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test: assert markdown fallback structure

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This commit is contained in:
Shakker
2026-05-12 18:42:43 +01:00
parent 052724416b
commit 2a95f2cd48
1 changed files with 27 additions and 9 deletions
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36
ui/src/ui/markdown.test.ts
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@@ -4,6 +4,12 @@ import { i18n } from "../i18n/index.ts";
import { md, toSanitizedMarkdownHtml } from "./markdown.ts";
import { renderMarkdownSidebar } from "./views/markdown-sidebar.ts";
function htmlFragment(html: string): HTMLElement {
const container = document.createElement("div");
container.innerHTML = html;
return container;
}
describe("toSanitizedMarkdownHtml", () => {
// ── Original tests from before markdown-it migration ──
it("strips scripts and unsafe links", () => {
@@ -456,13 +462,19 @@ describe("toSanitizedMarkdownHtml", () => {
it("renders deeply nested emphasis markers without dropping text (#36213)", () => {
const nested = "*".repeat(500) + "text" + "*".repeat(500);
const html = toSanitizedMarkdownHtml(nested);
expect(html).toContain("text");
const container = htmlFragment(html);
expect(container.children).toHaveLength(1);
expect(container.firstElementChild?.tagName).toBe("P");
expect(container.textContent).toBe("text\n");
});
it("renders deeply nested brackets without dropping text (#36213)", () => {
const nested = "[".repeat(200) + "link" + "]".repeat(200) + "(" + "x".repeat(200) + ")";
const html = toSanitizedMarkdownHtml(nested);
expect(html).toContain("link");
const container = htmlFragment(html);
expect(container.children).toHaveLength(1);
expect(container.firstElementChild?.tagName).toBe("P");
expect(container.textContent).toBe(`${nested}\n`);
});
it("does not hang on backtick + bracket ReDoS pattern", { timeout: 2_000 }, () => {
@@ -499,18 +511,24 @@ describe("toSanitizedMarkdownHtml", () => {
// MARKDOWN_PARSE_LIMIT is 40_000 chars
const input = Array.from(
{ length: 220 },
(_, i) => `Paragraph ${i + 1}: ${"Long plain-text reply. ".repeat(8)}`,
(_, i) =>
`Paragraph ${i + 1}: ${Array.from({ length: 8 }, () => "Long plain-text reply.").join(
" ",
)}`,
).join("\n\n");
const html = toSanitizedMarkdownHtml(input);
expect(html).toContain('class="markdown-plain-text-fallback"');
const fallback = htmlFragment(html).firstElementChild;
expect(fallback?.tagName).toBe("DIV");
expect(fallback?.className).toBe("markdown-plain-text-fallback");
expect(fallback?.textContent).toBe(input);
});
it("preserves indentation in plain text fallback", () => {
const input = `${"Header line\n".repeat(3400)}\n indented log line\n deeper indent`;
const html = toSanitizedMarkdownHtml(input);
expect(html).toContain('class="markdown-plain-text-fallback"');
expect(html).toContain(" indented log line");
expect(html).toContain(" deeper indent");
const fallback = htmlFragment(html).firstElementChild;
expect(fallback?.className).toBe("markdown-plain-text-fallback");
expect(fallback?.textContent).toBe(input);
});
it("caches oversized fallback results", () => {
@@ -519,7 +537,7 @@ describe("toSanitizedMarkdownHtml", () => {
const first = toSanitizedMarkdownHtml(input);
const second = toSanitizedMarkdownHtml(input);
expect(input.length).toBeGreaterThan(40_000);
expect(first).toContain('class="markdown-plain-text-fallback"');
expect(htmlFragment(first).firstElementChild?.className).toBe("markdown-plain-text-fallback");
expect(second).toBe(first);
});
@@ -530,7 +548,7 @@ describe("toSanitizedMarkdownHtml", () => {
const warnSpy = vi.spyOn(console, "warn").mockImplementation(() => {});
try {
const html = toSanitizedMarkdownHtml("test");
expect(html).toContain('<pre class="code-block">');
expect(html).toBe('<pre class="code-block">test</pre>');
expect(warnSpy).toHaveBeenCalledOnce();
} finally {
renderSpy.mockRestore();