Skip debian tests on non-debian systems.

ognibuild/tests/__init__.py

@@ -17,14 +17,16 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 # MA  02110-1301, USA.
 
+import os
 import unittest
 
 
 def test_suite():
     names = [
         "debian_build",
-        "debian_fix_build",
     ]
+    if os.path.exists("/usr/bin/dpkg-architecture"):
+        names.append("debian_fix_build")
     module_names = ["ognibuild.tests.test_" + name for name in names]
     loader = unittest.TestLoader()
     return loader.loadTestsFromNames(module_names)

ognibuild/tests/test_debian_fix_build.py

@@ -65,8 +65,6 @@ class DummyAptSearcher(FileSearcher):
 class ResolveErrorTests(TestCaseWithTransport):
     def setUp(self):
         super(ResolveErrorTests, self).setUp()
-        if not os.path.exists("/usr/bin/dpkg-architecture"):
-            self.skipTest("not a debian system")
         self.tree = self.make_branch_and_tree(".")
         self.build_tree_contents(
             [