tests/test_paths.py: Add an 'always' warning filter, so it is reliable

Previously, the warning was not always issued, causing the test to
fail in some cases.

Also change the assertions to use the assert* methods of unittest,
and check that md5 and hash are mentioned in the deprecation
message.

Thanks: Adam Conrad
Gbp-Dch: ignore

1 files changed, 6 insertions, 2 deletions

diff --git a/tests/test_paths.py b/tests/test_paths.py
index 222848f7..d647e6e2 100644
--- a/tests/test_paths.py
+++ b/tests/test_paths.py
@@ -42,13 +42,17 @@ class TestPath(unittest.TestCase):
         AcquireFile
         """
         with warnings.catch_warnings(record=True) as caught_warnings:
+            warnings.simplefilter("always")
             apt_pkg.AcquireFile(
                 apt_pkg.Acquire(), "http://example.com",
                 destfile=self.file_bytes,
                 md5="abcdef")
 
-        assert len(caught_warnings) == 1
-        assert issubclass(caught_warnings[0].category, DeprecationWarning)
+        self.assertEqual(len(caught_warnings), 1)
+        self.assertTrue(issubclass(caught_warnings[0].category,
+                                   DeprecationWarning))
+        self.assertIn("md5", str(caught_warnings[0].message))
+        self.assertIn("hash", str(caught_warnings[0].message))
 
         apt_pkg.AcquireFile(
             apt_pkg.Acquire(), "http://example.com",