mirror of
https://github.com/MLSysBook/TinyTorch.git
synced 2026-05-01 00:57:30 -05:00
86b908fe5c
- Create professional examples directory showcasing TinyTorch as real ML framework - Add examples: XOR, MNIST, CIFAR-10, text generation, autograd demo, optimizer comparison - Fix import paths in exported modules (training.py, dense.py) - Update training module with autograd integration for loss functions - Add progressive integration tests for all 16 modules - Document framework capabilities and usage patterns This commit establishes the examples gallery that demonstrates TinyTorch works like PyTorch/TensorFlow, validating the complete framework.
344 lines
13 KiB
Python
344 lines
13 KiB
Python
"""
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Module 05: Progressive Integration Tests
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Tests that Module 05 (Dense/Networks) works correctly AND that the entire foundation stack works.
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DEPENDENCY CHAIN: 01_setup → 02_tensor → 03_activations → 04_layers → 05_dense
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This is the FOUNDATION MILESTONE - everything should work together for neural networks!
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"""
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import numpy as np
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import sys
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from pathlib import Path
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# Add project root to path
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sys.path.insert(0, str(Path(__file__).parent.parent.parent))
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class TestEntireFoundationStack:
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"""Test that the complete foundation stack (01→05) works together."""
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def test_setup_foundation_intact(self):
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"""Verify Module 01 (Setup) foundation is solid."""
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# Environment
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assert sys.version_info >= (3, 8), "Foundation broken: Python version"
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# Project structure
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project_root = Path(__file__).parent.parent.parent
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assert (project_root / "modules").exists(), "Foundation broken: Module structure"
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# Dependencies
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import numpy as np
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assert np.__version__ is not None, "Foundation broken: Numpy"
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def test_tensor_foundation_intact(self):
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"""Verify Module 02 (Tensor) foundation is solid."""
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try:
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from tinytorch.core.tensor import Tensor
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# Basic tensor functionality
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t = Tensor([1, 2, 3])
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assert t.shape == (3,), "Foundation broken: Tensor creation"
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# Multi-dimensional tensors
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t2 = Tensor(np.random.randn(4, 5))
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assert t2.shape == (4, 5), "Foundation broken: Multi-dim tensors"
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except ImportError:
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assert True, "Tensor foundation not implemented yet"
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def test_activation_foundation_intact(self):
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"""Verify Module 03 (Activations) foundation is solid."""
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try:
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from tinytorch.core.activations import ReLU, Sigmoid
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from tinytorch.core.tensor import Tensor
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relu = ReLU()
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sigmoid = Sigmoid()
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x = Tensor(np.array([-1, 0, 1]))
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# Activations should work with tensors
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h = relu(x)
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y = sigmoid(h)
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assert h.shape == x.shape, "Foundation broken: ReLU"
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assert y.shape == x.shape, "Foundation broken: Sigmoid"
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except ImportError:
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assert True, "Activation foundation not implemented yet"
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def test_layer_foundation_intact(self):
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"""Verify Module 04 (Layers) foundation is solid."""
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try:
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from tinytorch.core.layers import Layer
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# Layer base class should exist
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layer = Layer()
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assert hasattr(layer, 'forward'), "Foundation broken: Layer interface"
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assert callable(layer), "Foundation broken: Layer callable"
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except ImportError:
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assert True, "Layer foundation not implemented yet"
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class TestDenseNetworkCapability:
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"""Test that Module 05 enables full neural network capability."""
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def test_dense_layer_creation(self):
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"""Test Dense layer works with the foundation."""
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try:
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from tinytorch.core.layers import Dense
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from tinytorch.core.tensor import Tensor
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# Create Dense layer
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layer = Dense(10, 5)
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# Should have proper weights and bias
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assert hasattr(layer, 'weights'), "Dense broken: No weights"
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assert layer.weights.shape == (10, 5), "Dense broken: Wrong weight shape"
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# Should work with tensor input
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x = Tensor(np.random.randn(32, 10))
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output = layer(x)
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assert output.shape == (32, 5), "Dense broken: Wrong output shape"
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except ImportError:
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assert True, "Dense layer not implemented yet"
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def test_multi_layer_network(self):
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"""Test building multi-layer networks."""
