1 files changed, 79 insertions, 0 deletions
diff --git a/cliapp/hook_tests.py b/cliapp/hook_tests.py
new file mode 100644
index 00000000..a32f33af
--- /dev/null
+++ b/cliapp/hook_tests.py
@@ -0,0 +1,79 @@
+# Copyright (C) 2009-2012  Lars Wirzenius
+#
+# This program 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 2 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+import unittest
+
+from cliapp import Hook, FilterHook
+
+
+class HookTests(unittest.TestCase):
+
+    def setUp(self):
+        self.hook = Hook()
+
+    def callback(self, *args, **kwargs):
+        self.args = args
+        self.kwargs = kwargs
+
+    def test_has_no_callbacks_by_default(self):
+        self.assertEqual(self.hook.callbacks, [])
+
+    def test_adds_callback(self):
+        self.hook.add_callback(self.callback)
+        self.assertEqual(self.hook.callbacks, [self.callback])
+
+    def test_adds_callback_only_once(self):
+        self.hook.add_callback(self.callback)
+        self.hook.add_callback(self.callback)
+        self.assertEqual(self.hook.callbacks, [self.callback])
+
+    def test_calls_callback(self):
+        self.hook.add_callback(self.callback)
+        self.hook.call_callbacks('bar', kwarg='foobar')
+        self.assertEqual(self.args, ('bar',))
+        self.assertEqual(self.kwargs, { 'kwarg': 'foobar' })
+
+    def test_removes_callback(self):
+        cb_id = self.hook.add_callback(self.callback)
+        self.hook.remove_callback(cb_id)
+        self.assertEqual(self.hook.callbacks, [])
+
+
+class FilterHookTests(unittest.TestCase):
+
+    def setUp(self):
+        self.hook = FilterHook()
+
+    def callback(self, data, *args, **kwargs):
+        self.args = args
+        self.kwargs = kwargs
+        return data + ['callback']
+
+    def test_returns_argument_if_no_callbacks(self):
+        self.assertEqual(self.hook.call_callbacks(['foo']), ['foo'])
+
+    def test_calls_callback_and_returns_modified_data(self):
+        self.hook.add_callback(self.callback)
+        data = self.hook.call_callbacks([])
+        self.assertEqual(data, ['callback'])
+
+    def test_calls_callback_with_extra_args(self):
+        self.hook.add_callback(self.callback)
+        self.hook.call_callbacks(['data'], 'extra', kwextra='kwextra')
+        self.assertEqual(self.args, ('extra',))
+        self.assertEqual(self.kwargs, { 'kwextra': 'kwextra' })
+