def test_Tensor_simplify():
x, y, z = symbols("x y z")
test_list = [[[x, y], [y, sin(2 * z) - 2 * sin(z) * cos(z)]], [[z ** 2, x], [y, z]]]
obj = Tensor(test_list)
# with set_self = False
assert obj.simplify(set_self=False)[0, 1, 1] == 0
assert not obj.tensor()[0, 1, 1] == 0
# with set_self = True
obj.simplify(set_self=True)
assert obj.tensor()[0, 1, 1] == 0
def test_Tensor():
x, y, z = symbols("x y z")
test_list = [[[x, y], [y, sin(2 * z) - 2 * sin(z) * cos(z)]], [[z ** 2, x], [y, z]]]
test_arr = Array(test_list)
obj1 = Tensor(test_arr)
obj2 = Tensor(test_list)
assert obj1.tensor() == obj2.tensor()
assert isinstance(obj1.tensor(), Array)
assert obj1.simplify()[0, 1, 1] == 0