#428

frontend/src/test/compileMdx.ts

@@ -14,7 +14,7 @@ export const transformMdx = async (source: string, suffix = '.mdx') => {
   const plugin = plugins.find (entry => entry.name === '@mdx-js/rollup')
   if (plugin == null)
     throw new Error ('The application MDX compiler is not registered')
-  return plugin.transform.call (plugin, source, `/test/help-table${suffix}`)
+  return await plugin.transform.call (plugin, source, `/test/help-table${suffix}`) ?? null
 }