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FastAPI Backend Test Suite - Summary

Overview

Comprehensive test suite for Issue #48: FastAPI backend with JWT authentication and strategies CRUD endpoints.

Test-Driven Development (TDD) Status: RED Phase ✗

Tests written BEFORE implementation to drive development and ensure quality.

Test Statistics

Total Tests: 208
Failed: 155 (expected - no implementation yet)
Skipped: 37 (waiting for imports)
Passed: 16 (placeholder tests)

Test Files Created

1. tests/api/conftest.py

Shared fixtures for all API tests:

Database fixtures (async SQLAlchemy with SQLite in-memory)
FastAPI client (httpx.AsyncClient)
Authentication fixtures (test users, JWT tokens)
Strategy fixtures (test data, multiple strategies)
Security test payloads (SQL injection, XSS)

2. tests/api/test_auth.py (41 tests)

Password Hashing (6 tests)

Hash generation with Argon2
Hash verification
Salt randomization
Special character handling
Empty string handling

JWT Token Generation (4 tests)

Valid token creation
Expiration claim inclusion
Custom expiration times
Custom claims support

JWT Token Validation (4 tests)

Valid token decoding
Expired token rejection
Invalid signature detection
Malformed token handling

Login Endpoint (8 tests)

Valid credentials authentication
Invalid username handling
Invalid password handling
Missing field validation
Empty credentials handling
User info in response
JWT token format validation

Protected Endpoints (6 tests)

Request without token (401)
Request with valid token (200)
Expired token rejection
Invalid token rejection
Malformed header handling
User context extraction

Edge Cases (7 tests)

Case-sensitive username
SQL injection prevention
Very long username/password
Concurrent logins
Tampered payload detection
Multiple authorization headers
Bearer scheme case insensitivity

Security (6 tests)

User existence leak prevention
Password not in responses
Timing attack resistance
Token logging prevention
Rate limiting on login

3. tests/api/test_strategies.py (95 tests)

List Strategies (7 tests)

Authentication required
Empty list handling
User's strategies returned
User isolation (can't see other's strategies)
Pagination support
Skip/offset parameters
Ordering consistency

Create Strategy (10 tests)

Authentication required
Successful creation
User ID association
Minimal required fields
JSON parameters support
Field validation
Empty name rejection
Very long name handling
Duplicate names allowed
Location header

Get Single Strategy (5 tests)

Authentication required
Successful retrieval
Not found (404)
Unauthorized access (user isolation)
Invalid ID format

Update Strategy (8 tests)

Authentication required
Successful update
Partial updates
Not found handling
Unauthorized access
Validation
Parameters update
Active/inactive toggle

Delete Strategy (6 tests)

Authentication required
Successful deletion
Not found handling
Unauthorized access
Idempotent deletion
Cascade behavior

Edge Cases (11 tests)

SQL injection prevention
XSS payload handling
Unicode characters
Null parameters
Deeply nested JSON
Large JSON parameters
Concurrent creation
Update race conditions
Pagination boundaries
ID overflow

Performance (2 tests)

List response time
Create response time

4. tests/api/test_middleware.py (48 tests)

Error Handling (7 tests)

404 format consistency
422 validation error detail
401 unauthorized format
500 internal error handling
Timestamp in errors
No stack trace leaks
Correct Content-Type

Exception Handlers (3 tests)

HTTPException handling
ValidationError handling
Generic exception handling

Request Logging (3 tests)

Success logging
Error logging
Sensitive data exclusion

CORS (3 tests)

Preflight requests
CORS headers on response
Credentials configuration

Request ID (2 tests)

Request ID in headers
Request ID propagation

Rate Limiting (3 tests)

Normal rate allowed
Rate limit headers
Excessive requests blocked

Content Negotiation (3 tests)

JSON accepted
JSON response type
Unsupported media type rejected

Edge Cases (10 tests)

Very large request body
Malformed JSON
Empty request body
Null request body
Concurrent requests
Special characters in URL
Very long URL paths
Header injection prevention

Security (4 tests)

Security headers present
Server version not leaked
Error messages sanitized
Method not allowed handling

5. tests/api/test_models.py (45 tests)

User Model (7 tests)

Create user with required fields
Unique username constraint
Unique email constraint
Timestamps (created_at, updated_at)
Optional full_name
Default is_active
Strategies relationship

Strategy Model (9 tests)

Create strategy
JSON parameters support
Empty parameters
Null parameters
Default is_active
Timestamps
Updated_at changes on update
Foreign key constraint
Cascade delete

Model Validation (3 tests)

User required fields
Strategy required fields
Email format (API-level validation)

Complex Queries (6 tests)

Query by username
Query by email
Strategies by user
Active strategies only
Order by created_at
Pagination

Edge Cases (3 tests)

