节点版本 : v12.18.3
帆版 (帆):1.2.3
执行单元测试时,我无法 stub sails helper。我有一个助手来处理与数据库的所有通信。此外,我有一个 API,它使用这个助手。在我的测试中,我试图使用 sinon 来 stub 助手:
API:
fn: async function (inputs, exits) {
// Stuff done here
// I need to stub this helper
let result = await sails.helpers.arangoQuery.with({
requestId: REQUEST_ID,
query: query,
queryParams: params
});
}
我的测试:describe('Get Organization', () => {
it('Server Error - Simulates a failure in fetching the data from ArangoDB', (done) => {
sinon.stub(sails.helpers, 'arangoQuery').returns(null, {status: "success"});
supertest(sails.hooks.http.app)
.get('/organization')
//.expect(200)
.end((error, response) => {
return done()
}
})
})
当我运行测试时,出现以下错误: error: Error: cannot GET /organization (500)
at Response.toError (/opt/designhubz/organization-service/node_modules/superagent/lib/node/response.js:94:15)
at ResponseBase._setStatusProperties (/opt/designhubz/organization-service/node_modules/superagent/lib/response-base.js:123:16)
at new Response (/opt/designhubz/organization-service/node_modules/superagent/lib/node/response.js:41:8)
at Test.Request._emitResponse (/opt/designhubz/organization-service/node_modules/superagent/lib/node/index.js:752:20)
at /opt/designhubz/organization-service/node_modules/superagent/lib/node/index.js:916:38
at IncomingMessage.<anonymous> (/opt/designhubz/organization-service/node_modules/superagent/lib/node/parsers/json.js:19:7)
at IncomingMessage.emit (events.js:327:22)
at endReadableNT (_stream_readable.js:1220:12)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
status: 500,
text: '{}',
method: 'GET',
path: '/organization'
}
根本没有关于此问题的文档。谁能告诉我如何 stub helper ?
最佳答案
风帆助手使用 machine ,这使得 stub 制作更加棘手。
AFAIK ,stubsails helpers 的替代方法是通过stubbing 真正的 fn 函数,因为机器会调用助手的 fn 函数。
更新 : 更改使用 supertest 的示例。
例如:
端点 GET/hello 定义:
// File: HelloController.js
module.exports = {
hello: async function (req, res) {
// Dummy usage of helper with predefined input test.
const output = await sails.helpers.formatWelcomeMessage.with({ name: 'test' });
// Just send the output.
res.send(output);
}
};
并且不要忘记添加路由:'GET /hello': 'HelloController.hello'
在 config/routes.js。测试规范包含 3 种情况(正常调用、 stub 错误和 stub 成功)。
// File: hello.test.js
const sails = require('sails');
const sinon = require('sinon');
const { expect } = require('chai');
const supertest = require('supertest');
describe('Test', function () {
let fwm;
// Copy from example testing lifecycle.
before(function(done) {
sails.lift({
hooks: { grunt: false },
log: { level: 'warn' },
}, function(err) {
if (err) { return done(err); }
// Require helper format welcome message here!
fwm = require('../api/helpers/format-welcome-message');
return done();
});
});
after(function(done) {
sails.lower(done);
});
it('normal case', function (done) {
// Create spy to make sure that real helper fn get called.
const spy = sinon.spy(fwm, 'fn');
supertest(sails.hooks.http.app)
.get('/hello')
.expect(200)
// Expect endpoint output default value.
.expect('Hello, test!')
.end(function() {
// Make sure spy is called.
expect(spy.calledOnce).to.equal(true);
// Restore spy.
spy.restore();
done();
});
});
it('case stub error', function (done) {
// Stub the real fn function inside custom helper.
const stubError = sinon.stub(fwm, 'fn');
stubError.callsFake(async function (input, exits) {
// Setup your error here.
exits.error(new Error('XXX'));
});
supertest(sails.hooks.http.app)
.get('/hello')
.expect(500)
.end(function() {
// Make sure stub get called once.
expect(stubError.calledOnce).to.equal(true);
// Restore stub.
stubError.restore();
done();
});
});
it('case stub success', function (done) {
// Define fake result.
const fakeResult = 'test';
// Stub the real fn function inside custom helper.
const stubSuccess = sinon.stub(fwm, 'fn');
stubSuccess.callsFake(async function (input, exits) {
// Setup your success result here.
exits.success(fakeResult);
});
supertest(sails.hooks.http.app)
.get('/hello')
// Expect endpoint to output fake result.
.expect(fakeResult)
.end(function() {
// Make sure stub get called once.
expect(stubSuccess.calledOnce).to.equal(true);
// Restore stub.
stubSuccess.restore();
done();
});
});
});
当我使用 mocha 运行它时:$ npx mocha test/hello.test.js
Test
✓ normal case
error: Sending 500 ("Server Error") response:
Error: XXX
at Object.<anonymous> ...
✓ case stub error
✓ case stub success
3 passing (407ms)
$
关于unit-testing - Sails.js:无法为单元测试目的 stub 帮助程序,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63779249/