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import random
from .ut_utils import ForgeTestCase
from forge.exceptions import UnexpectedCall
class Obj(object):
def f(self, a, b, c):
raise NotImplementedError() # pragma: no cover
def g(self, value):
raise NotImplementedError() # pragma: no cover
class WheneverTest(ForgeTestCase):
def setUp(self):
super(WheneverTest, self).setUp()
self.obj = self.forge.create_mock(Obj)
def test__whenever_verifies_arguments(self):
self.obj.f(1, 2, 3).whenever().and_return(2)
self.forge.replay()
self.assertEqual(self.obj.f(1, 2, 3), 2)
with self.assertRaises(UnexpectedCall):
self.obj.f(1, 2, 4)
self.assertEqual(self.obj.f(1, 2, 3), 2)
def test__whenever_accepts_zero_times(self):
self.obj.f(1, 2, 3).whenever().and_return(2)
self.forge.replay()
def test__whenever_and_raise(self):
e = Exception()
self.obj.f(1, 2, 3).whenever().and_raise(e)
self.forge.replay()
with self.assertRaises(Exception) as caught:
self.obj.f(1, 2, 3)
self.assertIs(caught.exception, e)
def test__whenever_with_multiple_groups(self):
call = self.obj.f(1, 2, 3)
self.obj.f(1, 1, 1).and_return(1)
with self.forge.any_order():
self.obj.f(2, 2, 2).and_return(2)
self.obj.f(3, 3, 3).and_return(3)
call.whenever().and_return("hey")
self.forge.replay()
for i in range(3):
self.assertEqual("hey", self.obj.f(1, 2, 3))
self.assertEqual(1, self.obj.f(1, 1, 1))
self.assertEqual("hey", self.obj.f(1, 2, 3))
self.assertEqual(2, self.obj.f(2, 2, 2))
self.assertEqual(3, self.obj.f(3, 3, 3))
self.assertEqual("hey", self.obj.f(1, 2, 3))
def test__whenever_patterns(self):
values = list(range(10))
for value in values:
self.obj.g(value).whenever().and_return(value*2)
self.forge.replay()
for i in range(3):
random.shuffle(values)
for value in values:
self.assertEqual(self.obj.g(value), value * 2)
with self.assertRaises(UnexpectedCall):
self.obj.g(max(values)+1)
def test__whenever_when_syntax(self):
self.obj.g.when(1).then_return(2)
self.forge.replay()
self.assertEqual(self.obj.g(1), 2)
self.assertEqual(self.obj.g(1), 2)
self.assertEqual(self.obj.g(1), 2)
with self.assertRaises(UnexpectedCall):
self.obj.g(2)
def test__whenever_when_syntax_disabled_in_replay(self):
self.forge.replay()
self.obj.g # make sure the stub exists
with self.assertRaises(AttributeError):
self.obj.g.when
def test__whenever_when_syntax_in_group(self):
with self.forge.ordered():
self.obj.f(1, 2, 3).and_return(42)
self.obj.g.when(1).then_return(2)
with self.forge.ordered():
self.obj.f(3, 2, 1).and_return(24)
self.obj.g.when(1).then_return(3)
self.forge.replay()
self.assertEqual(self.obj.g(1), 2)
self.assertEqual(self.obj.g(1), 2)
self.assertEqual(self.obj.f(1, 2, 3), 42)
self.assertEqual(self.obj.g(1), 3)
self.assertEqual(self.obj.g(1), 3)
self.assertEqual(self.obj.f(3, 2, 1), 24)
def test__whenever_applies_only_in_group(self):
result = object()
with self.forge.ordered():
self.obj.f(1, 1, 1)
with self.forge.any_order():
self.obj.g(1).whenever().and_return(result)
self.obj.f(2, 2, 2)
self.obj.f(3, 3, 3)
self.forge.replay()
with self.assertRaises(UnexpectedCall):
self.obj.g(1)
self.obj.f(1, 1, 1)
self.assertIs(result, self.obj.g(1))
self.obj.f(2, 2, 2)
with self.assertRaises(UnexpectedCall):
# once f(2, 2, 2) is called, the group is cleared and the whenever() no longer applies
self.obj.g(1)
self.obj.f(3, 3, 3)
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