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import pytest
from nltk.data import find
from nltk.parse.bllip import BllipParser
from nltk.tree import Tree
@pytest.fixture(scope="module")
def parser():
model_dir = find("models/bllip_wsj_no_aux").path
return BllipParser.from_unified_model_dir(model_dir)
def setup_module():
pytest.importorskip("bllipparser")
class TestBllipParser:
def test_parser_loads_a_valid_tree(self, parser):
parsed = parser.parse("I saw the man with the telescope")
tree = next(parsed)
assert isinstance(tree, Tree)
assert (
tree.pformat()
== """
(S1
(S
(NP (PRP I))
(VP
(VBD saw)
(NP (DT the) (NN man))
(PP (IN with) (NP (DT the) (NN telescope))))))
""".strip()
)
def test_tagged_parse_finds_matching_element(self, parser):
parsed = parser.parse("I saw the man with the telescope")
tagged_tree = next(parser.tagged_parse([("telescope", "NN")]))
assert isinstance(tagged_tree, Tree)
assert tagged_tree.pformat() == "(S1 (NP (NN telescope)))"
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