Fix ALPM unittest to run when ALPM isn't present

This gets some proper unittest skip decorator action now in addition to
adding more testing around everything.

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 21 insertions, 2 deletions

diff --git a/packages/tests.py b/packages/tests.py
index 3a46086..bbe9f00 100644
--- a/packages/tests.py
+++ b/packages/tests.py
@@ -2,17 +2,27 @@ import unittest
 
 from .alpm import AlpmAPI
 
+
+alpm = AlpmAPI()
+
+
 class AlpmTestCase(unittest.TestCase):
+
+    @unittest.skipUnless(alpm.available, "ALPM is unavailable")
     def test_version(self):
-        alpm = AlpmAPI()
         version = alpm.version()
         self.assertIsNotNone(version)
         version = version.split('.')
         # version is a 3-tuple, e.g., '7.0.2'
         self.assertEqual(3, len(version))
 
+    @unittest.skipUnless(alpm.available, "ALPM is unavailable")
+    def test_vercmp(self):
+        self.assertEqual(0, alpm.vercmp("1.0", "1.0"))
+        self.assertEqual(1, alpm.vercmp("1.1", "1.0"))
+
+    @unittest.skipUnless(alpm.available, "ALPM is unavailable")
     def test_compare_versions(self):
-        alpm = AlpmAPI()
         self.assertTrue(alpm.compare_versions("1.0", "<=", "2.0"))
         self.assertTrue(alpm.compare_versions("1.0", "<", "2.0"))
         self.assertFalse(alpm.compare_versions("1.0", ">=", "2.0"))
@@ -24,4 +34,13 @@ class AlpmTestCase(unittest.TestCase):
         self.assertTrue(alpm.compare_versions("1.0", "=", "1.0-1"))
         self.assertFalse(alpm.compare_versions("1.0", "!=", "1.0"))
 
+    def test_behavior_when_unavailable(self):
+        mock_alpm = AlpmAPI()
+        mock_alpm.available = False
+
+        self.assertIsNone(mock_alpm.version())
+        self.assertIsNone(mock_alpm.vercmp("1.0", "1.0"))
+        self.assertIsNone(mock_alpm.compare_versions("1.0", "=", "1.0"))
+
+
 # vim: set ts=4 sw=4 et: