如何让附加到全局的属性与 sinon 一起正确存根？

Question

I have a helper.js that loads before my tests:

before(async function() {
    this.timeout(30000)
    global.db = require(`${process.cwd()}/models`)()
    ...

Then in my test, I have:

describe.only('Phone Library', () => {
    let updateCallSpy
    beforeEach(() => {
        sinon.stub(twilioClient.calls, 'create').resolves({})
        updateCallSpy = sinon.stub(global.db.models.Call, 'update').resolves(true)
            // sinon.stub(global.db.models.Conversation, 'update').resolves({})
    })

The twilioClient.calls.create stubs properly. But the global.db.models.Call.update does not.

In my actual code, I'm using it like:

        await global.db.models.Call.update({ status: newCallStatus }, { where: { id: foundConversation.Call.id } })

When I console.log(global.db.models.Call) , it simply outputs Call . However, the .update function is there and does what it's supposed to do (a Sequelize model that updates).

I'm sure It's something terribly obvious, so any pointers would be greatly appreciated. Thanks.

Answer 1

The sequelize model methods are defined as prototype by the sequelize core.

The following should work

updateCallSpy = sinon.stub(global.db.models.Call.prototype, 'update').resolves(true)

You can also create a stub instance:

updateCallStubInstance = sinon.createStubInstance(global.db.models.Call)