def test_headerData(self):
model = ColumnDtypeModel()
ret = model.headerData(0, Qt.Horizontal)
assert ret == 'column'
ret = model.headerData(1, Qt.Horizontal)
assert ret == 'data type'
ret = model.headerData(2, Qt.Horizontal)
assert ret == None
ret = model.headerData(0, Qt.Horizontal, Qt.EditRole)
assert ret == None
ret = model.headerData(0, Qt.Vertical)
assert ret == None
