Move cat method to cmdtestlib

1 files changed, 9 insertions, 0 deletions

diff --git a/cmdtestlib.py b/cmdtestlib.py
index 59a3879..460ab16 100644
--- a/cmdtestlib.py
+++ b/cmdtestlib.py
@@ -20,6 +20,15 @@ __version__ = '0.3'
 import os
 
 
+def cat(filename):
+    '''Return contents of file, or empty string if it doesn't exist.'''
+    if os.path.exists(filename):
+        with open(filename) as f:
+            return f.read()
+    else:
+        return ''
+
+
 class TestCase(object):
 
     def __init__(self, name, path_prefix):