def setUp(self):
self.positivity_rules = rules(
(gt(0), 'positive'),
(lt(0), 'negative'),
)
self.type_rules = rules(
(is_number, rules(
(gt(0), 'positive number'),
(eq(0), 'zero'),
(lt(0), 'negative number'),
)),
(is_string, 'string'),
(otherwise, 'unhandled type'),
)
def test_addition(self):
rules1 = rules(
(gt(0), 'positive'),
(lt(0), 'negative'),
)
rules2 = rules((eq(0), 'zero'), )
these_rules = rules1 + rules2
self.assertEqual(len(these_rules), 3)
self.assertEqual(decide(these_rules, 0), 'zero')
def test_addition(self):
rules1 = rules(
(gt(0), 'positive'),
(lt(0), 'negative'),
)
rules2 = rules(
(eq(0), 'zero'),
)
these_rules = rules1 + rules2
self.assertEqual(len(these_rules), 3)
self.assertEqual(decide(these_rules, 0), 'zero')
def test_len(self):
these_rules = rules(
(gt(0), 'positive'),
(lt(0), 'negative'),
)
self.assertEqual(len(these_rules), 2)
def test_lt(self):
less_than_ten = lt(10)
self.assertTrue(less_than_ten(8))
self.assertFalse(less_than_ten(10))
self.assertFalse(less_than_ten(20))
def test_len(self):
these_rules = rules(
(gt(0), 'positive'),
(lt(0), 'negative'),
)
self.assertEqual(len(these_rules), 2)