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Tests for in-memory forensics cache.
"""
import pytest
from backend.core.cache import ForensicsCache
@pytest.fixture
def cache():
"""Fresh cache instance for each test."""
return ForensicsCache()
@pytest.fixture
def sample_report():
"""Sample forensic report for caching."""
return {
"file_info": {"filename": "test.png"},
"summary": {"ai_probability": 0.3}
}
def test_cache_miss_on_empty(cache, sample_image_bytes):
"""Empty cache returns None."""
result = cache.get(sample_image_bytes)
assert result is None
def test_cache_set_and_get(cache, sample_image_bytes, sample_report):
"""Store and retrieve report correctly."""
cache.set(sample_image_bytes, sample_report)
result = cache.get(sample_image_bytes)
assert result is not None
assert result["summary"]["ai_probability"] == 0.3
def test_cache_hit_adds_metadata(cache, sample_image_bytes, sample_report):
"""Cache hit includes cache_info metadata."""
cache.set(sample_image_bytes, sample_report)
result = cache.get(sample_image_bytes)
assert "cache_info" in result
assert result["cache_info"]["cached"] is True
assert result["cache_info"]["cache_hit"] is True
def test_cache_different_files(cache, sample_image_bytes, sample_report):
"""Different files get different cache entries."""
different_bytes = b"different_file_content"
cache.set(sample_image_bytes, sample_report)
assert cache.get(sample_image_bytes) is not None
assert cache.get(different_bytes) is None
def test_cache_size(cache, sample_image_bytes, sample_report):
"""Cache size increments correctly."""
assert cache.size() == 0
cache.set(sample_image_bytes, sample_report)
assert cache.size() == 1
def test_cache_clear(cache, sample_image_bytes, sample_report):
"""Cache clear removes all entries."""
cache.set(sample_image_bytes, sample_report)
cache.clear()
assert cache.size() == 0
assert cache.get(sample_image_bytes) is None
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