def test_lhs(self):
p = pred.P(4)
f = lambda x: x()
self.assertTrue(f(p > 2))
self.assertFalse(f(p < 2))
self.assertTrue(f(p >= 4))
self.assertTrue(f(p <= 4))
self.assertFalse(f(p != 4))
self.assertTrue(f(p != 3))
# verify for a string too
p = pred.P('hello')
self.assertTrue(f(p == 'hello'))
self.assertFalse(f(p == 'goodbye'))
self.assertTrue(f(p != 'goodbye'))
def test_rhs(self):
p = pred.P(4)
f = lambda x: x()
self.assertTrue(f(2 < p))
self.assertFalse(f(2 > p))
self.assertTrue(f(4 <= p))
self.assertTrue(f(4 >= p))
self.assertFalse(f(4 != p))
self.assertTrue(f(3 != p))
# verify for a string too
p = pred.P('hello')
self.assertTrue(f('hello' == p))
self.assertFalse(f('goodbye' == p))
self.assertTrue(f('goodbye' != p))
def test_repr(self):
self.assertEqual(repr(pred.P(4)), 'P(item=4)')
self.assertEqual(repr(pred.P('hello')), "P(item='hello')")
def test_str(self):
self.assertEqual(str(pred.P(4)), '4')
self.assertEqual(str(pred.P('hello')), 'hello')
def test_returns_callable(self):
x = pred.P(4) > 2
self.assertIsInstance(x, pred.Callable)