Function test_save_merge_into_existing_section

atomic-agent/src/learnings.rs:1046–1077

()

    #[test]
    fn test_save_merge_into_existing_section() {
        let dir = TempDir::new().unwrap();
        let claude_md = dir.path().join("CLAUDE.md");

        // Write file with existing learnings section
        let existing = format!(
            "# Project\n\n{}\n\n{}\n\n{}\n\n### Repo\n- Existing learning\n\n{}\n",
            SECTION_HEADING, SECTION_NOTE, SECTION_START, SECTION_END
        );
        std::fs::write(&claude_md, &existing).unwrap();

        let learnings = Learnings {
            repo: vec!["New learning".into()],
            code: vec![],
            workflow: vec![],
        };

        let result = save_learnings_to_context_file(dir.path(), "claude-code", &learnings).unwrap();

        assert_eq!(result.added, 1);

        let content = std::fs::read_to_string(&claude_md).unwrap();
        assert!(content.contains("- Existing learning"));
        assert!(content.contains("- New learning"));
        // Should have only ONE ### Repo heading, not two
        assert_eq!(
            content.matches("### Repo").count(),
            1,
            "### Repo should appear exactly once, got:\n{}",
            content
        );
    }

    #[test]
    fn test_save_dedup() {