使用axios进行http调用时,如何在承诺拒绝的catch块中使测试失败? 断言,如果catch块中的表达式无济于事,则添加期望。 测试通过了。
我正在使用 .\node_modules\.bin\mocha
let chai = require('chai');
var expect = chai.expect;
var axios = require('axios')
var instance = axios.create({})
describe('test', () => {
context('test', () => {
it('should succeed', () => {
let url = 'url'
instance.get(url)
.then(function(response) {
expect(response.data).not.to.be.null
} )
.catch(function(err) {
console.error(err.data)
// should fail the test
})
})
})
})
答案 0 :(得分:1)
如果您想验证我的建议,请用有效的网址(例如:https://google.com)替换网址值
您可以尝试几种方法:
1)使用assert.fail()
const axios = require('axios');
const { assert, expect } = require('chai');
const instance = axios.create({})
describe('test', () => {
context('test', () => {
it('should succeed', () => {
let url = 'abc'
return instance.get(url)
.then((res) => {
expect(res.data).not.to.be.null;
})
.catch((err) => {
assert.fail('expected', 'actual', err);
});
});
});
});
2)将done()与错误对象一起使用
const axios = require('axios');
const { expect } = require('chai');
const instance = axios.create({})
describe('test', () => {
context('test', () => {
it('should succeed', (done) => {
let url = 'abc'
instance.get(url)
.then((res) => {
expect(res.data).not.to.be.null;
done();
})
.catch((err) => {
done(err);
});
});
});
});
3)只需抛出一个错误:)
const axios = require('axios');
const { expect } = require('chai');
const instance = axios.create({})
describe('test', () => {
context('test', () => {
it('should succeed', () => {
let url = 'abc'
return instance.get(url)
.then((res) => {
expect(res.data).not.to.be.null;
})
.catch((err) => {
throw err;
});
});
});
})
如果您想检查该方法是否完全失败并且您希望这样做,请按照这种方式进行操作(它需要chai-as-promised软件包):
const axios = require('axios');
const chai = require('chai');
chai.use(require('chai-as-promised'));
const instance = axios.create({})
describe('test', () => {
context('test', () => {
it('should succeed', () => {
let url = 'abc'
return chai.expect(instance.get(url)).to.be.rejected;
});
});
});