Fix checking for whether files exist

The previous code would check whether a file exists, but we
need it to check whether the file is in the list of files
given. This is important for unit tests to work.

1 files changed, 2 insertions, 2 deletions

diff --git a/cmdtestlib.py b/cmdtestlib.py
index a064cbc..8c63d37 100644
--- a/cmdtestlib.py
+++ b/cmdtestlib.py
@@ -46,8 +46,8 @@ class TestDir(object):
 
         script_names = ['setup_once', 'setup', 'teardown', 'teardown_once']
         for name in script_names:
-            full_path = os.path.join(dirname, name)
-            if os.path.exists(full_path):
+            if name in filenames:
+                full_path = os.path.join(dirname, name)
                 setattr(self, name, full_path)
 
         prefixes = self.find_prefixes(filenames)