spaCy/spacy/tests/doc/test_doc_api.py

# coding: utf-8
from __future__ import unicode_literals

import pytest
import numpy
from spacy.tokens import Doc
from spacy.vocab import Vocab
from spacy.attrs import LEMMA

from ..util import get_doc


@pytest.mark.parametrize("text", [["one", "two", "three"]])
def test_doc_api_compare_by_string_position(en_vocab, text):
    doc = Doc(en_vocab, words=text)
    # Get the tokens in this order, so their ID ordering doesn't match the idx
    token3 = doc[-1]
    token2 = doc[-2]
    token1 = doc[-1]
    token1, token2, token3 = doc
    assert token1 < token2 < token3
    assert not token1 > token2
    assert token2 > token1
    assert token2 <= token3
    assert token3 >= token1


def test_doc_api_getitem(en_tokenizer):
    text = "Give it back! He pleaded."
    tokens = en_tokenizer(text)
    assert tokens[0].text == "Give"
    assert tokens[-1].text == "."
    with pytest.raises(IndexError):
        tokens[len(tokens)]

    def to_str(span):
        return "/".join(token.text for token in span)

    span = tokens[1:1]
    assert not to_str(span)
    span = tokens[1:4]
    assert to_str(span) == "it/back/!"
    span = tokens[1:4:1]
    assert to_str(span) == "it/back/!"
    with pytest.raises(ValueError):
        tokens[1:4:2]
    with pytest.raises(ValueError):
        tokens[1:4:-1]

    span = tokens[-3:6]
    assert to_str(span) == "He/pleaded"
    span = tokens[4:-1]
    assert to_str(span) == "He/pleaded"
    span = tokens[-5:-3]
    assert to_str(span) == "back/!"
    span = tokens[5:4]
    assert span.start == span.end == 5 and not to_str(span)
    span = tokens[4:-3]
    assert span.start == span.end == 4 and not to_str(span)

    span = tokens[:]
    assert to_str(span) == "Give/it/back/!/He/pleaded/."
    span = tokens[4:]
    assert to_str(span) == "He/pleaded/."
    span = tokens[:4]
    assert to_str(span) == "Give/it/back/!"
    span = tokens[:-3]
    assert to_str(span) == "Give/it/back/!"
    span = tokens[-3:]
    assert to_str(span) == "He/pleaded/."

    span = tokens[4:50]
    assert to_str(span) == "He/pleaded/."
    span = tokens[-50:4]
    assert to_str(span) == "Give/it/back/!"
    span = tokens[-50:-40]
    assert span.start == span.end == 0 and not to_str(span)
    span = tokens[40:50]
    assert span.start == span.end == 7 and not to_str(span)

    span = tokens[1:4]
    assert span[0].orth_ == "it"
    subspan = span[:]
    assert to_str(subspan) == "it/back/!"
    subspan = span[:2]
    assert to_str(subspan) == "it/back"
    subspan = span[1:]
    assert to_str(subspan) == "back/!"
    subspan = span[:-1]
    assert to_str(subspan) == "it/back"
    subspan = span[-2:]
    assert to_str(subspan) == "back/!"
    subspan = span[1:2]
    assert to_str(subspan) == "back"
    subspan = span[-2:-1]
    assert to_str(subspan) == "back"
    subspan = span[-50:50]
    assert to_str(subspan) == "it/back/!"
    subspan = span[50:-50]
    assert subspan.start == subspan.end == 4 and not to_str(subspan)


@pytest.mark.parametrize(
    "text", ["Give it back! He pleaded.", " Give it back! He pleaded. "]
)
def test_doc_api_serialize(en_tokenizer, text):
    tokens = en_tokenizer(text)
    new_tokens = Doc(tokens.vocab).from_bytes(tokens.to_bytes())
    assert tokens.text == new_tokens.text
    assert [t.text for t in tokens] == [t.text for t in new_tokens]
    assert [t.orth for t in tokens] == [t.orth for t in new_tokens]

    new_tokens = Doc(tokens.vocab).from_bytes(
        tokens.to_bytes(tensor=False), tensor=False
    )
    assert tokens.text == new_tokens.text
    assert [t.text for t in tokens] == [t.text for t in new_tokens]
    assert [t.orth for t in tokens] == [t.orth for t in new_tokens]