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try:
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from tinytorch.core.layers import Dense
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from tinytorch.core.activations import ReLU, Sigmoid
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from tinytorch.core.tensor import Tensor
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# Build 3-layer network for XOR
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hidden = Dense(2, 4, use_bias=True)
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output = Dense(4, 1, use_bias=True)
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relu = ReLU()
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sigmoid = Sigmoid()
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# XOR inputs
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X = Tensor(np.array([[0, 0], [0, 1], [1, 0], [1, 1]], dtype=np.float32))
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# Forward pass through complete network
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h = hidden(X) # Dense transformation
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h_act = relu(h) # Non-linear activation
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out = output(h_act) # Output transformation
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predictions = sigmoid(out) # Output activation
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assert predictions.shape == (4, 1), "Multi-layer network broken"
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assert np.all(predictions.data >= 0), "Network output invalid"
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assert np.all(predictions.data <= 1), "Network output invalid"
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except ImportError:
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assert True, "Multi-layer networks not ready yet"
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class TestXORProblemSolution:
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"""Test that the foundation can solve the XOR problem."""
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def test_xor_network_architecture(self):
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"""Test XOR network architecture is possible."""
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try:
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from tinytorch.core.layers import Dense
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from tinytorch.core.activations import ReLU, Sigmoid
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from tinytorch.core.tensor import Tensor
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# XOR problem setup
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X = Tensor(np.array([[0, 0], [0, 1], [1, 0], [1, 1]], dtype=np.float32))
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y_target = np.array([[0], [1], [1], [0]], dtype=np.float32)
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# Network: 2 -> 4 -> 1 (sufficient for XOR)
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hidden = Dense(2, 4, use_bias=True)
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output = Dense(4, 1, use_bias=True)
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relu = ReLU()
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sigmoid = Sigmoid()
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# Forward pass
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h = hidden(X)
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h_relu = relu(h)
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out = output(h_relu)
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predictions = sigmoid(out)
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# Network should produce valid outputs
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assert predictions.shape == (4, 1), "XOR network architecture broken"
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# Test network capacity (parameter count)
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hidden_params = 2 * 4 + 4 # weights + bias
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output_params = 4 * 1 + 1 # weights + bias
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total_params = hidden_params + output_params
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# XOR requires at least 9 parameters theoretically
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assert total_params >= 9, "XOR network has insufficient capacity"
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except ImportError:
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assert True, "XOR network not ready yet"
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def test_nonlinear_problem_solvability(self):
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"""Test that non-linear problems are now solvable."""
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try:
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from tinytorch.core.layers import Dense
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from tinytorch.core.activations import ReLU
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from tinytorch.core.tensor import Tensor
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# Create network that can solve non-linear problems
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layer1 = Dense(2, 10)
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relu = ReLU()
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layer2 = Dense(10, 1)
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# Test various non-linear patterns
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patterns = [
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np.array([[0, 0], [0, 1], [1, 0], [1, 1]]), # XOR pattern
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np.array([[1, 1], [1, 0], [0, 1], [0, 0]]), # Inverse XOR
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]
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for pattern in patterns:
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X = Tensor(pattern.astype(np.float32))
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# Network should handle any pattern
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h = layer1(X)
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h_nonlinear = relu(h)
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output = layer2(h_nonlinear)
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assert output.shape[0] == 4, "Pattern processing broken"
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except ImportError:
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assert True, "Non-linear problem solving not ready yet"
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class TestFoundationMilestoneReadiness:
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"""Test that we're ready for Foundation Milestone achievements."""
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def test_mnist_mlp_architecture_possible(self):
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"""Test we can build MNIST MLP architecture."""
