def test_err(self):
"""Incorrect input."""
with self.assertRaises(TypeError):
self.f = MagicMock(return_value=sgn("qwerty"))
def test4(self):
"""Testing float 0."""
self.f = MagicMock(return_value=sgn(0.0))
self.assertEqual(self.f(), 0)
def test2(self):
"""Testing positive number."""
self.f = MagicMock(return_value=sgn(2.3))
self.assertEqual(self.f(), 1)
def test3(self):
"""Testing negative number."""
self.f = MagicMock(return_value=sgn(-3.7))
self.assertEqual(self.f(), -1)
def test1(self):
"""Testing int 0."""
self.f = MagicMock(return_value=sgn(0))
self.assertEqual(self.f(), 0)