use ai::agent::action::CommentSide; use super::{DiffHunkParseError, parse_diff_hunk}; #[test]fn test_parse_preserves_whitespace() {    let diff_hunk = "@@ -1,2 +1,3 @@ first line+    indented line last line";     // Diff line index 2 is the added line with indentation    let result = parse_diff_hunk(diff_hunk, 2, None);    assert!(result.is_ok());    let (_, content) = result.unwrap();    assert_eq!(content.content, "+    indented line");} #[test]fn test_parse_empty_hunk() {    let result = parse_diff_hunk("", 1, None);    assert!(matches!(result, Err(DiffHunkParseError::EmptyHunk)));} #[test]fn test_parse_malformed_header() {    // Header doesn't have valid format    let diff_hunk = "@@ invalid @@";    let result = parse_diff_hunk(diff_hunk, 1, None);    assert!(matches!(result, Err(DiffHunkParseError::InvalidHeader(_))));} #[test]fn test_parse_missing_header() {    // Content without a valid header line    let diff_hunk = " line1\n+line2\n line3";    let result = parse_diff_hunk(diff_hunk, 1, None);    assert!(matches!(result, Err(DiffHunkParseError::InvalidHeader(_))));} #[test]fn test_parse_hunk_with_two_headers() {    // Diff with an unexpected second header line    let diff_hunk = "@@ -1,3 +1,4 @@\n line1\n@@ -5,2 +5,2 @@\n line2";    let result = parse_diff_hunk(diff_hunk, 2, None);    assert!(matches!(        result,        Err(DiffHunkParseError::UnexpectedHunkHeader { line_index: 2 })    ));} // ---------------------------------------------------------------------------// Regression: markdown list items in diff hunks (PR #23626)// --------------------------------------------------------------------------- /// Regression test for diff hunks from PR #23626 where the commented line is a/// markdown list item (`+- ...`). The leading `-` is part of the content, not a/// diff deletion marker.#[test]fn test_parse_markdown_list_item_in_pure_addition_hunk() {    // Trimmed hunk shape from PR #23626 comment 2997753460    let diff_hunk = "@@ -0,0 +16,1 @@\n+- `specs/<issue-number>/TECH.md`";     let result = parse_diff_hunk(diff_hunk, 16, Some(CommentSide::Right));    assert!(result.is_ok());    let (_, content) = result.unwrap();    assert_eq!(content.content, "+- `specs/<issue-number>/TECH.md`");    assert_eq!(content.original_text(), "- `specs/<issue-number>/TECH.md`");} /// Same scenario but with more surrounding context, matching the full diff hunk/// shape from the GitHub API for PR #23626.#[test]fn test_parse_markdown_list_item_in_full_addition_hunk() {    let diff_hunk = "@@ -0,0 +1,116 @@\n\+---\n\+name: write-tech-spec\n\+description: desc\n\+---\n\+\n\+# write-tech-spec\n\+\n\+Write a spec.\n\+\n\+## Overview\n\+\n\+The tech spec overview.\n\+\n\+Write specs into source control under:\n\+\n\+- `specs/<issue-number>/TECH.md`";     let result = parse_diff_hunk(diff_hunk, 16, Some(CommentSide::Right));    assert!(result.is_ok());    let (_, content) = result.unwrap();    assert_eq!(content.content, "+- `specs/<issue-number>/TECH.md`");    assert_eq!(content.original_text(), "- `specs/<issue-number>/TECH.md`");} /// Diff line whose content starts with `+` after the diff `+` prefix.#[test]fn test_parse_addition_with_leading_plus_in_content() {    let diff_hunk = "@@ -0,0 +1,1 @@\n++positive value";     let result = parse_diff_hunk(diff_hunk, 1, Some(CommentSide::Right));    assert!(result.is_ok());    let (_, content) = result.unwrap();    assert_eq!(content.content, "++positive value");    assert_eq!(content.original_text(), "+positive value");} /// Diff line whose content starts with `-` after the diff `-` prefix (deletion/// of a markdown list item).#[test]fn test_parse_deletion_with_leading_dash_in_content() {    let diff_hunk = "@@ -1,1 +1,0 @@\n-- list item";     let result = parse_diff_hunk(diff_hunk, 1, Some(CommentSide::Left));    assert!(result.is_ok());    let (_, content) = result.unwrap();    assert_eq!(content.content, "-- list item");    assert_eq!(content.original_text(), "- list item");} /// Context line with content that starts with `-`.#[test]fn test_parse_context_line_starting_with_dash() {    let diff_hunk = "@@ -1,3 +1,4 @@\n - list item\n+added\n second\n third";     let result = parse_diff_hunk(diff_hunk, 1, Some(CommentSide::Right));    assert!(result.is_ok());    let (_, content) = result.unwrap();    assert_eq!(content.content, " - list item");} /// Context line with content that starts with `@`.#[test]fn test_parse_context_line_starting_with_at_sign() {    let diff_hunk = "@@ -1,2 +1,3 @@\n @decorator\n+added\n next";     let result = parse_diff_hunk(diff_hunk, 1, Some(CommentSide::Right));    assert!(result.is_ok());    let (_, content) = result.unwrap();    assert_eq!(content.content, " @decorator");}