[英]How can I stub an internal function in my route with sinon
我有我的內部 function
//in greatRoute.ts
async function _secretString(param: string): Promise<string> {
...
}
router
.route('/foo/bar/:secret')
.get(
async (...) => {
...
const secret = _secretString(res.params.secret);
...
},
);
export default {
...
_secretString
};
現在我正在嘗試使用sinon.stub
來模擬調用,如下所示:
sinon.stub(greatRoute, '_secretString').resolves('abc');
但這並不像我想要的那樣工作。 當我在測試中調用路由時,它仍然進入_secretString
function。 我在這里錯過了什么嗎? I already tried to put the export in front of the function header like this: export async function _secretString(param: string): Promise<string>
instead of doing the export default {...}
but that didn't help.
您可以使用將 package重新連接到存根_secretString
function。 例如
index.ts
:
async function _secretString(param: string): Promise<string> {
return 'real secret';
}
async function route(req, res) {
const secret = await _secretString(req.params.secret);
console.log(secret);
}
export default {
_secretString,
route,
};
index.test.ts
:
import sinon from 'sinon';
import rewire from 'rewire';
describe('61274112', () => {
it('should pass', async () => {
const greatRoute = rewire('./');
const secretStringStub = sinon.stub().resolves('fake secret');
greatRoute.__set__('_secretString', secretStringStub);
const logSpy = sinon.spy(console, 'log');
const mReq = { params: { secret: '123' } };
const mRes = {};
await greatRoute.default.route(mReq, mRes);
sinon.assert.calledWithExactly(logSpy, 'fake secret');
sinon.assert.calledWith(secretStringStub, '123');
});
});
帶有覆蓋率報告的單元測試結果:
fake secret
✓ should pass (1383ms)
1 passing (1s)
----------|---------|----------|---------|---------|-------------------
File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
----------|---------|----------|---------|---------|-------------------
All files | 75 | 100 | 50 | 75 |
index.ts | 75 | 100 | 50 | 75 | 2
----------|---------|----------|---------|---------|-------------------
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