Merged revisions 78384 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r78384 | dirkjan.ochtman | 2010-02-23 16:09:52 -0500 (Tue, 23 Feb 2010) | 4 lines
Fix #1537721: add writeheader() method to csv.DictWriter.
Reviewed by skip.montanaro and thomas.wouters.
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diff --git a/Lib/test/test_csv.py b/Lib/test/test_csv.py
index 29e54f7..2c4b783 100644
--- a/Lib/test/test_csv.py
+++ b/Lib/test/test_csv.py
@@ -535,8 +535,12 @@
def test_write_simple_dict(self):
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"])
+ writer.writeheader()
+ fileobj.seek(0)
+ self.assertEqual(fileobj.readline(), "f1,f2,f3\r\n")
writer.writerow({"f1": 10, "f3": "abc"})
fileobj.seek(0)
+ fileobj.readline() # header
self.assertEqual(fileobj.read(), "10,,abc\r\n")
def test_write_no_fields(self):