125 lines
4.2 KiB
Python
125 lines
4.2 KiB
Python
import torch
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import pytest
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from pina import LabelTensor
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from pina.operators import grad, div, laplacian
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def func_vector(x):
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return x**2
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def func_scalar(x):
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x_ = x.extract(['x'])
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y_ = x.extract(['y'])
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z_ = x.extract(['z'])
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return x_**2 + y_**2 + z_**2
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inp = LabelTensor(torch.rand((20, 3), requires_grad=True), ['x', 'y', 'z'])
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tensor_v = LabelTensor(func_vector(inp), ['a', 'b', 'c'])
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tensor_s = LabelTensor(func_scalar(inp).reshape(-1, 1), ['a'])
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def test_grad_scalar_output():
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grad_tensor_s = grad(tensor_s, inp)
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true_val = 2*inp
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assert grad_tensor_s.shape == inp.shape
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assert grad_tensor_s.labels == [
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f'd{tensor_s.labels[0]}d{i}' for i in inp.labels
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]
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assert torch.allclose(grad_tensor_s, true_val)
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grad_tensor_s = grad(tensor_s, inp, d=['x', 'y'])
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true_val = 2*inp.extract(['x', 'y'])
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assert grad_tensor_s.shape == (inp.shape[0], 2)
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assert grad_tensor_s.labels == [
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f'd{tensor_s.labels[0]}d{i}' for i in ['x', 'y']
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]
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assert torch.allclose(grad_tensor_s, true_val)
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def test_grad_vector_output():
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grad_tensor_v = grad(tensor_v, inp)
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true_val = torch.cat(
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(2*inp.extract(['x']),
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torch.zeros_like(inp.extract(['y'])),
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torch.zeros_like(inp.extract(['z'])),
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torch.zeros_like(inp.extract(['x'])),
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2*inp.extract(['y']),
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torch.zeros_like(inp.extract(['z'])),
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torch.zeros_like(inp.extract(['x'])),
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torch.zeros_like(inp.extract(['y'])),
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2*inp.extract(['z'])
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), dim=1
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)
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assert grad_tensor_v.shape == (20, 9)
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assert grad_tensor_v.labels == [
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f'd{j}d{i}' for j in tensor_v.labels for i in inp.labels
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]
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assert torch.allclose(grad_tensor_v, true_val)
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grad_tensor_v = grad(tensor_v, inp, d=['x', 'y'])
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true_val = torch.cat(
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(2*inp.extract(['x']),
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torch.zeros_like(inp.extract(['y'])),
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torch.zeros_like(inp.extract(['x'])),
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2*inp.extract(['y']),
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torch.zeros_like(inp.extract(['x'])),
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torch.zeros_like(inp.extract(['y']))
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), dim=1
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)
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assert grad_tensor_v.shape == (inp.shape[0], 6)
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assert grad_tensor_v.labels == [
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f'd{j}d{i}' for j in tensor_v.labels for i in ['x', 'y']
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]
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assert torch.allclose(grad_tensor_v, true_val)
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def test_div_vector_output():
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div_tensor_v = div(tensor_v, inp)
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true_val = 2*torch.sum(inp, dim=1).reshape(-1,1)
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assert div_tensor_v.shape == (20, 1)
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assert div_tensor_v.labels == [f'dadx+dbdy+dcdz']
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assert torch.allclose(div_tensor_v, true_val)
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div_tensor_v = div(tensor_v, inp, components=['a', 'b'], d=['x', 'y'])
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true_val = 2*torch.sum(inp.extract(['x', 'y']), dim=1).reshape(-1,1)
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assert div_tensor_v.shape == (inp.shape[0], 1)
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assert div_tensor_v.labels == [f'dadx+dbdy']
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assert torch.allclose(div_tensor_v, true_val)
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def test_laplacian_scalar_output():
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laplace_tensor_s = laplacian(tensor_s, inp)
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true_val = 6*torch.ones_like(laplace_tensor_s)
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assert laplace_tensor_s.shape == tensor_s.shape
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assert laplace_tensor_s.labels == [f"dd{tensor_s.labels[0]}"]
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assert torch.allclose(laplace_tensor_s, true_val)
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laplace_tensor_s = laplacian(tensor_s, inp, components=['a'], d=['x', 'y'])
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true_val = 4*torch.ones_like(laplace_tensor_s)
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assert laplace_tensor_s.shape == tensor_s.shape
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assert laplace_tensor_s.labels == [f"dd{tensor_s.labels[0]}"]
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assert torch.allclose(laplace_tensor_s, true_val)
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def test_laplacian_vector_output():
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laplace_tensor_v = laplacian(tensor_v, inp)
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true_val = 2*torch.ones_like(tensor_v)
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assert laplace_tensor_v.shape == tensor_v.shape
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assert laplace_tensor_v.labels == [
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f'dd{i}' for i in tensor_v.labels
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]
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assert torch.allclose(laplace_tensor_v, true_val)
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laplace_tensor_v = laplacian(tensor_v,
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inp,
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components=['a', 'b'],
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d=['x', 'y'])
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true_val = 2*torch.ones_like(tensor_v.extract(['a', 'b']))
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assert laplace_tensor_v.shape == tensor_v.extract(['a', 'b']).shape
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assert laplace_tensor_v.labels == [
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f'dd{i}' for i in ['a', 'b']
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]
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assert torch.allclose(laplace_tensor_v, true_val)
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