Adds simple test for translation files

test/translations.js

@@ -0,0 +1,24 @@
+import { readFileSync, readdirSync } from 'fs'
+import { join } from 'path'
+import { expect } from 'vitest'
+
+const jsonDirectory = join(__dirname, '../app/locales')
+
+function getJsonFiles (dir) {
+  return readdirSync(dir).filter(file => file.endsWith('.json'))
+}
+
+describe('Translations files', () => {
+  const jsonFiles = getJsonFiles(jsonDirectory)
+
+  jsonFiles.forEach(file => {
+    it(`${file} is valid`, () => {
+      const filePath = join(jsonDirectory, file)
+      const data = readFileSync(filePath, 'utf8')
+
+      expect(() => {
+        JSON.parse(data)
+      }).not.toThrow()
+    })
+  })
+})