diff -r 000000000000 -r 6474c204b198 testing/mozbase/mozfile/tests/stubs.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mozbase/mozfile/tests/stubs.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+import os
+import shutil
+import tempfile
+
+
+# stub file paths
+files = [('foo.txt',),
+         ('foo', 'bar.txt',),
+         ('foo', 'bar', 'fleem.txt',),
+         ('foobar', 'fleem.txt',),
+         ('bar.txt',),
+         ('nested_tree', 'bar', 'fleem.txt',),
+         ('readonly.txt',),
+         ]
+
+
+def create_stub():
+    """create a stub directory"""
+
+    tempdir = tempfile.mkdtemp()
+    try:
+        for path in files:
+            fullpath = os.path.join(tempdir, *path)
+            dirname = os.path.dirname(fullpath)
+            if not os.path.exists(dirname):
+                os.makedirs(dirname)
+            contents = path[-1]
+            f = file(fullpath, 'w')
+            f.write(contents)
+            f.close()
+        return tempdir
+    except Exception, e:
+        try:
+            shutil.rmtree(tempdir)
+        except:
+            pass
+        raise e