Improve tests

Author: jhnns

test/index.test.mjs

@@ -4,6 +4,7 @@ import { createRequire } from "module";
 import test from "ava";
 import webpack from "webpack";
 import { Renderer } from "marked";
+import highlighter from "highlight.js";
 
 const __dirname = path.dirname(url.fileURLToPath(import.meta.url));
 const require = createRequire(import.meta.url);
@@ -105,3 +106,15 @@ test("with custom renderer", async (t) => {
 
     t.assert(code.includes("CUSTOM RENDERER") === false);
 });
+
+test("with custom highlighter", async (t) => {
+    const code = await createBundle({
+        fixture: "with-code.md",
+        output: "with-custom-highlighter.cjs",
+        options: {
+            highlight: code => highlighter.highlightAuto(code).value,
+        }
+    });
+
+    t.snapshot(code);
+});

test/snapshots/index.test.mjs.md

@@ -60,12 +60,18 @@ Generated by [AVA](https://avajs.dev).
     </ul>␊
     <h2 id="heading-2">heading 2</h2>␊
     <p><em>italic</em> is the new <strong>bold</strong></p>␊
+    <pre><code class="language-javascript">const i <span class="hljs-operator">=</span> <span class="hljs-number">100</span><span class="hljs-comment">;</span>␊
+    </code></pre>␊
     <table>␊
     <thead>␊
     <tr>␊
     <th>name</th>␊
     <th>type</th>␊
     </tr>␊
     </thead>␊
-    </table>␊
+    <tbody><tr>␊
+    <td>key</td>␊
+    <td><code>string|number</code></td>␊
+    </tr>␊
+    </tbody></table>␊
     `