"""Test encoding support for diff files."""
import pytest
from pathlib import Path
from src.tools import DiffChunkTools
class TestEncodings:
"""Test encoding detection and parsing."""
@pytest.fixture
def test_data_dir(self):
return Path(__file__).parent / "test_data"
@pytest.fixture
def tools(self):
return DiffChunkTools()
def test_encoding_support(self, tools, test_data_dir):
"""Test that various encodings are supported."""
test_files = [
"minimal_working.diff", # UTF-8
"minimal_windows.diff", # Windows line endings
"minimal_bom.diff", # UTF-8 BOM
"minimal_latin1.diff", # Latin-1
]
for filename in test_files:
result = tools.load_diff(str(test_data_dir / filename))
assert result["chunks"] > 0, f"{filename} should parse successfully"
assert result["files"] > 0, f"{filename} should contain files"
def test_encoding_detection(self, tools, tmp_path):
"""Test encoding detection with UTF-16."""
# Create a minimal UTF-16 diff file
content = """diff --git a/test.txt b/test.txt
index 1234567..abcdefg 100644
--- a/test.txt
+++ b/test.txt
@@ -1 +1 @@
-old line
+new line
"""
utf16_file = tmp_path / "test_utf16.diff"
utf16_file.write_text(content, encoding="utf-16")
result = tools.load_diff(str(utf16_file))
assert result["chunks"] > 0
assert result["files"] > 0
def test_empty_diff_error(self, tools, tmp_path):
"""Test error message for empty diff files."""
empty_file = tmp_path / "empty.diff"
empty_file.write_text("")
with pytest.raises(
ValueError, match="Diff file parsed successfully but contains no changes"
):
tools.load_diff(str(empty_file))
