def test_clear_resets_presence():
tag = Flag('wanderer')
tag.touch()
assert tag.present
tag.clear()
assert not tag.present
def test_bool_truthy_when_present():
tag = Flag('foreign')
assert not tag
tag.touch()
assert tag
def test_not_filled_with_no_values():
flag = Flag('wanderer')
flag.touch()
assert not flag.filled
def test_update_from_flag_copies_presence(self):
copyable = Flag('wanderer')
copyable.touch()
tag = Flag('wanderer')
tag.update(copyable)
assert tag.present
def test_present_with_no_values():
flag = Flag('wanderer')
flag.touch()
assert flag.present
def test_required_with_no_values_passes(self):
tag = Flag('type', required=True)
tag.touch()
tag.validate()
assert tag.valid
def test_header_filled_with_no_values():
flag = Flag('wanderer')
flag.touch()
header = flag.to_header()
assert '@wanderer' in header