from spacy.util import filter_spans
from pydantic import ValidationError
from spacy.schemas import TokenPattern, TokenPatternSchema
import pytest


def test_issue6207(en_tokenizer):
    doc = en_tokenizer("zero one two three four five six")

    # Make spans
    s1 = doc[:4]
    s2 = doc[3:6]  # overlaps with s1
    s3 = doc[5:7]  # overlaps with s2, not s1

    result = filter_spans((s1, s2, s3))
    assert s1 in result
    assert s2 not in result
    assert s3 in result


def test_issue6258():
    """Test that the non-empty constraint pattern field is respected"""
    # These one is valid
    TokenPatternSchema(pattern=[TokenPattern()])
    # But an empty pattern list should fail to validate
    # based on the schema's constraint
    with pytest.raises(ValidationError):
        TokenPatternSchema(pattern=[])