Remove unnecessary write file

1 files changed, 3 insertions, 7 deletions

diff --git a/cmdtest b/cmdtest
index 3b44afe..581b07a 100755
--- a/cmdtest
+++ b/cmdtest
@@ -206,15 +206,11 @@ class CommandTester(cliapp.Application):
         return errors
 
     def diff(self, expected_name, actual_name, diff_name):
-        exit, out, err = self.runcmd_unchecked(['diff', '-u', 
-                                                 expected_name, actual_name])
-        self.write_file(diff_name, out)
+        argv = ['diff', '-u', expected_name, actual_name]
+        with open(diff_name, 'w') as f:
+            exit, out, err = self.runcmd_unchecked(argv, stdout=f)
         return out
 
-    def write_file(self, filename, content):
-        with open(filename, 'w') as f:
-            f.write(content)
-
     def report_timings(self):
 
         def report(key, title):