Minor cleanups to atomic_helper and add unit tests.

Change atomic_helper.write_file to have same same signature as write_file.
Add some simple unit tests for atomic_helper.

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/unittests/helpers.py b/tests/unittests/helpers.py
index de2cf638..1cdc05a1 100644
--- a/tests/unittests/helpers.py
+++ b/tests/unittests/helpers.py
@@ -252,6 +252,20 @@ class HttprettyTestCase(TestCase):
         super(HttprettyTestCase, self).tearDown()
 
 
+class TempDirTestCase(TestCase):
+    # provide a tempdir per class, not per test.
+    def setUp(self):
+        super(TempDirTestCase, self).setUp()
+        self.tmp = tempfile.mkdtemp()
+        self.addCleanup(shutil.rmtree, self.tmp)
+
+    def tmp_path(self, path):
+        if path.startswith(os.path.sep):
+            path = "." + path
+
+        return os.path.normpath(os.path.join(self.tmp, path))
+
+
 def populate_dir(path, files):
     if not os.path.exists(path):
         os.makedirs(path)