Scaling Patterns for BDR (1000+ Tests)

To keep the project fast and maintainable as it grows to hundreds and thousands of tests, BDR dictates the following engineering patterns:

1. Lazy Initialization (Lazy DI)

Problem: “Fixture Hell”. If dozens of objects (Page Objects, Flows) are created at the start of every test, it slows down startup and consumes unnecessary memory.

Solution: Create dependencies only at the moment of their first call.

• In most modern frameworks (Playwright, Pytest), this is implemented via fixtures or hooks that initialize Layer 1 or Layer 2 classes only when the test accesses them.
• This ensures that if a test only needs LoginFlow, the system will not waste resources creating CartFlow, PaymentFlow, etc.

2. API + UI Orchestration

BDR encourages a hybrid approach for stability and speed:

• API for Setup: Creating users, filling the cart, or other mundane actions are done via API (Layer 0/1). It is fast and reliable.
• UI for Verification: Only key business behavior is verified via the browser.
• Unified Report: In the report (e.g., Allure), both types of actions appear as logical steps of a single process.

3. Global Infrastructure Guards

Before running the test suite (Global Setup), BDR recommends confirming the “vitality” of the environment. This is critical for stability and resource saving.

• Fail-fast: If the environment is down, the run fails immediately.
• For details on how this protects against false positives (flakes), read the Anti-Flakiness Guide.