def test_clear(self):
d = ComponentStore(self.one_dict, self.observer)
self.out.truncate(0)
d.clear()
output = self.out.getvalue().strip()
expected_reaction = self.obs_dict_clear + \
" ({}, " + str(self.one_dict) + ")"
# Check that the correct method is issued to the observer
self.assertEqual(output, expected_reaction)
def test_pop(self):
d = ComponentStore(self.one_dict, self.observer)
# Pop an existing value
self.out.truncate(0)
value = d.pop(2)
output = self.out.getvalue().strip()
expected_reaction = (self.obs_dict_pop + " (2, 'two')")
self.assertEqual(output, expected_reaction)
self.assertEqual('two', value)
# pop a missing value
value = d.pop(2)
self.assertEqual(None, value)
def test_setdefault(self):
d = ComponentStore(self.one_dict, self.observer)
# Set a default that does not exist
self.out.truncate(0)
value = d.setdefault(5, "five")
output = self.out.getvalue().strip()
expected_reaction = (self.obs_dict_setdefault +
" ({1: 'one', 2: 'two', 5: 'five'}, 5, 'five')")
self.assertEqual(output, expected_reaction)
self.assertEqual("five", value)
# now set one that exists
value = d.setdefault(5, "cinco")
self.assertEqual("five", value)
def test_setitem(self):
d = ComponentStore(observer=self.observer)
# Set a new item. We need to clear the buffer if the StringIO as well
self.out.truncate(0)
d[1] = "one"
output = self.out.getvalue().strip()
expected_reaction = self.obs_dict_create + " (1, 'one')"
# Check that the correct method is issued to the observer
self.assertEqual(output, expected_reaction)
# Set a second item
self.out.truncate(0)
d[2] = "two"
output = self.out.getvalue().strip()
expected_reaction = self.obs_dict_create + " (2, 'two')"
# Check that the correct method is issued to the observer
self.assertEqual(output, expected_reaction)
# Now replace a value
self.out.truncate(0)
d[2] = "dos"
output = self.out.getvalue().strip()
expected_reaction = self.obs_dict_set + " (2, 'dos', 'two')"
# Check that the correct method is issued to the observer
self.assertEqual(output, expected_reaction)
def test_delitem(self):
d = ComponentStore(self.one_dict, self.observer)
self.out.truncate(0)
del d[2]
output = self.out.getvalue().strip()
expected_reaction = self.obs_dict_del + " (2, 'two')"
# Check that the correct method is issued to the observer
self.assertEqual(output, expected_reaction)
def test_constructor_with_arguments(self):
self.out.truncate(0)
d = ComponentStore(self.one_dict, self.observer)
# When using arguments, the constructor needs to inform the observer
# that the dict was initialized
output = self.out.getvalue().strip()
expected_reaction = self.obs_dict_init + \
' (' + str(self.one_dict) + (',)')
self.assertEqual(output, expected_reaction)
self.assertIsNotNone(d)
def test_popitem(self):
d = ComponentStore(self.one_dict, self.observer)
test_dict = self.one_dict.copy()
# Pop a value, Python decides
self.out.truncate(0)
key, value = d.popitem()
test_dict.pop(key)
output = self.out.getvalue().strip()
expected_reaction = (self.obs_dict_popitem + " (" + str(key) + ", '" +
str(value) + "')")
self.assertEqual(output, expected_reaction)
# pop another item
self.out.truncate(0)
key, value = d.popitem()
test_dict.pop(key)
output = self.out.getvalue().strip()
expected_reaction = (self.obs_dict_popitem + " (" + ", " + str(key) +
", " + str(value) + ")")
def test_update(self):
d = ComponentStore(self.one_dict, self.observer)
# Update without replacement
self.out.truncate(0)
d.update(self.other_dict)
output = self.out.getvalue().strip()
expected_reaction = (self.obs_dict_update +
" ([(3, 'three'), (4, 'four')], [])")
self.assertEqual(output, expected_reaction)
# Now with a replacement
self.out.truncate(0)
d.update({1: "one", 2: "dos"})
output = self.out.getvalue().strip()
expected_reaction = (self.obs_dict_update +
" ([], [(1, 'one', 'one'), (2, 'dos', 'two')])")
self.assertEqual(output, expected_reaction)