TST: Test empty input for read_csv (pandas-dev#14867)

Author: jeffcarey

pandas/io/tests/parser/test_textreader.py

@@ -32,6 +32,7 @@ def setUp(self):
         self.csv1 = os.path.join(self.dirpath, 'test1.csv')
         self.csv2 = os.path.join(self.dirpath, 'test2.csv')
         self.xls1 = os.path.join(self.dirpath, 'test.xls')
+        self.blankcsv = os.path.join(self.dirpath, 'blank.csv')
 
     def test_file_handle(self):
         try:
@@ -392,6 +393,15 @@ def test_empty_field_eof(self):
                           names=list('abcd'), engine='c')
             assert_frame_equal(df, c)
 
+    def test_empty_csv_input(self):
+        # GH14867
+        df1 = read_csv(StringIO(), chunksize=20, header=None,
+        names=['a', 'b', 'c'])
+        self.assertTrue(isinstance(df1, TextFileReader))
+
+        df2 = read_csv(self.blankcsv, chunksize=20,
+            header=None, names=['a', 'b', 'c'])
+        self.assertTrue(isinstance(df2, TextFileReader))
 
 def assert_array_dicts_equal(left, right):
     for k, v in compat.iteritems(left):