Add test_signalutils

qutebrowser/test/test_signalutils.py

@@ -0,0 +1,99 @@
+# Copyright 2014 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
+#
+# This file is part of qutebrowser.
+#
+# qutebrowser is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# qutebrowser is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with qutebrowser.  If not, see <http://www.gnu.org/licenses/>.
+
+# pylint: disable=missing-docstring
+
+"""Tests for signal utils."""
+
+import unittest
+from unittest import TestCase
+from unittest.mock import Mock
+
+import qutebrowser.utils.signals as sigutils
+
+
+class FakeSignal:
+
+    """Fake pyqtSignal stub which uses a mock to see if it was called."""
+
+    def __init__(self, name='fake'):
+        self.signal = '2{}(int, int)'.format(name)
+        self.emit = Mock()
+
+
+class TestDebug(TestCase):
+
+    """Test signal debug output functions."""
+
+    def setUp(self):
+        self.signal = FakeSignal()
+
+    def test_signal_name(self):
+        self.assertEqual(sigutils.signal_name(self.signal), 'fake')
+
+    def test_dbg_signal(self):
+        self.assertEqual(sigutils.dbg_signal(self.signal, [23, 42]),
+                         'fake(23, 42)')
+
+
+class TestSignalCache(TestCase):
+
+    """SignalCache tests."""
+
+    def setUp(self):
+        self.signal1 = FakeSignal('fake1')
+        self.signal2 = FakeSignal('fake2')
+        self.cache = sigutils.SignalCache()
+
+    def test_replay(self):
+        """Test simple replaying."""
+        self.cache.add(self.signal1, [1, 2])
+        self.cache.add(self.signal2, [3, 4])
+        self.cache.replay()
+        self.signal1.emit.assert_called_once_with(1, 2)
+        self.signal2.emit.assert_called_once_with(3, 4)
+
+    def test_update(self):
+        """Test replaying when a signal was updated."""
+        self.cache.add(self.signal1, [1, 2])
+        self.cache.add(self.signal2, [3, 4])
+        self.cache.add(self.signal1, [5, 6])
+        self.cache.replay()
+        self.signal1.emit.assert_called_once_with(5, 6)
+        self.signal2.emit.assert_called_once_with(3, 4)
+
+    def test_clear(self):
+        """Test clearing the signal cache."""
+        self.cache.add(self.signal1, [1, 2])
+        self.cache.add(self.signal2, [3, 4])
+        self.cache.clear()
+        self.cache.add(self.signal1, [5, 6])
+        self.cache.replay()
+        self.signal1.emit.assert_called_once_with(5, 6)
+
+    def test_uncached(self):
+        """Test that uncached signals actually are uncached."""
+        cache = sigutils.SignalCache(uncached=['fake2'])
+        cache.add(self.signal1, [1, 2])
+        cache.add(self.signal2, [3, 4])
+        cache.replay()
+        self.signal1.emit.assert_called_once_with(1, 2)
+        self.assertFalse(self.signal2.emit.called)
+
+
+if __name__ == '__main__':
+    unittest.main()