import pytest


@pytest.mark.models
def test_nsubj(EN):
    sent = EN(u'A base phrase should be recognized.')
    base_nps = list(sent.noun_chunks)
    assert len(base_nps) == 1
    assert base_nps[0].string == 'A base phrase '


@pytest.mark.models
def test_coord(EN):
    sent = EN(u'A base phrase and a good phrase are often the same.')
    base_nps = list(sent.noun_chunks)
    assert len(base_nps) == 2
    assert base_nps[0].string == 'A base phrase '
    assert base_nps[1].string == 'a good phrase '


@pytest.mark.models
def test_pp(EN):
    sent = EN(u'A phrase with another phrase occurs')
    base_nps = list(sent.noun_chunks)
    assert len(base_nps) == 2
    assert base_nps[0].string == 'A phrase '
    assert base_nps[1].string == 'another phrase ' 


@pytest.mark.models
def test_merge_pp(EN):
    sent = EN(u'A phrase with another phrase occurs')
    nps = [(np[0].idx, np[-1].idx + len(np[-1]), np[0].ent_type_) for np in sent.noun_chunks]

    for start, end, ent_type in nps:
        sent.merge(start, end, u'NP', np.lemma_, ent_type)
    assert sent[0].string == 'A phrase '
    assert sent[1].string == 'with '
    assert sent[2].string == 'another phrase '
    assert sent[3].string == 'occurs'