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test(#248 F2): exercise <,> escape branches in raw-HTML export round-trip

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The escaping round-trip test's data (A & "B") only contained & and ",
so the <,> branches of escapeHtmlAttr (&,",<,>) and escapeHtmlText (&,<,>)
were never exercised; a regression dropping <,> escaping would still pass.
Extend the data to A & <B> "C" in both the data-label attribute and the
visible text so both functions' <,> branches are genuinely covered. Assert
the well-formed escaped tag (attr: A &amp; &lt;B&gt; &quot;C&quot;, text:
A &amp; &lt;B&gt; "C"), explicitly reject the raw tag-corrupting forms,
and confirm markdownToHtml restores the originals. Comment updated to match.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
claude code agent 227
2026-06-29 00:04:56 +03:00
parent 5308f2fb65
commit 04fda0c0b2
1 changed files with 20 additions and 14 deletions
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34
packages/editor-ext/src/lib/markdown/utils/turndown.dataloss.test.ts
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@@ -111,22 +111,28 @@ describe("htmlToMarkdown — custom nodes are preserved losslessly (#206 mdrt-2)
// HTML special chars in an attribute value or in a node's text must be
// ESCAPED when re-emitted as raw HTML, otherwise the exported tag is
// malformed and `markdownToHtml`'s parser cannot restore the original value
// (the same silent data loss this PR fixes). This exercises the escape
// branches of escapeHtmlAttr (&, ", <, >) and escapeHtmlText (&, <, >) that
// the alphanumeric-only cases above never hit. The mention's data-label and
// visible text both carry `&` and `"`.
it("escapes HTML special chars in attrs + text and round-trips them", async () => {
// (the same silent data loss this PR fixes). Dropping `<`/`>` escaping is the
// dangerous regression: a stray `<` or `>` corrupts the tag (or injects new
// markup), so the test data carries ALL of `&`, `"`, `<`, `>` in BOTH the
// data-label attribute and the visible text. That fully exercises
// escapeHtmlAttr's `&,",<,>` branches and escapeHtmlText's `&,<,>` branches
// (escapeHtmlText leaves `"` literal); the alphanumeric-only cases above hit
// none of them.
it("escapes HTML special chars (& \" < >) in attrs + text and round-trips them", async () => {
const md = htmlToMarkdown(
`<p>hi <span data-type="mention" data-id="u1" data-label='A & "B"'>@A &amp; "B"</span> there</p>`,
`<p>hi <span data-type="mention" data-id="u1" data-label="A &amp; &lt;B&gt; &quot;C&quot;">@A &amp; &lt;B&gt; "C"</span> there</p>`,
);
// (a) The exported Markdown carries a WELL-FORMED, correctly-escaped tag:
// the attribute escapes both `&` and `"`; the text escapes `&` (a `"`
// inside text content is legal, so it stays literal).
expect(md).toContain('data-label="A &amp; &quot;B&quot;"');
expect(md).toContain('>@A &amp; "B"</span>');
// And NOT the raw, malformed form that would break the attribute.
expect(md).not.toContain('data-label="A & "B""');
// the attribute escapes `&`, `<`, `>` AND `"`; the text escapes `&`, `<`,
// `>` (a `"` inside text content is legal, so it stays literal).
expect(md).toContain('data-label="A &amp; &lt;B&gt; &quot;C&quot;"');
expect(md).toContain('>@A &amp; &lt;B&gt; "C"</span>');
// And explicitly NOT the raw, tag-corrupting forms: a literal `<B>` (would
// mean `<`/`>` escaping was dropped in either the attr or the text)...
expect(md).not.toContain("<B>");
// ...nor the malformed attribute that an unescaped `"` would produce.
expect(md).not.toContain('data-label="A &amp; &lt;B&gt; "C""');
// (b) Import restores the ORIGINAL (unescaped) values, attribute and text.
const html = await markdownToHtml(md);
@@ -134,8 +140,8 @@ describe("htmlToMarkdown — custom nodes are preserved losslessly (#206 mdrt-2)
const span = dom.querySelector('span[data-type="mention"]');
expect(span).not.toBeNull();
expect(span!.getAttribute("data-id")).toBe("u1");
expect(span!.getAttribute("data-label")).toBe('A & "B"');
expect(span!.textContent).toBe('@A & "B"');
expect(span!.getAttribute("data-label")).toBe('A & <B> "C"');
expect(span!.textContent).toBe('@A & <B> "C"');
});
});
});