Very long username
Unicode in name/description
Deeply nested JSON parameters

6. tests/api/test_config.py (24 tests)

Settings Loading (3 tests)

Load from environment
Default values
Required fields validation

JWT Configuration (4 tests)

Secret key from env
Algorithm configuration
Expiration minutes
Minimum key length

Database Configuration (3 tests)

URL from environment
SQLite default
URL validation

CORS Configuration (3 tests)

Origins from environment
Allow credentials
Wildcard origin

Environment Settings (3 tests)

Debug mode in development
Debug mode in production
Log level configuration

Settings Integration (2 tests)

Singleton pattern
Dependency injection

Edge Cases (6 tests)

Empty JWT secret
Negative expiration
Very large expiration
Malformed database URL
Unicode in config values

7. tests/api/test_migrations.py (32 tests)

Migration Files (5 tests)

Alembic directory exists
alembic.ini exists
Initial migration exists
upgrade() function present
downgrade() function present

Migration Execution (4 tests)

Upgrade to head
Downgrade to base
Upgrade/downgrade idempotent
Data preservation

Schema Validation (6 tests)

Users table exists
Strategies table exists
Users table columns
Strategies table columns
Username unique constraint
Foreign key constraint

Migration History (4 tests)

Linear history
Unique revision IDs
Valid down_revision references
No duplicates

Edge Cases (4 tests)

Empty database
Rollback on error
Concurrent migrations
Partial migration recovery

Alembic Commands (4 tests)

alembic current
alembic history
alembic heads
alembic branches

Documentation (3 tests)

Migration docstrings
Meaningful descriptions
Alembic README

Key Testing Patterns

Arrange-Act-Assert

All tests follow AAA pattern:

# Arrange: Setup test data
user_data = {"username": "test", "password": "pass"}

# Act: Execute functionality
response = await client.post("/api/v1/auth/login", json=user_data)

# Assert: Verify results
assert response.status_code == 200
assert "access_token" in response.json()

Async Testing

All integration tests use async/await:

@pytest.mark.asyncio
async def test_example(client, auth_headers):
    response = await client.get("/api/v1/strategies", headers=auth_headers)
    assert response.status_code == 200

Fixture Composition

Tests compose multiple fixtures:

async def test_strategy_access(client, test_user, test_strategy, auth_headers):
    # All fixtures injected and ready to use

Security Testing Coverage

SQL Injection: Tests with common SQL injection payloads
XSS Prevention: Tests with script tags and JavaScript
Authentication: JWT validation, expiration, tampering
Authorization: User isolation, unauthorized access
Rate Limiting: Excessive request handling
Information Leakage: No stack traces, user existence, passwords
Timing Attacks: Constant-time password verification

Next Steps for Implementation

Install dependencies (FastAPI, SQLAlchemy, Alembic, etc.)
Create database models (User, Strategy)
Setup async database engine
Implement authentication service (password hashing, JWT)
Create API endpoints (auth, strategies)
Add middleware (error handling, logging)
Setup Alembic migrations
Run tests to achieve GREEN phase
Refactor for code quality

Expected Test Results After Implementation

208 tests PASSING
0 tests FAILING
Code coverage: 80%+

Files Created

tests/api/
├── __init__.py
├── conftest.py           # Shared fixtures
├── test_auth.py          # Authentication tests (41)
├── test_strategies.py    # Strategies CRUD tests (95)
├── test_middleware.py    # Middleware tests (48)
├── test_models.py        # Database model tests (45)
├── test_config.py        # Configuration tests (24)
├── test_migrations.py    # Alembic migration tests (32)
├── README.md            # Test documentation
└── TEST_SUMMARY.md      # This file

Running Tests

# Run all API tests
pytest tests/api/ --tb=line -q

# Run with verbose output
pytest tests/api/ -v

# Run specific test file
pytest tests/api/test_auth.py -v

# Run with coverage report
pytest tests/api/ --cov=tradingagents.api --cov-report=html

# Current status (RED phase)
pytest tests/api/ --tb=line -q
# Output: 155 failed, 16 passed, 37 skipped

Test Coverage Matrix

Component	Unit Tests	Integration Tests	Edge Cases	Security Tests
Authentication	✓	✓	✓	✓
Strategies CRUD	✓	✓	✓	✓
Database Models	✓	✓	✓	-
Middleware	-	✓	✓	✓
Configuration	✓	✓	✓	-
Migrations	✓	✓	✓	-

Conclusion

This test suite provides comprehensive coverage for the FastAPI backend implementation. Tests are written following TDD principles and will guide the implementation to ensure:

Correctness: All features work as specified
Security: Authentication, authorization, and input validation
Reliability: Error handling and edge cases
Performance: Response time validation
Maintainability: Clear test structure and documentation

The RED phase is complete. Ready for implementation to achieve GREEN phase.

11 KiB Raw Blame History