IMPORTANT: Before using any Playwright MCP tools, ensure Chromium is installed. This check should be done ONCE at the start of your testing session, NOT before every test.
How to install auth-tester?
hemangjoshi37a/claude-code-frontend-dev/auth-tester
$curl -o .claude/agents/auth-tester.md https://raw.githubusercontent.com/hemangjoshi37a/claude-code-frontend-dev/HEAD/agents/auth-tester.mdInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Install auth-tester by running `curl -o .claude/agents/auth-tester.md https://raw.githubusercontent.com/hemangjoshi37a/claude-code-frontend-dev/HEAD/agents/auth-tester.md`, then use it for the current task and follow its documentation at https://github.com/hemangjoshi37a/claude-code-frontend-dev.
agents/auth-tester.md
| 1 | # Auth Tester Agent |
| 2 | |
| 3 | ## Agent Purpose |
| 4 | Specialized agent for comprehensive authentication and login flow testing based on login constitutions. |
| 5 | |
| 6 | ## Agent Type |
| 7 | **Subagent Type**: `frontend-dev:auth-tester` |
| 8 | |
| 9 | ## Tools Available |
| 10 | - mcp__playwright__* - All Playwright MCP tools for browser automation |
| 11 | - Read - Read constitution files |
| 12 | - Bash - Execute test scripts |
| 13 | - Grep - Search for patterns |
| 14 | - Glob - Find files |
| 15 | |
| 16 | ## Playwright Browser Management (CRITICAL - READ FIRST) |
| 17 | |
| 18 | **IMPORTANT**: Before using any Playwright MCP tools, ensure Chromium is installed. This check should be done ONCE at the start of your testing session, NOT before every test. |
| 19 | |
| 20 | ### Browser Installation Check (Run ONCE per session) |
| 21 | ```bash |
| 22 | # Check if Chromium is already installed |
| 23 | if ! ls ~/.cache/ms-playwright/chromium-* >/dev/null 2>&1; then |
| 24 | echo "Chromium not found, installing..." |
| 25 | npx playwright install chromium |
| 26 | else |
| 27 | echo "Chromium already installed, skipping installation" |
| 28 | fi |
| 29 | ``` |
| 30 | |
| 31 | ### Rules for Browser Management |
| 32 | 1. **Check ONCE** - Only check/install at the very start of a testing session |
| 33 | 2. **Never reinstall** - If Chromium exists in ~/.cache/ms-playwright/, skip installation completely |
| 34 | 3. **Use MCP tools** - Let MCP Playwright handle browser lifecycle after installation |
| 35 | 4. **Reuse browser** - Keep browser open during testing, close only at end of session |
| 36 | 5. **Session awareness** - If another agent already installed Chromium this session, skip installation |
| 37 | |
| 38 | ### Reference Constitution |
| 39 | See `/templates/playwright/playwright-constitution.json` for full Playwright management configuration. |
| 40 | |
| 41 | --- |
| 42 | |
| 43 | ## Core Responsibilities |
| 44 | |
| 45 | ### 1. Load Login Constitution |
| 46 | Before testing, load the login constitution from `.frontend-dev/auth/login-constitution.json` |
| 47 | |
| 48 | ### 2. Execute Authentication Test Suite |
| 49 | Run comprehensive tests based on the constitution: |
| 50 | - Valid login scenarios |
| 51 | - Invalid credential handling |
| 52 | - Form validation |
| 53 | - Security tests |
| 54 | - Session management |
| 55 | - OAuth/SSO flows (if configured) |
| 56 | - MFA flows (if configured) |
| 57 | |
| 58 | ### 3. Report Results |
| 59 | Provide detailed test results with screenshots and actionable fixes. |
| 60 | |
| 61 | --- |
| 62 | |
| 63 | ## Test Suite Execution |
| 64 | |
| 65 | ### PHASE 1: Pre-Test Setup |
| 66 | |
| 67 | 1. **Load Constitution** |
| 68 | ``` |
| 69 | Read: .frontend-dev/auth/login-constitution.json |
| 70 | Extract: |
| 71 | - Login page URL |
| 72 | - Form selectors |
| 73 | - Success/failure indicators |
| 74 | - Test scenarios |
| 75 | - Credential source (env vars) |
| 76 | ``` |
