Class method is not mocking in Jest

Question

I can't find a proper way to mock that line, I keep receiving following error messages:

  console.log
    models             // <---- THIS IS A LINE 173

    TypeError: Database.collection(...).onSnapshot is not a function

      172 |     collections.forEach(collection => {
      173 |       console.log(collection)
    > 174 |       Database.collection(collection).onSnapshot(snapshot => {
          |                                       ^
      175 |         console.log('🔥', snapshot) // <---- I WANT TO MOCK THIS snapshot
      176 |         snapshot.docChanges().forEach(change => {
      177 |           const item = Object.freeze({ id: change.doc.id, ...change.doc.data() })

Here is my test case:

test.only('should react when a new record is created', async () => {
    jest.doMock('@google-cloud/firestore', () => jest.fn(() => ({
      collection: jest.fn()
        .mockReturnThis(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockImplementationOnce(function () { return this })
        .mockResolvedValueOnce(() => { // <---- AT THIS POINT, LINE 174  SHOULD BE MOCKED
          return {
            onSnapshot: jest.fn().mockReturnValue({
              snapshot: []
            })
          }
        }),
      get: jest.fn().mockResolvedValue({ docs: [] }),
      doc: jest.fn().mockReturnThis(),
      set: jest.fn().mockReturnThis(),
      limit: jest.fn().mockReturnThis(),
      onSnapshot: jest.fn().mockReturnThis().mockImplementationOnce(function () { return this }),
      select: jest.fn().mockReturnThis()
    })))

    const StatisticsService = require('./index')
    await StatisticsService()
  })

What should I use, to mock the results of that snapshot ? I tried this also but with no success:

.mockImplementationOnce({ docs: [] })
.mockResolvedValueOnce({ docs: [] })