import { test } from "node:test";

import assert from "node:assert/strict";

import { renderMarkdown } from "../ui";

function stripAnsi(text: string): string {

// eslint-disable-next-line no-control-regex

return text.replace(/\[[0-9;]*m/g, "");

}

test("renderMarkdown returns empty string for empty input", () => {

assert.equal(renderMarkdown(""), "");

});

test("renderMarkdown preserves heading text", () => {

const result = stripAnsi(renderMarkdown("# Title"));

assert.equal(result.includes("Title"), true);

assert.equal(result.includes("#"), true);

});

test("renderMarkdown preserves code fences with language tag", () => {

const result = stripAnsi(renderMarkdown("```js\nconsole.log(1);\n```"));

assert.equal(result.includes("[js]"), true);

assert.equal(result.includes("console.log(1);"), true);

});

test("renderMarkdown styles inline code without removing it", () => {

const result = stripAnsi(renderMarkdown("Use `npm install` first."));

assert.equal(result.includes("npm install"), true);

});

test("renderMarkdown keeps bullet markers", () => {

const result = stripAnsi(renderMarkdown("- item one\n- item two"));

assert.equal(result.includes("- item one"), true);

assert.equal(result.includes("- item two"), true);

});

test("renderMarkdown handles plain text unchanged in stripped form", () => {

const text = "hello world\nthis is a sentence";

const result = stripAnsi(renderMarkdown(text));

assert.equal(result, text);

});