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function test_flask_routes

Maturity: 44

A test function that validates Flask application routes are properly configured by checking for required endpoints.

File:
/tf/active/vicechatdev/docchat/test_model_selection.py
Lines:
85 - 107
Complexity:
simple

Purpose

This function is part of a test suite that verifies the Flask web application has been correctly set up with essential routes. It dynamically imports the Flask app module, extracts all registered URL routes, and asserts that critical endpoints (root, chat API, and models API) exist. The function includes error handling to gracefully skip the test if the Flask app cannot be initialized (e.g., due to ChromaDB accessibility issues).

Source Code

def test_flask_routes():
    """Test Flask routes are properly configured"""
    print("=" * 60)
    print("TEST 3: Flask Application Routes")
    print("=" * 60)
    
    # Import app after other tests to avoid initialization errors
    try:
        import app as flask_app
        
        # Check if app has the routes we need
        routes = [rule.rule for rule in flask_app.app.url_map.iter_rules()]
        
        required_routes = ['/', '/api/chat', '/api/models']
        for route in required_routes:
            assert route in routes, f"Missing route: {route}"
            print(f"✓ Route exists: {route}")
        
        print()
    except Exception as e:
        print(f"⚠️  Flask app test skipped due to initialization error: {e}")
        print("   (This is expected if ChromaDB is not accessible)")
        print()

Return Value

This function does not return any value (implicitly returns None). It performs assertions and prints test results to stdout. If assertions fail, it will raise an AssertionError. If the Flask app cannot be imported, it prints a warning message and continues without raising an error.

Dependencies

  • flask
  • chromadb

Required Imports

import sys
import json
import config
from rag_engine import get_llm_instance

Conditional/Optional Imports

These imports are only needed under specific conditions:

import app as flask_app

Condition: imported inside the function within a try-except block to handle initialization errors gracefully

Required (conditional)

Usage Example

# Run the test function directly
test_flask_routes()

# Expected output on success:
# ============================================================
# TEST 3: Flask Application Routes
# ============================================================
# ✓ Route exists: /
# ✓ Route exists: /api/chat
# ✓ Route exists: /api/models
#

# Expected output on failure:
# ============================================================
# TEST 3: Flask Application Routes
# ============================================================
# ⚠️  Flask app test skipped due to initialization error: [error message]
#    (This is expected if ChromaDB is not accessible)
#

Best Practices

  • This function should be run as part of a test suite, not in production code
  • The function uses lazy import of the Flask app to avoid initialization errors in other tests
  • Error handling is intentionally permissive to allow test suite to continue even if Flask app cannot initialize
  • The function assumes specific route names - update required_routes list if API endpoints change
  • Print statements are used for test output rather than logging framework
  • Consider using pytest or unittest framework for more robust test management
  • The function performs side effects (printing) rather than returning test results, making it less suitable for automated test runners

Tags

testing flask routes validation web-application api-testing integration-test url-mapping endpoint-verification

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