Test: add integration tests for template creation and form fill routes

[Arijit429]

Closes #24
Closes #265

🚀 Summary

This PR adds route-level integration tests for the core API workflow to improve backend reliability and strengthen regression safety.

The tests cover the two most critical endpoints in the current pipeline:

• /templates/create
• /forms/fill

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✨ What Changed

Added a new integration test file:

tests/test_api_routes.py

This validates the end-to-end API behavior using FastAPI’s TestClient.

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🧪 Test Coverage Added

1) Template creation route

Verifies successful template creation with valid payload structure and ensures response correctness.

Validated:

• status code = 200
• response contains template name
• template creation flow is functional

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2) Form fill route

Tests the complete workflow:

template create
↓
template id retrieval
↓
form fill request
↓
successful response

This provides strong route-level regression protection for the core extraction pipeline.

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💡 Why This Helps

These tests strengthen:

• API route reliability
• regression safety
• production readiness
• backend workflow confidence

This is especially important for the form generation pipeline since it directly impacts end-user functionality.

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🧪 Local Validation

Executed locally using:

PYTHONPATH=. pytest tests/test_api_routes.py -q

Result:

2 passed

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🎯 Impact

This improves confidence in the application’s most critical routes and makes future refactors significantly safer.

[Arijit429]

Hi maintainers, added integration tests for the core API flow and verified both routes locally—happy to extend coverage for additional edge cases if needed.

[Arijit429]

Hi maintainers, continuing the milestones outlined in my post-proposal contribution plan, I’ve been steadily progressing across extraction reliability, validation workflow, database initialization, and now route-level integration testing to move the project closer to production-ready stability.