spaCy/spacy/tests/vocab_vectors/test_stringstore.py

# coding: utf-8
from __future__ import unicode_literals

import pytest
from spacy.strings import StringStore


@pytest.fixture
def stringstore():
    return StringStore()


def test_string_hash(stringstore):
    """Test that string hashing is stable across platforms"""
    assert stringstore.add("apple") == 8566208034543834098
    heart = "\U0001f499"
    h = stringstore.add(heart)
    assert h == 11841826740069053588


def test_stringstore_from_api_docs(stringstore):
    apple_hash = stringstore.add("apple")
    assert apple_hash == 8566208034543834098
    assert stringstore[apple_hash] == "apple"
    assert "apple" in stringstore
    assert "cherry" not in stringstore
    orange_hash = stringstore.add("orange")
    all_strings = [s for s in stringstore]
    assert all_strings == ["apple", "orange"]
    banana_hash = stringstore.add("banana")
    assert len(stringstore) == 3
    assert banana_hash == 2525716904149915114
    assert stringstore[banana_hash] == "banana"
    assert stringstore["banana"] == banana_hash


@pytest.mark.parametrize("text1,text2,text3", [(b"Hello", b"goodbye", b"hello")])
def test_stringstore_save_bytes(stringstore, text1, text2, text3):
    key = stringstore.add(text1)
    assert stringstore[text1] == key
    assert stringstore[text2] != key
    assert stringstore[text3] != key


@pytest.mark.parametrize("text1,text2,text3", [("Hello", "goodbye", "hello")])
def test_stringstore_save_unicode(stringstore, text1, text2, text3):
    key = stringstore.add(text1)
    assert stringstore[text1] == key
    assert stringstore[text2] != key
    assert stringstore[text3] != key


@pytest.mark.parametrize("text", [b"A"])
def test_stringstore_retrieve_id(stringstore, text):
    key = stringstore.add(text)
    assert len(stringstore) == 1
    assert stringstore[key] == text.decode("utf8")
    with pytest.raises(KeyError):
        stringstore[20000]


@pytest.mark.parametrize("text1,text2", [(b"0123456789", b"A")])
def test_stringstore_med_string(stringstore, text1, text2):
    store = stringstore.add(text1)
    assert stringstore[store] == text1.decode("utf8")
    dummy = stringstore.add(text2)
    assert stringstore[text1] == store


def test_stringstore_long_string(stringstore):
    text = "INFORMATIVE](http://www.google.com/search?as_q=RedditMonkey&hl=en&num=50&btnG=Google+Search&as_epq=&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=any&as_dt=i&as_sitesearch=&as_rights=&safe=off"
    store = stringstore.add(text)
    assert stringstore[store] == text


@pytest.mark.parametrize("factor", [254, 255, 256])
def test_stringstore_multiply(stringstore, factor):
    text = "a" * factor
    store = stringstore.add(text)
    assert stringstore[store] == text


def test_stringstore_massive_strings(stringstore):
    text = "a" * 511
    store = stringstore.add(text)
    assert stringstore[store] == text
    text2 = "z" * 512
    store = stringstore.add(text2)
    assert stringstore[store] == text2
    text3 = "1" * 513
    store = stringstore.add(text3)
    assert stringstore[store] == text3


@pytest.mark.parametrize("text", ["qqqqq"])
def test_stringstore_to_bytes(stringstore, text):
    store = stringstore.add(text)
    serialized = stringstore.to_bytes()
    new_stringstore = StringStore().from_bytes(serialized)
    assert new_stringstore[store] == text


@pytest.mark.xfail
@pytest.mark.parametrize("text", [["a", "b", "c"]])
def test_stringstore_freeze_oov(stringstore, text):
    """Test the possibly temporary workaround of flushing the stringstore of
    OOV words."""
    assert stringstore[text[0]] == 1
    assert stringstore[text[1]] == 2

    stringstore.set_frozen(True)
    s = stringstore[text[2]]
    assert s >= 4
    s_ = stringstore[s]
    assert s_ == text[2]

    stringstore.flush_oov()
    with pytest.raises(IndexError):
        s_ = stringstore[s]