Files
TinyTorch/tests/integration/__init__.py
Vijay Janapa Reddi 1aea4b3aba Add MSEBackward and organize comprehensive test suite
New Features:
- Add MSEBackward gradient computation for regression tasks
- Patch MSELoss in enable_autograd() for gradient tracking
- All 3 loss functions now support autograd: MSE, BCE, CrossEntropy

Test Suite Organization:
- Reorganize tests/ into focused directories
- Create tests/integration/ for cross-module tests
- Create tests/05_autograd/ for autograd edge cases
- Create tests/debugging/ for common student pitfalls
- Add comprehensive tests/README.md explaining test philosophy

Integration Tests:
- Move test_gradient_flow.py to integration/
- 20 comprehensive gradient flow tests
- Tests cover: tensors, layers, activations, losses, optimizers
- Tests validate: basic ops, chain rule, broadcasting, training loops
- 19/20 tests passing (MSE now fixed!)

Results:
 Perceptron learns: 50% → 93% accuracy
 Clean test organization guides future development
 Tests catch the exact bugs that broke training

Pedagogical Value:
- Test organization teaches testing best practices
- Gradient flow tests show what integration testing catches
- Sets foundation for debugging/diagnostic tests
2025-09-30 13:57:40 -04:00

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Python

"""
Integration tests for TinyTorch.
These tests validate that multiple modules work together correctly.
They catch issues that unit tests miss, like:
- Gradient flow through entire training pipelines
- Module compatibility and interface contracts
- End-to-end training scenarios
Critical for catching bugs like:
- Missing autograd integration
- Shape mismatches in broadcasting
- Optimizer parameter updates
"""