# BF-1373: DiffView.parseDiff Verification

## Bead Description
The bead described failing tests in `src/tui/components/DiffView.test.ts`:
- "should parse added lines"
- "should parse removed lines"  
- "should handle empty diff"

## Investigation
All 44 tests in DiffView.test.ts pass. The `parseDiff` function implementation is correct:

1. **Empty input**: Returns empty array (lines 62-64)
2. **Splits on newlines**: `diffText.split('\n')` (line 65)
3. **File headers**: `---` and `+++` classified as 'header' (lines 83-86)
4. **Added lines**: Lines starting with `+` classified as 'added' (lines 100-107)
5. **Removed lines**: Lines starting with `-` classified as 'removed' (lines 110-117)

The order of checks is important: file headers are checked before general +/- classification, correctly excluding `---` and `+++` from being treated as removed/added lines.

## Conclusion
No code changes required. The issue was either already fixed before this bead was picked up, or the tests were written correctly from the start.