Enable clamav integration tests on Travis CI

.travis.yml

@@ -5,6 +5,10 @@ python:
   - "3.6"
   - "3.7"
 # command to install dependencies
+addons:
+  apt:
+    packages:
+      - clamav-daemon
 install:
   - pip install tox-travis coveralls
 # command to run tests
@@ -16,7 +20,7 @@ notifications:
 after_script:
   - coveralls
 matrix:
-   allow_failures:
-      - python: "3.5"
-      - python: "3.6"
-      - python: "3.7"
+  allow_failures:
+    - python: "3.5"
+    - python: "3.6"
+    - python: "3.7"

tests/test_clamav.py

@@ -51,6 +51,10 @@ class TestClamav (unittest.TestCase):
            'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAW0NMQU1BVl' \
            '0AEAAAABAAAAACAAABAAAAAAAAAAAAAAAAAAAAAAAAwA==">t</a>'
         infected, errors = clamav.scan(data, self.clamav_conf)
-        msg = 'stream: ClamAV-Test-File(2d1206194bd704385e37000be6113f73:781) FOUND\n'
-        self.assertTrue(msg in infected)
+        # different versions of clamav report different responses, apparently
+        acceptable_responses = (
+            ['stream: ClamAV-Test-File(2d1206194bd704385e37000be6113f73:781) FOUND\n'],
+            ['stream: Clamav.Test.File-6(aa15bcf478d165efd2065190eb473bcb:544) FOUND\n'],
+        )
+        self.assertIn(infected, acceptable_responses)
         self.assertFalse(errors)