def test_writeheader(self):
fieldnames = [
'a.b.c', 'a.d[].e', 'a.c[][]', 'b', 'b.d[0]', 'b.d[1]', 'b.d[0]'
]
w = NestedDictWriter(self.f, fieldnames)
w.writeheader()
self.assertEqual(self.read_all(), [fieldnames])
def test_writeheader_empty(self):
fieldnames = []
w = NestedDictWriter(self.f, fieldnames)
w.writeheader()
self.assertEqual(self.read_all(), [fieldnames])