def testLowerDecomposition(self):
columns = 3
rows = 3
matrix = Matrix(rows, columns)
matrix.setRow(1, [1, 2, 3])
matrix.setRow(2, [4, 5, 6])
matrix.setRow(3, [7, 8, 9])
lu_matrix_list = matrix.get_lu_decomposition()
new_matrix = lu_matrix_list[0] * lu_matrix_list[1]
self.assertEqual(matrix.matrix, new_matrix.matrix)
