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-rw-r--r--Lib/test/test_csv.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/Lib/test/test_csv.py b/Lib/test/test_csv.py
index 8289ddb..8fb97bc 100644
--- a/Lib/test/test_csv.py
+++ b/Lib/test/test_csv.py
@@ -187,6 +187,10 @@ class Test_Csv(unittest.TestCase):
quoting = csv.QUOTE_ALL)
self._write_test(['a\nb',1], '"a\nb","1"',
quoting = csv.QUOTE_ALL)
+ self._write_test(['a','',None,1], '"a","",,1',
+ quoting = csv.QUOTE_STRINGS)
+ self._write_test(['a','',None,1], '"a","",,"1"',
+ quoting = csv.QUOTE_NOTNULL)
def test_write_escape(self):
self._write_test(['a',1,'p,q'], 'a,1,"p,q"',