In which cases would you add critical paths?

Critical Path Test Cases:

• Functionality: Main user flow. Testing the primary user scenario from start to finish (e.g., registration -> login -> making a purchase).
• Functionality: Core features. Testing key functions without which the product loses its value (e.g., product search for an online store).
• Security: Authorization and authentication. Verifying correct login, logout, password recovery.
• Performance: Most frequent operations. Testing the performance of the most heavily loaded operations.
• Compatibility: Main supported platforms/browsers. Checking critical paths in the main environments declared as supported.
• Integrations: Key external services. Testing successful interaction with critically important external systems (e.g., payment gateways).
• Data: Input/output of critical data. Verifying correct saving and display of vital data.
• Fault Tolerance: Operation under partial failures. Testing system behavior when non-critical components are unavailable.

# Example user scenario for critical path
def test_successful_purchase_flow(driver):
    # Navigate to site
    driver.get("https://example.com")
    # Login (if required)
    login_user(driver, "test_user", "password")
    # Search for item
    search_item(driver, "laptop")
    # Add to cart
    add_to_cart(driver, "laptop")
    # Go to cart
    go_to_cart(driver)
    # Checkout
    checkout(driver)
    # Verify success
    assert order_successful(driver)