test_csv_dataset_quotechar test is not covered for Windows envirment

[zhangguanheng66]

Here is the test

text/test/data/test_dataset.py

Lines 169 to 202 in 2aa8858

	@unittest.skipIf(sys.platform == "win32", "FIXME: tempfile could not be opened twice on Windows")
	def test_csv_dataset_quotechar(self):
	# Based on issue #349
	example_data = [("text", "label"),
	('" hello world', "0"),
	('goodbye " world', "1"),
	('this is a pen " ', "0")]
	with tempfile.NamedTemporaryFile(dir=self.test_dir) as f:
	for example in example_data:
	f.write("{}\n".format(",".join(example)).encode("latin-1"))
	TEXT = data.Field(lower=True, tokenize=lambda x: x.split())
	fields = {
	"label": ("label", data.Field(use_vocab=False,
	sequential=False)),
	"text": ("text", TEXT)
	}
	f.seek(0)
	dataset = data.TabularDataset(
	path=f.name, format="csv",
	skip_header=False, fields=fields,
	csv_reader_params={"quotechar": None})
	TEXT.build_vocab(dataset)
	self.assertEqual(len(dataset), len(example_data) - 1)
	for i, example in enumerate(dataset):
	self.assertEqual(example.text,
	example_data[i + 1][0].lower().split())
	self.assertEqual(example.label, example_data[i + 1][1])