test($markdown-containers): cover override case

test/markdown/__snapshots__/containers.spec.js.snap

@@ -14,6 +14,13 @@ exports[`containers tip 1`] = `
 </div>
 `;
 
+exports[`containers tip-override 1`] = `
+<div class="tip custom-block">
+  <p class="custom-block-title">提示</p>
+  <p>I am a tip</p>
+</div>
+`;
+
 exports[`containers v-pre 1`] = `
 <div v-pre>
   <p>I am a v-pre</p>

test/markdown/containers.spec.js

@@ -4,7 +4,7 @@ import containers from '@/markdown/containers.js'
 const mdC = Md().use(containers)
 
 describe('containers', () => {
-  const containerLabels = ['tip', 'warning', 'danger', 'v-pre']
+  const containerLabels = ['tip', 'tip-override', 'warning', 'danger', 'v-pre']
   containerLabels.forEach(label => {
     test(label, async () => {
       const input = await getFragment(`container-${label}`)

test/markdown/fragments/container-tip-override.md

+::: tip 提示
+I am a tip
+:::