Add comprehensive e2e tests with Playwright

tests/e2e/test_auth.py

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+import pytest
+from playwright.sync_api import expect, Page
+
+
+def test_login_page(page: Page):
+    # Navigate to login page
+    page.goto("http://localhost:8000/accounts/login/")
+
+    # Check login form elements
+    expect(page.get_by_label("Username")).to_be_visible()
+    expect(page.get_by_label("Password")).to_be_visible()
+    expect(page.get_by_role("button", name="Sign In")).to_be_visible()
+
+    # Check social login buttons
+    expect(page.get_by_role("link", name="Sign in with Google")).to_be_visible()
+    expect(page.get_by_role("link", name="Sign in with Discord")).to_be_visible()
+
+
+def test_successful_login(page: Page):
+    # Navigate to login page
+    page.goto("http://localhost:8000/accounts/login/")
+
+    # Fill in login form
+    page.get_by_label("Username").fill("testuser")
+    page.get_by_label("Password").fill("testpass123")
+
+    # Click login button
+    page.get_by_role("button", name="Sign In").click()
+
+    # Verify redirect to home page
+    expect(page).to_have_url("http://localhost:8000/")
+    expect(page.get_by_role("link", name="Profile")).to_be_visible()
+
+
+def test_failed_login(page: Page):
+    # Navigate to login page
+    page.goto("http://localhost:8000/accounts/login/")
+
+    # Fill in incorrect credentials
+    page.get_by_label("Username").fill("wronguser")
+    page.get_by_label("Password").fill("wrongpass")
+
+    # Click login button
+    page.get_by_role("button", name="Sign In").click()
+
+    # Verify error message
+    expect(page.get_by_text("Invalid username or password")).to_be_visible()
+
+
+def test_signup_page(page: Page):
+    # Navigate to signup page
+    page.goto("http://localhost:8000/accounts/signup/")
+
+    # Check signup form elements
+    expect(page.get_by_label("Username")).to_be_visible()
+    expect(page.get_by_label("Email")).to_be_visible()
+    expect(page.get_by_label("Password")).to_be_visible()
+    expect(page.get_by_label("Password (again)")).to_be_visible()
+    expect(page.get_by_role("button", name="Sign Up")).to_be_visible()
+
+
+def test_successful_signup(page: Page):
+    # Navigate to signup page
+    page.goto("http://localhost:8000/accounts/signup/")
+
+    # Fill in signup form
+    page.get_by_label("Username").fill("newuser")
+    page.get_by_label("Email").fill("newuser@example.com")
+    page.get_by_label("Password").fill("newpass123")
+    page.get_by_label("Password (again)").fill("newpass123")
+
+    # Click signup button
+    page.get_by_role("button", name="Sign Up").click()
+
+    # Verify redirect to home page
+    expect(page).to_have_url("http://localhost:8000/")
+    expect(page.get_by_role("link", name="Profile")).to_be_visible()
+
+
+def test_logout(page: Page):
+    # First login
+    page.goto("http://localhost:8000/accounts/login/")
+    page.get_by_label("Username").fill("testuser")
+    page.get_by_label("Password").fill("testpass123")
+    page.get_by_role("button", name="Sign In").click()
+
+    # Click logout
+    page.get_by_role("link", name="Logout").click()
+
+    # Verify redirect to home page and logged out state
+    expect(page).to_have_url("http://localhost:8000/")
+    expect(page.get_by_role("link", name="Login")).to_be_visible()