pitrou commented on a change in pull request #10321:
URL: https://github.com/apache/arrow/pull/10321#discussion_r640038839



##########
File path: python/pyarrow/tests/test_csv.py
##########
@@ -52,18 +52,20 @@ def generate_col_names():
             yield first + second
 
 
-def make_random_csv(num_cols=2, num_rows=10, linesep='\r\n'):
+def make_random_csv(num_cols=2, num_rows=10, linesep='\r\n', write_names=True):
     arr = np.random.RandomState(42).randint(0, 1000, size=(num_cols, num_rows))
-    col_names = list(itertools.islice(generate_col_names(), num_cols))
     csv = io.StringIO()
-    csv.write(",".join(col_names))
+    if write_names:
+        col_names = list(itertools.islice(generate_col_names(), num_cols))
+        csv.write(",".join(col_names))
     csv.write(linesep)
     for row in arr.T:
         csv.write(",".join(map(str, row)))
         csv.write(linesep)
     csv = csv.getvalue().encode()
     columns = [pa.array(a, type=pa.int64()) for a in arr]
-    expected = pa.Table.from_arrays(columns, col_names)
+    expected = pa.Table.from_arrays(
+        columns, col_names) if write_names else None

Review comment:
       Well, the test should ensure that the column names are the same.




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