spaCy/spacy/tests/en/tokenizer/test_punct.py

# coding: utf-8
"""Test that open, closed and paired punctuation is split off correctly."""


from __future__ import unicode_literals

import pytest

from ....util import compile_prefix_regex
from ....language_data import TOKENIZER_PREFIXES



en_search_prefixes = compile_prefix_regex(TOKENIZER_PREFIXES).search

PUNCT_OPEN = ['(', '[', '{', '*']
PUNCT_CLOSE = [')', ']', '}', '*']
PUNCT_PAIRED = [('(', ')'),  ('[', ']'), ('{', '}'), ('*', '*')]


@pytest.mark.parametrize('text', ["(", "((", "<"])
def test_tokenizer_handles_only_punct(en_tokenizer, text):
    tokens = en_tokenizer(text)
    assert len(tokens) == len(text)


@pytest.mark.parametrize('punct', PUNCT_OPEN)
@pytest.mark.parametrize('text', ["Hello"])
def test_tokenizer_splits_open_punct(en_tokenizer, punct, text):
    tokens = en_tokenizer(punct + text)
    assert len(tokens) == 2
    assert tokens[0].text == punct
    assert tokens[1].text == text


@pytest.mark.parametrize('punct', PUNCT_CLOSE)
@pytest.mark.parametrize('text', ["Hello"])
def test_tokenizer_splits_close_punct(en_tokenizer, punct, text):
    tokens = en_tokenizer(text + punct)
    assert len(tokens) == 2
    assert tokens[0].text == text
    assert tokens[1].text == punct


@pytest.mark.parametrize('punct', PUNCT_OPEN)
@pytest.mark.parametrize('punct_add', ["`"])
@pytest.mark.parametrize('text', ["Hello"])
def test_tokenizer_splits_two_diff_open_punct(en_tokenizer, punct, punct_add, text):
    tokens = en_tokenizer(punct + punct_add + text)
    assert len(tokens) == 3
    assert tokens[0].text == punct
    assert tokens[1].text == punct_add
    assert tokens[2].text == text


@pytest.mark.parametrize('punct', PUNCT_CLOSE)
@pytest.mark.parametrize('punct_add', ["'"])
@pytest.mark.parametrize('text', ["Hello"])
def test_tokenizer_splits_two_diff_close_punct(en_tokenizer, punct, punct_add, text):
    tokens = en_tokenizer(text + punct + punct_add)
    assert len(tokens) == 3
    assert tokens[0].text == text
    assert tokens[1].text == punct
    assert tokens[2].text == punct_add


@pytest.mark.parametrize('punct', PUNCT_OPEN)
@pytest.mark.parametrize('text', ["Hello"])
def test_tokenizer_splits_same_open_punct(en_tokenizer, punct, text):
    tokens = en_tokenizer(punct + punct + punct + text)
    assert len(tokens) == 4
    assert tokens[0].text == punct
    assert tokens[3].text == text


@pytest.mark.parametrize('punct', PUNCT_CLOSE)
@pytest.mark.parametrize('text', ["Hello"])
def test_tokenizer_splits_same_close_punct(en_tokenizer, punct, text):
    tokens = en_tokenizer(text + punct + punct + punct)
    assert len(tokens) == 4
    assert tokens[0].text == text
    assert tokens[1].text == punct


@pytest.mark.parametrize('text', ["'The"])
def test_tokenizer_splits_open_appostrophe(en_tokenizer, text):
    tokens = en_tokenizer(text)
    assert len(tokens) == 2
    assert tokens[0].text == "'"


@pytest.mark.parametrize('text', ["Hello''"])
def test_tokenizer_splits_double_end_quote(en_tokenizer, text):
    tokens = en_tokenizer(text)
    assert len(tokens) == 2
    tokens_punct = en_tokenizer("''")
    assert len(tokens_punct) == 1


@pytest.mark.parametrize('punct_open,punct_close', PUNCT_PAIRED)
@pytest.mark.parametrize('text', ["Hello"])
def test_tokenizer_splits_open_close_punct(en_tokenizer, punct_open, punct_close, text):
    tokens = en_tokenizer(punct_open + text + punct_close)
    assert len(tokens) == 3
    assert tokens[0].text == punct_open
    assert tokens[1].text == text
    assert tokens[2].text == punct_close


@pytest.mark.parametrize('punct_open,punct_close', PUNCT_PAIRED)
@pytest.mark.parametrize('punct_open_add,punct_close_add', [("`", "'")])
@pytest.mark.parametrize('text', ["Hello"])
def test_two_different(en_tokenizer, punct_open, punct_close, punct_open_add, punct_close_add, text):
    tokens = en_tokenizer(punct_open_add + punct_open + text + punct_close + punct_close_add)
    assert len(tokens) == 5
    assert tokens[0].text == punct_open_add
    assert tokens[1].text == punct_open
    assert tokens[2].text == text
    assert tokens[3].text == punct_close
    assert tokens[4].text == punct_close_add


@pytest.mark.parametrize('text,punct', [("(can't", "(")])
def test_tokenizer_splits_pre_punct_regex(text, punct):
    match = en_search_prefixes(text)
    assert match.group() == punct


def test_tokenizer_splits_bracket_period(en_tokenizer):
    text = "(And a 6a.m. run through Washington Park)."
    tokens = en_tokenizer(text)
    assert tokens[len(tokens) - 1].text == "."