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try:
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from tinytorch.core.layers import Dense
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from tinytorch.core.activations import ReLU, Softmax
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from tinytorch.core.tensor import Tensor
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# MNIST MLP: 784 -> 128 -> 64 -> 10
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layer1 = Dense(784, 128)
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layer2 = Dense(128, 64)
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layer3 = Dense(64, 10)
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relu = ReLU()
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softmax = Softmax()
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# Simulated MNIST batch
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x = Tensor(np.random.randn(32, 784)) # 32 images, flattened
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# Forward pass through MLP
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h1 = relu(layer1(x)) # 32 x 128
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h2 = relu(layer2(h1)) # 32 x 64
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logits = layer3(h2) # 32 x 10
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probs = softmax(logits) # 32 x 10
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assert probs.shape == (32, 10), "MNIST MLP architecture broken"
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# Softmax should sum to 1 across classes
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prob_sums = np.sum(probs.data, axis=1)
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assert np.allclose(prob_sums, 1.0), "Softmax probabilities broken"
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except ImportError:
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assert True, "MNIST MLP not ready yet"
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def test_classification_capability(self):
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"""Test basic classification capability."""
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try:
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from tinytorch.core.layers import Dense
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from tinytorch.core.activations import ReLU, Softmax
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from tinytorch.core.tensor import Tensor
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# Simple classifier: features -> hidden -> classes
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feature_layer = Dense(20, 10)
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classifier = Dense(10, 3) # 3 classes
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relu = ReLU()
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softmax = Softmax()
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# Batch of features
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features = Tensor(np.random.randn(16, 20))
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# Classification pipeline
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h = relu(feature_layer(features))
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logits = classifier(h)
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class_probs = softmax(logits)
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# Should produce valid class probabilities
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assert class_probs.shape == (16, 3), "Classification shape broken"
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assert np.all(class_probs.data >= 0), "Negative probabilities"
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assert np.allclose(np.sum(class_probs.data, axis=1), 1.0), "Probabilities don't sum to 1"
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except ImportError:
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assert True, "Classification capability not ready yet"
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class TestCompleteStackValidation:
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"""Validate the complete foundation stack works end-to-end."""
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def test_end_to_end_neural_network(self):
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"""Test complete neural network from scratch."""
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try:
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from tinytorch.core.tensor import Tensor
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from tinytorch.core.layers import Dense
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from tinytorch.core.activations import ReLU, Sigmoid
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# End-to-end test: Build and run a complete neural network
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# 1. Data (from setup/tensor foundation)
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np.random.seed(42) # Reproducible
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X = Tensor(np.random.randn(10, 5))
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# 2. Network architecture (from layers foundation)
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layer1 = Dense(5, 8)
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layer2 = Dense(8, 3)
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layer3 = Dense(3, 1)
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# 3. Activations (from activation foundation)
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relu = ReLU()
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sigmoid = Sigmoid()
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# 4. Forward pass (everything working together)
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h1 = relu(layer1(X)) # 10 x 8
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h2 = relu(layer2(h1)) # 10 x 3
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output = sigmoid(layer3(h2)) # 10 x 1
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# 5. Validation
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assert output.shape == (10, 1), "End-to-end network broken"
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assert np.all(output.data >= 0), "Network output invalid"
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assert np.all(output.data <= 1), "Network output invalid"
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# 6. Network should be trainable (parameters exist)
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assert hasattr(layer1, 'weights'), "Layer 1 not trainable"
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assert hasattr(layer2, 'weights'), "Layer 2 not trainable"
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assert hasattr(layer3, 'weights'), "Layer 3 not trainable"
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except ImportError:
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assert True, "End-to-end neural network not ready yet"
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def test_foundation_stability_under_load(self):
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"""Test foundation remains stable under computational load."""
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try:
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from tinytorch.core.tensor import Tensor
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from tinytorch.core.layers import Dense
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from tinytorch.core.activations import ReLU
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# Stress test: Large network
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layer1 = Dense(100, 200)
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layer2 = Dense(200, 100)
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layer3 = Dense(100, 10)
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relu = ReLU()
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# Large batch
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X = Tensor(np.random.randn(256, 100))
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# Multiple forward passes
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for i in range(5):
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h1 = relu(layer1(X))
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h2 = relu(layer2(h1))
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output = layer3(h2)
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assert output.shape == (256, 10), f"Foundation unstable at iteration {i}"
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except ImportError:
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assert True, "Foundation stress testing not ready yet" |