def test_matrix_is_transposed(self):
""" Test checks whether transpose was successful"""
m3m = MimicMatrix([[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11,
12]]).transpose()
self.assertEqual(m3m, [[1, 5, 9], [2, 6, 10], [3, 7, 11], [4, 8, 12]])
m4m = MimicMatrix([[1, 2], [3, 4], [5, 6], [7, 8]]).transpose()
self.assertEqual(m4m, [[1, 3, 5, 7], [2, 4, 6, 8]])
def test_negate_matrix(self):
""" Test checks whether it is possible to negate """
m3m = MimicMatrix([[2, 3], [3, 5]])
self.assertEqual(-m3m, [[-2, -3], [-3, -5]])
m2m = MimicMatrix([[1], [4]])
nm2m = -m2m
self.assertEqual(nm2m, [[-1], [-4]])
def test_matrix_right_operations_are_possible_and_correct(self):
""" Tests checks correctness of right operations """
m1m = MimicMatrix([[1, 2, 4], [5, 7, 9]])
m2m = MimicMatrix([[1, 2, 5], [10, 14, -5]])
obj = m2m + m1m
self.assertEqual([[2, 4, 9], [15, 21, 4]], obj)
obj = m2m - m1m
self.assertEqual([[0, 0, 1], [5, 7, -14]], obj)
def test_multiplication_of_matrix_with_either_matrix_and_number(self):
""" Test checks whether non-square matrix can be multiplied by number
or another matrix
"""
m3m = MimicMatrix([[1, 2, 3], [0, 1, 0]])
m4m = MimicMatrix([[1, 1], [0, 0], [2, 1]])
self.assertEqual(m3m * m4m, [[7, 4], [0, 0]])
self.assertEqual(m3m * 2, [[2, 4, 6], [0, 2, 0]])
def test_matrix_is_same_row_size_and_not_null(self):
""" Test that checks whether matrix object raises Error
if its rows are not the same size or null
"""
with self.assertRaises(ValueError) as cm:
MimicMatrix([[1, 2, 3], [5, 6]])
self.assertEqual(str(cm.exception), 'Rows are not the same size')
with self.assertRaises(ValueError) as cm:
MimicMatrix([])
self.assertEqual(str(cm.exception), 'Put dimensions to matrix')
def test_involute_matrix_with_bad_or_good_inputs(self):
""" Test checks whether it is possible to involute matrix"""
m3m = MimicMatrix([[2, 3], [3, 5]])
self.assertEqual(m3m**2, [[13, 21], [21, 34]])
wrong_mm = MimicMatrix([[1, 2, 8], [3, 4, 5]])
with self.assertRaises(TypeError) as cm:
wrong_mm**2
self.assertEqual(str(cm.exception),
'Unsupported matrix type (must be square)')
with self.assertRaises(TypeError) as cm:
wrong_mm**'12'
self.assertEqual(str(cm.exception),
"Cannot involute on - <class 'str'> type")
def test_attributes_can_be_fetched_from_instance(self):
m3m = MimicMatrix([[1, 2], [4, 6]])
self.assertEqual(m3m.m_size, (2, 2))
with self.assertRaises(AttributeError) as cm:
print(m3m.spoon)
self.assertEqual(str(cm.exception),
"'MimicMatrix' object has no attribute 'spoon'")
def test_matrix_are_sub_add_compatible(self):
""" Test that checks whether matrix object raises Error
if they are not the same size
"""
m1m = MimicMatrix([(1, 2, 4), (5, 7, 9)])
m2m = MimicMatrix([(1, 2, 5), (10, 14, -5)])
m3m = MimicMatrix([[1, 2], [4, 6]])
self.assertTrue(m1m._is_matrix_compatible(m2m))
with self.assertRaises(ValueError) as cm:
m1m._is_matrix_compatible(m3m)
self.assertEqual(str(cm.exception),
'Matrix instances are not the same size')
def test_square_matrix_multiplication(self):
""" Test checks whether square matrix multiple well"""
m1m = MimicMatrix([[1, 2], [2, 1]])
m2m = MimicMatrix([[1, 3], [4, 1]])
self.assertEqual(m1m * m2m, [[9, 5], [6, 7]])
def test_matrix_substruction_is_possible_and_correct(self):
""" Test checks whether it is possible to subtract from Matrix"""
m1m = MimicMatrix([[1, 2, 4], [5, 7, 9]])
m2m = MimicMatrix([[1, 2, 5], [10, 14, -5]])
obj = m1m - m2m
self.assertEqual([[0, 0, -1], [-5, -7, 14]], obj)
def test_matrix_addition_is_possible_and_correct(self):
""" Test checks whether it is possible to add to Matrix """
m1m = MimicMatrix([[1, 2, 4], [5, 7, 9]])
m2m = MimicMatrix([[1, 2, 5], [10, 14, -5]])
obj = m1m + m2m
self.assertEqual([[2, 4, 9], [15, 21, 4]], obj)