    new_tokens = Doc(tokens.vocab).from_bytes(
        tokens.to_bytes(sentiment=False), sentiment=False
    )
    assert tokens.text == new_tokens.text
    assert [t.text for t in tokens] == [t.text for t in new_tokens]
    assert [t.orth for t in tokens] == [t.orth for t in new_tokens]


def test_doc_api_set_ents(en_tokenizer):
    text = "I use goggle chrone to surf the web"
    tokens = en_tokenizer(text)
    assert len(tokens.ents) == 0
    tokens.ents = [(tokens.vocab.strings["PRODUCT"], 2, 4)]
    assert len(list(tokens.ents)) == 1
    assert [t.ent_iob for t in tokens] == [0, 0, 3, 1, 0, 0, 0, 0]
    assert tokens.ents[0].label_ == "PRODUCT"
    assert tokens.ents[0].start == 2
    assert tokens.ents[0].end == 4


def test_doc_api_merge(en_tokenizer):
    text = "WKRO played songs by the beach boys all night"

    # merge 'The Beach Boys'
    doc = en_tokenizer(text)
    assert len(doc) == 9
    doc.merge(
        doc[4].idx,
        doc[6].idx + len(doc[6]),
        tag="NAMED",
        lemma="LEMMA",
        ent_type="TYPE",
    )
    assert len(doc) == 7
    assert doc[4].text == "the beach boys"
    assert doc[4].text_with_ws == "the beach boys "
    assert doc[4].tag_ == "NAMED"

    # merge 'all night'
    doc = en_tokenizer(text)
    assert len(doc) == 9
    doc.merge(
        doc[7].idx,
        doc[8].idx + len(doc[8]),
        tag="NAMED",
        lemma="LEMMA",
        ent_type="TYPE",
    )
    assert len(doc) == 8
    assert doc[7].text == "all night"
    assert doc[7].text_with_ws == "all night"


def test_doc_api_merge_children(en_tokenizer):
    """Test that attachments work correctly after merging."""
    text = "WKRO played songs by the beach boys all night"
    doc = en_tokenizer(text)
    assert len(doc) == 9
    doc.merge(
        doc[4].idx,
        doc[6].idx + len(doc[6]),
        tag="NAMED",
        lemma="LEMMA",
        ent_type="TYPE",
    )

    for word in doc:
        if word.i < word.head.i:
            assert word in list(word.head.lefts)
        elif word.i > word.head.i:
            assert word in list(word.head.rights)


def test_doc_api_merge_hang(en_tokenizer):
    text = "through North and South Carolina"
    doc = en_tokenizer(text)
    doc.merge(18, 32, tag="", lemma="", ent_type="ORG")
    doc.merge(8, 32, tag="", lemma="", ent_type="ORG")


def test_doc_api_retokenizer(en_tokenizer):
    doc = en_tokenizer("WKRO played songs by the beach boys all night")
    with doc.retokenize() as retokenizer:
        retokenizer.merge(doc[4:7])
    assert len(doc) == 7
    assert doc[4].text == "the beach boys"


def test_doc_api_retokenizer_attrs(en_tokenizer):
    doc = en_tokenizer("WKRO played songs by the beach boys all night")
    # test both string and integer attributes and values
    attrs = {LEMMA: "boys", "ENT_TYPE": doc.vocab.strings["ORG"]}
    with doc.retokenize() as retokenizer:
        retokenizer.merge(doc[4:7], attrs=attrs)
    assert len(doc) == 7
    assert doc[4].text == "the beach boys"
    assert doc[4].lemma_ == "boys"
    assert doc[4].ent_type_ == "ORG"


@pytest.mark.xfail
def test_doc_api_retokenizer_lex_attrs(en_tokenizer):
    """Test that lexical attributes can be changed (see #2390)."""
    doc = en_tokenizer("WKRO played beach boys songs")
    assert not any(token.is_stop for token in doc)
    with doc.retokenize() as retokenizer:
        retokenizer.merge(doc[2:4], attrs={"LEMMA": "boys", "IS_STOP": True})
    assert doc[2].text == "beach boys"
    assert doc[2].lemma_ == "boys"
    assert doc[2].is_stop
    new_doc = Doc(doc.vocab, words=["beach boys"])
    assert new_doc[0].is_stop


