库在节点js中进行jasmine测试时抛出一个未捕获的错误。

Question

我有以下功能：

var fs = require('fs');


function Writer(path, content) {
    this.path = path;
    this.content = content;

    this.process = function () {

    fs.writeFile(
        this.path,
        this.content,
        function (error) {
            if (error) {
                throw new Error('Something went wrong during writing');
            }
    }, 'utf-8')

};
}
module.exports = Writer;

使用this测试：

it('test if writing fails ', function () {
    var writer = new Writer(
        '/data/configurations/ab/ba/abba/test.json',
        'content'
    );

    expect(function() {
        writer.process()
    }).toThrowError("Something went wrong during writing");
})

因此，这预计会失败，因为没有要写入的文件。则库FS抛出一个未被捕获的错误。

以下是测试的输出：

Started
.....F

Failures:
1) writer test test if writing fails 
  Message:
    Expected function to throw an Error.
  Stack:
    Error: Expected function to throw an Error.
        at Object.<anonymous> (/vagrant/project/tests/utils/file/writerTest.js:42:6)

6 specs, 1 failure
Finished in 0.198 seconds


/vagrant/project/node_modules/mock-fs/lib/binding.js:1060
      throw new FSError('ENOENT', filepath);
Error: ENOENT, no such file or directory '/vagrant/project/node_modules/jasmine/node_modules/exit'
    at Binding.<anonymous> (/vagrant/project/node_modules/mock-fs/lib/binding.js:1060:13)

所以这个库抛出了错误，而toThrowError没有得到它。有没有人知道如何解决这个问题，或者我的错误是什么？

Answer 1

当抛出ENOENT时，意味着文件或目录丢失。你可能缺少'exit‘包，所以你应该安装它-

https://www.npmjs.com/package/exit

运行npm install exit，它应该可以解决这个问题。