def test_cube_root_negative(self):
"""test case for check cube root"""
test = ScientificCalc()
self.assertEqual(test.cube_root(-8), -2)
def test_cube_root1(self):
"""test case for exception"""
test = ScientificCalc()
self.assertEqual(test.cube_root("hai"), "ValueError")
def test_cube_root(self):
"""test case for check cube root"""
test = ScientificCalc()
self.assertEqual(test.cube_root(8), 2)