feat: add Playwright e2e tests for note linking functionality

.gitignore

@@ -30,3 +30,8 @@ notes-app
 
 # SQLite db
 notes.db
+
+# Playwright
+/test-results/
+/playwright-report/
+/playwright/.cache/

main.go

@@ -86,6 +86,19 @@ func main() {
 	// API routes
 	http.HandleFunc("/api/notes", handleNotes)
 	http.HandleFunc("/api/notes/", handleNote)
+	http.HandleFunc("/api/test/reset", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != "POST" {
+			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+			return
+		}
+		
+		_, err := db.Exec("DELETE FROM notes")
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+	})
 
 	// Serve frontend
 	http.HandleFunc("/", handleFrontend)

package.json

@@ -13,9 +13,13 @@
 		"format": "prettier --write .",
 		"lint": "prettier --check . && eslint .",
 		"test:unit": "vitest",
-		"test": "npm run test:unit -- --run"
+		"test": "npm run test:unit -- --run",
+		"test:e2e": "playwright test",
+		"test:e2e:ui": "playwright test --ui",
+		"test:e2e:headed": "playwright test --headed"
 	},
 	"devDependencies": {
+		"@playwright/test": "^1.42.1",
 		"@eslint/compat": "^1.2.5",
 		"@eslint/js": "^9.18.0",
 		"@sveltejs/adapter-static": "^3.0.8",

playwright.config.ts

@@ -0,0 +1,20 @@
+import { defineConfig, devices } from '@playwright/test';
+
+export default defineConfig({
+  testDir: './tests',
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: 0,
+  workers: 1, // Recommended for test isolation with database
+  reporter: 'html',
+  use: {
+    baseURL: 'http://localhost:3000',
+    trace: 'on',
+  },
+  webServer: {
+    command: 'go run main.go',
+    url: 'http://localhost:3000',
+    reuseExistingServer: !process.env.CI,
+    timeout: 120 * 1000,
+  },
+});

tests/note-linking.spec.ts

@@ -0,0 +1,53 @@
+import { test, expect } from '@playwright/test';
+
+test.beforeEach(async ({ page }) => {
+    // Reset database before each test
+    await page.request.post('/api/test/reset');
+});
+
+test.describe('Note Linking', () => {
+    test('should create new note from broken link', async ({ page }) => {
+        // Create initial note
+        await page.goto('/notes/new');
+        await page.fill('input[name="title"]', 'Parent Note');
+        await page.fill('textarea[name="content"]', 'Content with [[Unlinked Child Note]]');
+        await page.click('button[type="submit"]');
+        
+        // Click the unlinked note
+        await page.click('a.note-link');
+        
+        // Verify new note form with title pre-filled
+        await expect(page).toHaveURL('/notes/new');
+        await expect(page.locator('input[name="title"]')).toHaveValue('Unlinked Child Note');
+        
+        // Create child note
+        await page.fill('textarea[name="content"]', 'Child content');
+        await page.click('button[type="submit"]');
+        
+        // Verify child note creation
+        await expect(page.locator('h1')).toHaveText('Unlinked Child Note');
+        await expect(page.locator('.content')).toContainText('Child content');
+    });
+
+    test('should navigate between linked notes', async ({ page }) => {
+        // Create two linked notes
+        await page.goto('/notes/new');
+        await page.fill('input[name="title"]', 'First Note');
+        await page.fill('textarea[name="content"]', 'Links to [[Second Note]]');
+        await page.click('button[type="submit"]');
+        const firstNoteUrl = page.url();
+        
+        await page.click('a.note-link');
+        await page.fill('textarea[name="content"]', 'Links back to [[First Note]]');
+        await page.click('button[type="submit"]');
+        const secondNoteUrl = page.url();
+        
+        // Verify bidirectional linking
+        await page.goto(firstNoteUrl);
+        await page.click('a.note-link:has-text("Second Note")');
+        await expect(page).toHaveURL(secondNoteUrl);
+        
+        await page.click('a.note-link:has-text("First Note")');
+        await expect(page).toHaveURL(firstNoteUrl);
+    });
+});