Throw error when corePath is not a string

Author: jeromewu

src/browser/getCreateFFmpegCore.js

@@ -2,6 +2,9 @@ const resolveURL = require('resolve-url');
 const { log } = require('../utils/log');
 
 module.exports = async ({ corePath: _corePath }) => {
+  if (typeof _corePath !== 'string') {
+    throw Error('corePath should be a string!');
+  }
   if (typeof window.createFFmpegCore === 'undefined') {
     log('info', 'fetch ffmpeg-core.worker.js script');
     const corePath = resolveURL(_corePath);

tests/ffmpeg.test.js

@@ -1,6 +1,15 @@
 const { createFFmpeg } = FFmpeg;
 
 describe('load()', () => {
+  it('should throw error when corePath is not a string', async () => {
+    const ffmpeg = createFFmpeg({ ...OPTIONS, corePath: null });
+
+    try {
+      await ffmpeg.load();
+    } catch (e) {
+      expect(e).to.be.an('Error');
+    }
+  });
   it('should throw error when not called before FS() and run()', () => {
     const ffmpeg = createFFmpeg(OPTIONS);
     expect(() => ffmpeg.FS('readdir', 'dummy')).to.throw();