Fix plaintext markdown converter

server/tests/helpers/markdown.ts

@@ -0,0 +1,34 @@
+/* eslint-disable @typescript-eslint/no-unused-expressions,@typescript-eslint/require-await */
+
+import 'mocha'
+import { mdToOneLinePlainText } from '@server/helpers/markdown'
+import { expect } from 'chai'
+
+describe('Markdown helpers', function () {
+
+  describe('Plain text', function () {
+
+    it('Should convert a list to plain text', function () {
+      const result = mdToOneLinePlainText(`* list 1
+* list 2
+* list 3`)
+
+      expect(result).to.equal('list 1, list 2, list 3')
+    })
+
+    it('Should convert a list with indentation to plain text', function () {
+      const result = mdToOneLinePlainText(`Hello:
+  * list 1
+  * list 2
+  * list 3`)
+
+      expect(result).to.equal('Hello: list 1, list 2, list 3')
+    })
+
+    it('Should convert HTML to plain text', function () {
+      const result = mdToOneLinePlainText(`**Hello** <strong>coucou</strong>`)
+
+      expect(result).to.equal('Hello coucou')
+    })
+  })
+})