coverage/lib'),
+      subdir: '.',
+      reporters: [{ type: 'html' }, { type: 'text-summary' }],
+    },
+    reporters: ['progress', 'kjhtml'],
+    browsers: ['Chrome'],
+    restartOnFileChange: true,
+    hostname: '127.0.0.1',
+    listenAddress: '127.0.0.1',
+    captureTimeout: 210000,
+    browserNoActivityTimeout: 210000,
+    browserDisconnectTimeout: 10000,
+    browserDisconnectTolerance: 3,
+  });
+};