bekoedit-markdown 0.12.0

Markdown parser index, block identity, raw islands, source patch engine, and form-edit resolution for bekoedit.
Documentation 
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//! RFC-012 acceptance criteria: preview renders from canonical text and
//! raw HTML is displayed according to the safety policy (never executed).

use crate::preview::render_preview_html;

#[test]
fn renders_basic_markdown() {
    let html = render_preview_html("# Title\n\nSome *emphasis*.\n");
    assert!(html.contains("<h1>Title</h1>"));
    assert!(html.contains("<em>emphasis</em>"));
}

#[test]
fn script_blocks_are_escaped_not_executed() {
    let html = render_preview_html("<script>alert('x')</script>\n");
    assert!(
        !html.contains("<script>"),
        "script tag must not survive: {html}"
    );
    assert!(
        html.contains("&lt;script&gt;"),
        "script must be shown escaped: {html}"
    );
}

#[test]
fn inline_html_is_escaped() {
    let html = render_preview_html("text with <b onclick=\"evil()\">bold</b> inline\n");
    assert!(!html.contains("<b onclick"));
    assert!(html.contains("&lt;b onclick"));
}

#[test]
fn front_matter_is_not_rendered_as_content() {
    let html = render_preview_html("---\ntitle: hidden\n---\n\n# Visible\n");
    assert!(!html.contains("hidden"));
    assert!(html.contains("<h1>Visible</h1>"));
}

#[test]
fn task_lists_render_as_checkboxes() {
    let html = render_preview_html("- [x] done\n- [ ] todo\n");
    assert!(html.contains("checkbox"));
}

// --- RFC-038: extension rendering ---

#[test]
fn math_inline_is_shown_as_code_not_executed() {
    let html = render_preview_html("The formula $E = mc^2$ is famous.\n");
    assert!(
        html.contains("class=\"math-inline\""),
        "math-inline class missing"
    );
    assert!(html.contains("E = mc^2"), "math source not present");
    // Must not contain raw $ markers in a way that looks unprocessed.
    assert!(
        !html.contains("$E = mc^2$"),
        "raw math dollars should be rendered"
    );
}

#[test]
fn math_block_is_shown_as_preformatted_code() {
    let html = render_preview_html("$$\nE = mc^2\n$$\n");
    assert!(html.contains("math-block"), "math-block class missing");
    assert!(html.contains("E = mc^2"));
}

#[test]
fn strikethrough_renders_in_preview() {
    let html = render_preview_html("~~deleted text~~\n");
    assert!(
        html.contains("<del>"),
        "strikethrough should render as <del>"
    );
}

#[test]
fn footnote_definition_is_classified_as_island() {
    use crate::island::RawIslandType;
    let doc = "See note[^1].\n\n[^1]: The footnote text.\n";
    let idx = crate::index::MarkdownIndex::build(doc, 1);
    assert!(
        idx.raw_islands
            .iter()
            .any(|i| i.island_type == RawIslandType::Footnote),
        "footnote definition should become a Footnote island"
    );
}