def test_doc_api_sents_empty_string(en_tokenizer):
    doc = en_tokenizer("")
    doc.is_parsed = True
    sents = list(doc.sents)
    assert len(sents) == 0


def test_doc_api_runtime_error(en_tokenizer):
    # Example that caused run-time error while parsing Reddit
    # fmt: off
    text = "67% of black households are single parent \n\n72% of all black babies born out of wedlock \n\n50% of all black kids don\u2019t finish high school"
    deps = ["nsubj", "prep", "amod", "pobj", "ROOT", "amod", "attr", "",
            "nummod", "prep", "det", "amod", "pobj", "acl", "prep", "prep",
            "pobj", "", "nummod", "prep", "det", "amod", "pobj", "aux", "neg",
            "ROOT", "amod", "dobj"]
    # fmt: on

    tokens = en_tokenizer(text)
    doc = get_doc(tokens.vocab, words=[t.text for t in tokens], deps=deps)

    nps = []
    for np in doc.noun_chunks:
        while len(np) > 1 and np[0].dep_ not in ("advmod", "amod", "compound"):
            np = np[1:]
        if len(np) > 1:
            nps.append(
                (np.start_char, np.end_char, np.root.tag_, np.text, np.root.ent_type_)
            )
    for np in nps:
        start, end, tag, lemma, ent_type = np
        doc.merge(start, end, tag=tag, lemma=lemma, ent_type=ent_type)


def test_doc_api_right_edge(en_tokenizer):
    """Test for bug occurring from Unshift action, causing incorrect right edge"""
    # fmt: off
    text = "I have proposed to myself, for the sake of such as live under the government of the Romans, to translate those books into the Greek tongue."
    heads = [2, 1, 0, -1, -1, -3, 15, 1, -2, -1, 1, -3, -1, -1, 1, -2, -1, 1,
             -2, -7, 1, -19, 1, -2, -3, 2, 1, -3, -26]
    # fmt: on

    tokens = en_tokenizer(text)
    doc = get_doc(tokens.vocab, words=[t.text for t in tokens], heads=heads)
    assert doc[6].text == "for"
    subtree = [w.text for w in doc[6].subtree]
    assert subtree == [
        "for",
        "the",
        "sake",
        "of",
        "such",
        "as",
        "live",
        "under",
        "the",
        "government",
        "of",
        "the",
        "Romans",
        ",",
    ]
    assert doc[6].right_edge.text == ","


def test_doc_api_has_vector():
    vocab = Vocab()
    vocab.reset_vectors(width=2)
    vocab.set_vector("kitten", vector=numpy.asarray([0.0, 2.0], dtype="f"))
    doc = Doc(vocab, words=["kitten"])
    assert doc.has_vector


def test_doc_api_similarity_match():
    doc = Doc(Vocab(), words=["a"])
    with pytest.warns(None):
        assert doc.similarity(doc[0]) == 1.0
        assert doc.similarity(doc.vocab["a"]) == 1.0
    doc2 = Doc(doc.vocab, words=["a", "b", "c"])
    with pytest.warns(None):
        assert doc.similarity(doc2[:1]) == 1.0
        assert doc.similarity(doc2) == 0.0


def test_lowest_common_ancestor(en_tokenizer):
    tokens = en_tokenizer("the lazy dog slept")
    doc = get_doc(tokens.vocab, words=[t.text for t in tokens], heads=[2, 1, 1, 0])
    lca = doc.get_lca_matrix()
    assert lca[1, 1] == 1
    assert lca[0, 1] == 2
    assert lca[1, 2] == 2


def test_parse_tree(en_tokenizer):
    """Tests doc.print_tree() method."""
    text = "I like New York in Autumn."
    heads = [1, 0, 1, -2, -3, -1, -5]
    tags = ["PRP", "IN", "NNP", "NNP", "IN", "NNP", "."]
    tokens = en_tokenizer(text)
    doc = get_doc(tokens.vocab, words=[t.text for t in tokens], heads=heads, tags=tags)
    # full method parse_tree(text) is a trivial composition
    trees = doc.print_tree()
    assert len(trees) > 0
    tree = trees[0]
    assert all(
        k in list(tree.keys())
        for k in ["word", "lemma", "NE", "POS_fine", "POS_coarse", "arc", "modifiers"]
    )
    assert tree["word"] == "like"  # check root is correct