def test_map(self):
m = FieldFilter(drop=["a","c"])
self.assertListEqual(["b", "d"], m.filter(self.fields).names())
m = FieldFilter(keep=["a","c"])
self.assertListEqual(["a", "c"], m.filter(self.fields).names())
m = FieldFilter(rename={"a":"x","c":"y"})
self.assertListEqual(["x", "b", "y", "d"], m.filter(self.fields).names())
def test_selectors(self):
m = FieldFilter(keep=["a","c"])
self.assertListEqual([True, False, True, False],
m.field_mask(self.fields))
m = FieldFilter(drop=["b","d"])
self.assertListEqual([True, False, True, False],
m.field_mask(self.fields))
m = FieldFilter()
self.assertListEqual([True, True, True, True],
m.field_mask(self.fields))
