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"""
Tests for the DLL detection service.
"""
import os
import tempfile
from pathlib import Path
from unittest.mock import Mock, patch
from lsfg_vk.dll_detection import DllDetectionService
from lsfg_vk.constants import LOSSLESS_DLL_NAME
def test_dll_detection_via_env_variable():
"""Test DLL detection via LSFG_DLL_PATH environment variable"""
mock_logger = Mock()
with tempfile.TemporaryDirectory() as temp_dir:
# Create a fake DLL file
dll_path = Path(temp_dir) / LOSSLESS_DLL_NAME
dll_path.write_text("fake dll content")
service = DllDetectionService(logger=mock_logger)
# Test with environment variable set
with patch.dict(os.environ, {"LSFG_DLL_PATH": str(dll_path)}):
result = service.check_lossless_scaling_dll()
assert result["detected"] is True
assert result["path"] == str(dll_path)
assert "LSFG_DLL_PATH" in result["source"]
assert result["error"] is None
def test_dll_detection_via_xdg_data_home():
"""Test DLL detection via XDG_DATA_HOME"""
mock_logger = Mock()
with tempfile.TemporaryDirectory() as temp_dir:
# Create the expected directory structure
steam_dir = Path(temp_dir) / "Steam" / "steamapps" / "common" / "Lossless Scaling"
steam_dir.mkdir(parents=True)
dll_path = steam_dir / LOSSLESS_DLL_NAME
dll_path.write_text("fake dll content")
service = DllDetectionService(logger=mock_logger)
# Test with XDG_DATA_HOME set, no LSFG_DLL_PATH
with patch.dict(os.environ, {"XDG_DATA_HOME": temp_dir}, clear=True):
result = service.check_lossless_scaling_dll()
assert result["detected"] is True
assert result["path"] == str(dll_path)
assert "XDG_DATA_HOME" in result["source"]
assert result["error"] is None
def test_dll_detection_via_home_local_share():
"""Test DLL detection via HOME/.local/share"""
mock_logger = Mock()
with tempfile.TemporaryDirectory() as temp_dir:
# Create the expected directory structure
steam_dir = Path(temp_dir) / ".local" / "share" / "Steam" / "steamapps" / "common" / "Lossless Scaling"
steam_dir.mkdir(parents=True)
dll_path = steam_dir / LOSSLESS_DLL_NAME
dll_path.write_text("fake dll content")
service = DllDetectionService(logger=mock_logger)
# Test with HOME set, no other env vars
env = {"HOME": temp_dir}
with patch.dict(os.environ, env, clear=True):
result = service.check_lossless_scaling_dll()
assert result["detected"] is True
assert result["path"] == str(dll_path)
assert "HOME/.local/share" in result["source"]
assert result["error"] is None
def test_dll_detection_not_found():
"""Test DLL detection when DLL is not found"""
mock_logger = Mock()
service = DllDetectionService(logger=mock_logger)
# Test with no environment variables set
with patch.dict(os.environ, {}, clear=True):
result = service.check_lossless_scaling_dll()
assert result["detected"] is False
assert result["path"] is None
assert result["source"] is None
assert "not found" in result["message"]
assert result["error"] is None
def test_dll_detection_priority():
"""Test that LSFG_DLL_PATH takes priority over other locations"""
mock_logger = Mock()
with tempfile.TemporaryDirectory() as temp_dir1, tempfile.TemporaryDirectory() as temp_dir2:
# Create DLL in both locations
dll_path1 = Path(temp_dir1) / LOSSLESS_DLL_NAME
dll_path1.write_text("fake dll content 1")
steam_dir = Path(temp_dir2) / "Steam" / "steamapps" / "common" / "Lossless Scaling"
steam_dir.mkdir(parents=True)
dll_path2 = steam_dir / LOSSLESS_DLL_NAME
dll_path2.write_text("fake dll content 2")
service = DllDetectionService(logger=mock_logger)
# Set both environment variables
env = {
"LSFG_DLL_PATH": str(dll_path1),
"XDG_DATA_HOME": temp_dir2
}
with patch.dict(os.environ, env, clear=True):
result = service.check_lossless_scaling_dll()
# Should prefer LSFG_DLL_PATH
assert result["detected"] is True
assert result["path"] == str(dll_path1)
assert "LSFG_DLL_PATH" in result["source"]
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