| 77 | |
| 78 | 2. **Load Credentials** |
| 79 | ``` |
| 80 | From environment variables (NEVER from constitution file): |
| 81 | - TEST_USERNAME / TEST_USER / TEST_EMAIL |
| 82 | - TEST_PASSWORD / TEST_PASS |
| 83 | ``` |
| 84 | |
| 85 | 3. **Navigate to Login Page** |
| 86 | ``` |
| 87 | mcp__playwright__navigate: {constitution.loginPage.url} |
| 88 | mcp__playwright__screenshot: "login-page-initial" |
| 89 | ``` |
| 90 | |
| 91 | ### PHASE 2: Form Validation Tests |
| 92 | |
| 93 | **Test 2.1: Empty Form Submission** |
| 94 | ``` |
| 95 | 1. Leave all fields empty |
| 96 | 2. Click submit button |
| 97 | 3. Verify validation errors appear |
| 98 | 4. Screenshot: "empty-form-validation" |
| 99 | 5. Check for required field indicators |
| 100 | ``` |
| 101 | |
| 102 | **Test 2.2: Invalid Email Format** |
| 103 | ``` |
| 104 | 1. Enter invalid email: "notanemail" |
| 105 | 2. Tab out of field |
| 106 | 3. Verify email format error |
| 107 | 4. Screenshot: "invalid-email-format" |
| 108 | ``` |
| 109 | |
| 110 | **Test 2.3: Password Too Short** |
| 111 | ``` |
| 112 | 1. Enter short password (if minLength configured) |
| 113 | 2. Verify password length error |
| 114 | 3. Screenshot: "password-too-short" |
| 115 | ``` |
| 116 | |
| 117 | **Test 2.4: Email Only (No Password)** |
| 118 | ``` |
| 119 | 1. Enter valid email |
| 120 | 2. Leave password empty |
| 121 | 3. Submit form |
| 122 | 4. Verify password required error |
| 123 | ``` |
| 124 | |
| 125 | ### PHASE 3: Authentication Tests |
| 126 | |
| 127 | **Test 3.1: Invalid Credentials** |
| 128 | ``` |
| 129 | 1. Enter valid format email |
| 130 | 2. Enter wrong password |
| 131 | 3. Submit form |
| 132 | 4. Wait for response |
| 133 | 5. Verify error message appears (from failureIndicators) |
| 134 | 6. Verify still on login page |
| 135 | 7. Screenshot: "invalid-credentials-error" |
| 136 | ``` |
| 137 | |
| 138 | **Test 3.2: Valid Login** |
| 139 | ``` |
| 140 | 1. Enter test username from env |
| 141 | 2. Enter test password from env |
| 142 | 3. Submit form |
| 143 | 4. Wait for navigation or success indicators |
| 144 | 5. Verify redirect to expected URL (successIndicators.redirectUrl) |
| 145 | 6. Verify success elements present |
| 146 | 7. Screenshot: "successful-login" |
| 147 | ``` |
| 148 | |
| 149 | **Test 3.3: Session Persistence** |
| 150 | ``` |
| 151 | 1. Complete valid login |
| 152 | 2. Reload page |
| 153 | 3. Verify still logged in |
| 154 | 4. Check cookies/localStorage for session data |
| 155 | 5. Screenshot: "session-persisted" |
| 156 | ``` |
| 157 | |
| 158 | **Test 3.4: Logout** |
| 159 | ``` |
| 160 | 1. Find logout button/link |
| 161 | 2. Click logout |
| 162 | 3. Verify redirected to login or home |
| 163 | 4. Verify session cleared |
| 164 | 5. Screenshot: "after-logout" |
| 165 | ``` |
| 166 | |
| 167 | ### PHASE 4: Security Tests |
| 168 | |
| 169 | **Test 4.1: CSRF Protection** |
| 170 | ``` |
| 171 | 1. Inspect login form for CSRF token |
| 172 | 2. Verify token is present |
| 173 | 3. Attempt form submission without token |
| 174 | 4. Verify rejection |
| 175 | ``` |
| 176 | |
| 177 | **Test 4.2: SQL Injection Prevention** |
| 178 | ``` |
| 179 | For each payload in constitution.security.tests.sql_injection.payloads: |
| 180 | 1. Enter payload in username field |
| 181 | 2. Submit form |
| 182 | 3. Verify no database error exposed |
| 183 | 4. Verify no unauthorized access |
| 184 | ``` |
| 185 | |
| 186 | **Test 4.3: XSS Prevention** |
| 187 | ``` |
| 188 | For each payload in constitution.security.tests.xss_prevention.payloads: |
| 189 | 1. Enter payload in username field |
| 190 | 2. Submit form |
| 191 | 3. Verify script not executed |
| 192 | 4. Verif |
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