def test_TensorProduct_construction():
assert TensorProduct(3, 4) == 12
assert isinstance(TensorProduct(A, A), TensorProduct)
expr = TensorProduct(TensorProduct(x, y), z)
assert expr == x * y * z
expr = TensorProduct(TensorProduct(A, B), C)
assert expr == TensorProduct(A, B, C)
expr = TensorProduct(Matrix.eye(2), [[0, -1], [1, 0]])
assert expr == Array([[[[0, -1], [1, 0]], [[0, 0], [0, 0]]],
[[[0, 0], [0, 0]], [[0, -1], [1, 0]]]])
def test_TensorProduct_shape():
expr = TensorProduct(3, 4, evaluate=False)
assert expr.shape == ()
assert expr.rank() == 0
expr = TensorProduct([1, 2], [x, y], evaluate=False)
assert expr.shape == (2, 2)
assert expr.rank() == 2
expr = TensorProduct(expr, expr, evaluate=False)
assert expr.shape == (2, 2, 2, 2)
assert expr.rank() == 4
expr = TensorProduct(Matrix.eye(2), [[0, -1], [1, 0]], evaluate=False)
assert expr.shape == (2, 2, 2, 2)
assert expr.rank() == 4
def test_TensorProduct_getitem():
expr = TensorProduct(A, B)
assert expr[i, j, k, l] == A[i, j] * B[k, l]
def test_TensorProduct_shape():
expr = TensorProduct(3, 4, evaluate=False)
assert expr.shape == ()
assert expr.rank() == 0
expr = TensorProduct([1, 2], [x, y], evaluate=False)
assert expr.shape == (2, 2)
assert expr.rank() == 2
expr = TensorProduct(expr, expr, evaluate=False)
assert expr.shape == (2, 2, 2, 2)
assert expr.rank() == 4
expr = TensorProduct(Matrix.eye(2), [[0, -1], [1, 0]], evaluate=False)
assert expr.shape == (2, 2, 2, 2)
assert expr.rank() == 4