feat: implement network condition simulation in NetworkSimulator

e2e/src/tests/utils/network-simulator.spec.ts

@@ -0,0 +1,53 @@
+import { test, expect } from '@playwright/test';
+import { NetworkSimulator } from '../../utils/NetworkSimulator';
+import { networkConfigs } from '../../config/network-configs';
+
+test.describe('NetworkSimulator', () => {
+  test('should set 3G network condition', async ({ page, context }) => {
+    const simulator = new NetworkSimulator(context);
+    await simulator.setNetworkCondition(networkConfigs['3g-fast']);
+    
+    await page.goto('/');
+    await expect(page.locator('header')).toBeVisible();
+  });
+  
+  test('should switch to offline mode', async ({ page, context }) => {
+    const simulator = new NetworkSimulator(context);
+    await page.goto('/');
+    
+    await simulator.goOffline();
+    await page.reload();
+    
+    await expect(page.locator('header')).toBeVisible();
+  });
+  
+  test('should switch back to online mode', async ({ page, context }) => {
+    const simulator = new NetworkSimulator(context);
+    await simulator.goOffline();
+    await page.goto('/');
+    
+    await simulator.goOnline();
+    await page.reload();
+    
+    await expect(page.locator('header')).toBeVisible();
+  });
+  
+  test('should simulate network switch', async ({ page, context }) => {
+    const simulator = new NetworkSimulator(context);
+    
+    await simulator.simulateNetworkSwitch(networkConfigs['4g'], networkConfigs['3g-slow']);
+    
+    await page.goto('/');
+    await expect(page.locator('header')).toBeVisible();
+  });
+  
+  test('should reset network condition', async ({ page, context }) => {
+    const simulator = new NetworkSimulator(context);
+    await simulator.setNetworkCondition(networkConfigs['3g-slow']);
+    
+    await simulator.resetNetworkCondition();
+    
+    await page.goto('/');
+    await expect(page.locator('header')).toBeVisible();
+  });
+});

e2e/src/utils/NetworkSimulator.ts

@@ -35,25 +35,74 @@ export class NetworkSimulator {
   }
   
   async setNetworkCondition(config: NetworkConfig): Promise<void> {
+    const page = this.context.pages()[0];
+    if (!page) throw new Error('No page available');
+    
+    const cdpSession = await this.context.newCDPSession(page);
+    
     if (config.offline) {
-      await this.context.setOffline(true);
+      await cdpSession.send('Network.emulateNetworkConditions', {
+        offline: true,
+        downloadThroughput: 0,
+        uploadThroughput: 0,
+        latency: 0,
+      });
     } else {
-      await this.context.setOffline(false);
-      if (config.downloadThroughput && config.uploadThroughput && config.latency) {
-        await this.context.route('**', (route) => {
-          route.continue({
-            headers: {
-              ...route.request().headers(),
-            },
-          });
-        });
-      }
+      await cdpSession.send('Network.emulateNetworkConditions', {
+        offline: false,
+        downloadThroughput: config.downloadThroughput,
+        uploadThroughput: config.uploadThroughput,
+        latency: config.latency,
+      });
     }
   }
   
+  async goOffline(): Promise<void> {
+    const page = this.context.pages()[0];
+    if (!page) throw new Error('No page available');
+    
+    const cdpSession = await this.context.newCDPSession(page);
+    await cdpSession.send('Network.emulateNetworkConditions', {
+      offline: true,
+      downloadThroughput: 0,
+      uploadThroughput: 0,
+      latency: 0,
+    });
+  }
+  
+  async goOnline(): Promise<void> {
+    const page = this.context.pages()[0];
+    if (!page) throw new Error('No page available');
+    
+    const cdpSession = await this.context.newCDPSession(page);
+    await cdpSession.send('Network.emulateNetworkConditions', {
+      offline: false,
+      downloadThroughput: -1,
+      uploadThroughput: -1,
+      latency: 0,
+    });
+  }
+  
+  async simulateNetworkSwitch(fromConfig: NetworkConfig, toConfig: NetworkConfig): Promise<void> {
+    await this.setNetworkCondition(fromConfig);
+    const page = this.context.pages()[0];
+    if (page) {
+      await page.waitForTimeout(1000);
+    }
+    await this.setNetworkCondition(toConfig);
+  }
+  
   async resetNetworkCondition(): Promise<void> {
-    await this.context.setOffline(false);
-    await this.context.unrouteAll();
+    const page = this.context.pages()[0];
+    if (!page) throw new Error('No page available');
+    
+    const cdpSession = await this.context.newCDPSession(page);
+    await cdpSession.send('Network.emulateNetworkConditions', {
+      offline: false,
+      downloadThroughput: -1,
+      uploadThroughput: -1,
+      latency: 0,
+    });
   }
   
   getRequests(): NetworkRequest[] {