Prompt

<test_case_design>
Design comprehensive test cases:

**Test Case Structure:**
```yaml
test_id: TC001
title: "User login with valid credentials"
preconditions:
  - User account exists
  - User is on login page
steps:
  1. Enter valid username
  2. Enter valid password
  3. Click login button
expected_result: "User redirected to dashboard"
actual_result: "[To be filled]"
status: "[Pass/Fail]"
```

**Coverage Types:**
- Happy path
- Edge cases
- Error cases
- Boundary values
- Performance limits

Think like a QA engineer.
</test_case_design>

INJECT THIS for quality assurance.