Fix diffing so it actually produces output.

1 files changed, 3 insertions, 3 deletions

diff --git a/cmdtest b/cmdtest
index b4d797a..7fc0d67 100755
--- a/cmdtest
+++ b/cmdtest
@@ -154,14 +154,14 @@ class CommandTester(cliapp.Application):
     def diff(self, expected, actual):
         e = os.path.join(self.tempdir, 'expected')
         a = os.path.join(self.tempdir, 'actual')
+        self.write_file(e, expected)
+        self.write_file(a, actual)
         exit, out, err = self.runcmd_unchecked(['diff', '-u', e, a])
         return out
 
-    def write_file(self, basename, content):
-        filename = os.path.join(self.tempdir, basename)
+    def write_file(self, filename, content):
         with open(filename, 'w') as f:
             f.write(content)
-        return filename
 
 
 if __name__ == '__main__':