def test_is_empty_zero_size(self) -> None:
"""
Test that is_empty is True when there is a matrix set but its size is 0.
"""
e = MatrixDataElement(())
assert isinstance(e._matrix, np.ndarray)
assert e.is_empty() is True
def test_matrix_property_set_not_RO(self) -> None:
"""
Test that we can set the numpy matrix via property.
"""
e = MatrixDataElement((1, 2, 3, 4), readonly=False)
e.matrix = (5, 6, 7, 8)
assert isinstance(e._matrix, np.ndarray)
np.testing.assert_allclose(e._matrix, (5, 6, 7, 8))
def test_set_bytes_None(self) -> None:
"""
Test that setting blank bytes sets the matrix data to None.
"""
e = MatrixDataElement((1,))
assert e._matrix is not None
e.set_bytes(b'')
assert e._matrix is None
def test_matrix_property_set_RO_exception(self) -> None:
"""
Test that setting to the matrix property results in a ReadOnlyError when
the `readonly` attribute is set.
"""
e = MatrixDataElement((1, 2, 3, 4), readonly=True)
with pytest.raises(ReadOnlyError):
e.matrix = (5, 6, 7, 8)
np.testing.assert_allclose(e._matrix, (1, 2, 3, 4))
def test_configuration_no_data(self) -> None:
"""
Testing getting the configuration from an instance with no matrix data
and creating a new instance from that configuration.
"""
inst = MatrixDataElement(readonly=False)
for i in configuration_test_helper(inst):
assert i.matrix is None
assert i.is_read_only() is False
inst = MatrixDataElement(readonly=True)
for i in configuration_test_helper(inst):
assert i.matrix is None
assert i.is_read_only() is True
def test_matrix_property_no_data(self) -> None:
"""
Test that matrix property returns None when internal attribute set to
None
"""
e = MatrixDataElement(None)
assert e.matrix is None
def test_configuration_with_data(self) -> None:
"""
Testing getting the configuration from an instance with no matrix data
and creating a new instance from that configuration.
"""
inst = MatrixDataElement((1, 2, 3, 4), readonly=False)
for i in configuration_test_helper(inst):
assert i.matrix is not None
np.testing.assert_allclose(i.matrix, (1, 2, 3, 4))
assert i.is_read_only() is False
inst = MatrixDataElement((1, 2, 3, 4), readonly=True)
for i in configuration_test_helper(inst):
assert i.matrix is not None
np.testing.assert_allclose(i.matrix, (1, 2, 3, 4))
assert i.is_read_only() is True
def test_init_with_sequence(self) -> None:
"""
Test that constructor converts given sequence into numpy array.
"""
s = (1, 2, 3, 4)
e = MatrixDataElement(s)
assert isinstance(e._matrix, np.ndarray)
np.testing.assert_allclose(e._matrix, s)
def test_set_bytes_valid_bytes(self) -> None:
"""
Test that setting valid numpy saved bytes results in expected matrix.
"""
expected_mat = np.array([[[1, 2, 3],
[4, 5, 6]],
[[7, 8, 9],
[0, 1, 2]],
[[3, 4, 5],
[6, 7, 8]]], dtype=np.float16)
expected_bytes_buf = BytesIO()
# noinspection PyTypeChecker
np.save(expected_bytes_buf, expected_mat)
expected_bytes = expected_bytes_buf.getvalue()
e = MatrixDataElement()
assert e._matrix is None
e.set_bytes(expected_bytes)
assert e._matrix is not None
np.testing.assert_allclose(e._matrix, expected_mat)
def test_init_with_ndarray(self) -> None:
"""
Test that constructor takes ndarray as is without copying.
"""
a = np.array([1, 2, 3, 4])
e = MatrixDataElement(a)
assert isinstance(e._matrix, np.ndarray)
np.testing.assert_allclose(e._matrix, (1, 2, 3, 4))
# Testing reference storing by modifying input array and observing
# effect in stored array.
a[:] = (5, 6, 7, 8)
np.testing.assert_allclose(e._matrix, (5, 6, 7, 8))
def test_matrix_property_with_data(self) -> None:
e = MatrixDataElement((1, 2, 3, 4))
assert isinstance(e.matrix, np.ndarray)
np.testing.assert_allclose(e.matrix, (1, 2, 3, 4))
def test_writable_false(self) -> None:
"""
Test that ``writable`` is False when readonly is True.
"""
assert MatrixDataElement(readonly=True).writable() is False
def test_is_usable(self) -> None:
"""
Test that implementation is always usable.
"""
assert MatrixDataElement.is_usable()
def test_get_bytes_with_data(self) -> None:
"""
Test that valid bytes are returned when a matrix is set.
"""
assert MatrixDataElement((1, 2, 3, 4)).get_bytes() != b''
def test_get_bytes_None(self) -> None:
"""
Test that empty bytes are returned when no matrix is set
"""
e = MatrixDataElement(None)
assert e.get_bytes() == b''
def test_is_empty_false(self) -> None:
"""
Test that is_empty is False when there is valid matrix data set.
"""
e = MatrixDataElement((1,))
assert e.is_empty() is False
def test_init_no_args(self) -> None:
"""
Test default constructor results in no internal data.
"""
e = MatrixDataElement()
assert e._matrix is None
def test_is_empty_None(self) -> None:
"""
Test that is_empty is True when there is no matrix set.
"""
e = MatrixDataElement(None)
assert e.is_empty() is True