"""Tests for the web interface's in-memory cache helpers."""
import pytest

from web_interface.cache import delete_cached, get_cached, invalidate_cache, set_cached


@pytest.fixture(autouse=True)
def clean_cache():
    invalidate_cache()
    yield
    invalidate_cache()


def test_set_and_get():
    set_cached('key', 'value')
    assert get_cached('key') == 'value'


def test_get_missing_returns_none():
    assert get_cached('missing') is None


def test_delete_cached_removes_key():
    set_cached('fonts_catalog', ['a-font'])
    delete_cached('fonts_catalog')
    assert get_cached('fonts_catalog') is None


def test_delete_cached_missing_key_is_noop():
    delete_cached('never-set')  # must not raise


def test_invalidate_cache_pattern():
    set_cached('fonts_catalog', 1)
    set_cached('plugins_list', 2)
    invalidate_cache('fonts')
    assert get_cached('fonts_catalog') is None
    assert get_cached('plugins_list') == 2