def test__bool__(self):
assert not Lnk(None)
assert not Lnk.charspan(-1, -1)
assert Lnk.charspan(0, 0)
assert Lnk.chartspan(0, 0)
assert Lnk.tokens([])
assert Lnk.edge(0)
def testTokensLnk(self):
lnk = Lnk.tokens([1, 2, 3])
assert lnk.type == Lnk.TOKENS
assert lnk.data == (1, 2, 3)
assert str(lnk) == '<1 2 3>'
repr(lnk) # no error
lnk = Lnk.tokens(['1'])
assert lnk.data == (1, )
# empty tokens list might be invalid, but accept for now
lnk = Lnk.tokens([])
assert lnk.data == tuple()
with pytest.raises(TypeError):
Lnk.tokens(1)
with pytest.raises(ValueError):
Lnk.tokens(['a', 'b'])