/usr/lib/python2.7/dist-packages/traits/tests/test_extended_notifiers.py is in python-traits 4.5.0-1ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 | """ Tests for the extended notifiers.
The "extended notifiers" are set up internally when using extended traits, to
add/remove traits listeners when one of the intermediate traits changes.
For example, in a listener for the extended trait `a.b`, we need to add/remove
listeners to `a:b` when `a` changes.
"""
from traits import _py2to3
from traits.api import Float, HasTraits, List
from traits.testing.unittest_tools import unittest
from traits import trait_notifiers
class ExtendedNotifiers(HasTraits):
def __init__(self, **traits):
# Set up the 'extended' internal notifiers (see module docstring)
ok_listeners = [self.method_listener_0,
self.method_listener_1,
self.method_listener_2,
self.method_listener_3,
self.method_listener_4]
for listener in ok_listeners:
self._on_trait_change(listener, 'ok', dispatch='extended')
fail_listeners = [self.failing_method_listener_0,
self.failing_method_listener_1,
self.failing_method_listener_2,
self.failing_method_listener_3,
self.failing_method_listener_4]
for listener in fail_listeners:
self._on_trait_change(listener, 'fail', dispatch='extended')
super(ExtendedNotifiers, self).__init__(**traits)
ok = Float
fail = Float
# Lists where we accumulate the arguments of calls to the traits notifiers.
rebind_calls_0 = List
rebind_calls_1 = List
rebind_calls_2 = List
rebind_calls_3 = List
rebind_calls_4 = List
exceptions_from = List
#### 'ok' trait listeners
def method_listener_0(self):
self.rebind_calls_0.append(True)
def method_listener_1(self, new):
self.rebind_calls_1.append(new)
def method_listener_2(self, name, new):
self.rebind_calls_2.append((name, new))
def method_listener_3(self, obj, name, new):
self.rebind_calls_3.append((obj, name, new))
def method_listener_4(self, obj, name, old, new):
self.rebind_calls_4.append((obj, name, old, new))
#### 'fail' trait listeners
def failing_method_listener_0(self):
self.exceptions_from.append(0)
raise Exception('error')
def failing_method_listener_1(self, new):
self.exceptions_from.append(1)
raise Exception('error')
def failing_method_listener_2(self, name, new):
self.exceptions_from.append(2)
raise Exception('error')
def failing_method_listener_3(self, obj, name, new):
self.exceptions_from.append(3)
raise Exception('error')
def failing_method_listener_4(self, obj, name, old, new):
self.exceptions_from.append(4)
raise Exception('error')
# 'ok' function listeners
calls_0 = []
def function_listener_0():
calls_0.append(True)
calls_1 = []
def function_listener_1(new):
calls_1.append(new)
calls_2 = []
def function_listener_2(name, new):
calls_2.append((name, new))
calls_3 = []
def function_listener_3(obj, name, new):
calls_3.append((obj, name, new))
calls_4 = []
def function_listener_4(obj, name, old, new):
calls_4.append((obj, name, old, new))
# 'fail' function listeners
exceptions_from = []
def failing_function_listener_0():
exceptions_from.append(0)
raise Exception('error')
def failing_function_listener_1(new):
exceptions_from.append(1)
raise Exception('error')
def failing_function_listener_2(name, new):
exceptions_from.append(2)
raise Exception('error')
def failing_function_listener_3(obj, name, new):
exceptions_from.append(3)
raise Exception('error')
def failing_function_listener_4(obj, name, old, new):
exceptions_from.append(4)
raise Exception('error')
class TestExtendedNotifiers(unittest.TestCase):
#### 'TestCase' protocol ##################################################
def setUp(self):
self.exceptions = []
trait_notifiers.push_exception_handler(self._handle_exception)
def tearDown(self):
trait_notifiers.pop_exception_handler()
#### Private protocol #####################################################
def _handle_exception(self, obj, name, old, new):
self.exceptions.append((obj, name, old, new))
#### Tests ################################################################
def test_extended_notifiers_methods(self):
obj = ExtendedNotifiers(ok=2)
obj.ok = 3
self.assertEqual(len(obj.rebind_calls_0), 2)
expected_1 = [2, 3]
self.assertEqual(expected_1, obj.rebind_calls_1)
expected_2 = [('ok', 2), ('ok', 3)]
self.assertEqual(expected_2, obj.rebind_calls_2)
expected_3 = [(obj, 'ok', 2), (obj, 'ok', 3)]
self.assertEqual(expected_3, obj.rebind_calls_3)
expected_4 = [(obj, 'ok', 0, 2), (obj, 'ok', 2, 3)]
self.assertEqual(expected_4, obj.rebind_calls_4)
def test_extended_notifiers_methods_failing(self):
obj = ExtendedNotifiers()
obj.fail = 1
_py2to3.assertCountEqual(self, [0, 1, 2, 3, 4], obj.exceptions_from)
self.assertEqual([(obj, 'fail', 0, 1)]*5, self.exceptions)
def test_extended_notifiers_functions(self):
obj = ExtendedNotifiers()
obj._on_trait_change(function_listener_0, 'ok', dispatch='extended')
obj._on_trait_change(function_listener_1, 'ok', dispatch='extended')
obj._on_trait_change(function_listener_2, 'ok', dispatch='extended')
obj._on_trait_change(function_listener_3, 'ok', dispatch='extended')
obj._on_trait_change(function_listener_4, 'ok', dispatch='extended')
obj.ok = 2
obj.ok = 3
expected_1 = [2, 3]
self.assertEqual(expected_1, calls_1)
expected_2 = [('ok', 2), ('ok', 3)]
self.assertEqual(expected_2, calls_2)
expected_3 = [(obj, 'ok', 2), (obj, 'ok', 3)]
self.assertEqual(expected_3, calls_3)
expected_4 = [(obj, 'ok', 0, 2), (obj, 'ok', 2, 3)]
self.assertEqual(expected_4, calls_4)
def test_extended_notifiers_functions_failing(self):
obj = ExtendedNotifiers()
obj._on_trait_change(failing_function_listener_0, 'fail',
dispatch='extended')
obj._on_trait_change(failing_function_listener_1, 'fail',
dispatch='extended')
obj._on_trait_change(failing_function_listener_2, 'fail',
dispatch='extended')
obj._on_trait_change(failing_function_listener_3, 'fail',
dispatch='extended')
obj._on_trait_change(failing_function_listener_4, 'fail',
dispatch='extended')
obj.fail = 1
_py2to3.assertCountEqual(self, [0, 1, 2, 3, 4], obj.exceptions_from)
# 10 failures: 5 are from the internal extended listeners, see
# test_extended_notifiers_methods_failing
self.assertEqual([(obj, 'fail', 0, 1)] * 10, self.exceptions)
if __name__ == '__main__':
unittest.main()
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