tests/test-atomictempfile.py

--- a/tests/test-atomictempfile.py	Thu Jun 23 18:18:33 2016 +0100
+++ b/tests/test-atomictempfile.py	Thu Jun 23 18:20:58 2016 +0100
@@ -89,6 +89,13 @@
             # on other faster platforms can detect problems
             pass
 
+    def testread(self):
+        with open(self._filename, 'wb') as f:
+            f.write(b'foobar\n')
+        file = atomictempfile(self._filename, mode='rb')
+        self.assertTrue(file.read(), b'foobar\n')
+        file.discard()
+
 if __name__ == '__main__':
     import silenttestrunner
     silenttestrunner.main(__name__)