add test

Author: silverwind

web_src/js/utils.js

@@ -87,7 +87,7 @@ export function translateDay(day) {
 }
 
 // convert a Blob to a DataURI
-function blobToDataURI(blob) {
+export function blobToDataURI(blob) {
   return new Promise((resolve, reject) => {
     try {
       const reader = new FileReader();

web_src/js/utils.test.js

@@ -1,7 +1,7 @@
 import {expect, test} from 'vitest';
 import {
   basename, extname, isObject, uniq, stripTags, joinPaths, parseIssueHref,
-  prettyNumber, parseUrl, translateMonth, translateDay
+  prettyNumber, parseUrl, translateMonth, translateDay, blobToDataURI,
 } from './utils.js';
 
 test('basename', () => {
@@ -131,3 +131,8 @@ test('translateDay', () => {
   expect(translateDay(5)).toEqual('pt.');
   document.documentElement.lang = originalLang;
 });
+
+test('blobToDataURI', async () => {
+  const blob = new Blob([JSON.stringify({test: true})], {type: 'application/json'});
+  expect(await blobToDataURI(blob)).toEqual('data:application/json;base64,eyJ0ZXN0Ijp0cnVlfQ==');
+});