Jest firestore 'where' query doesnt work in testing. Snapshot gets all objects, and fails in forEach loop

Im trying to make a test that a function gets all documents from firestore where documents user (id) and the users id match.

This is the function:

export const getUserDocs = async () => {  const user = auth().currentUser;  if (!user) {    return Promise.reject('User is null');  }  const array: Type[] = [];  const snapshot = await firestore().collection('Collection')    .where('user', '==', 'user.id')    .get();  snapshot.forEach((entry) => {    let obj: Type = {      foo: entry.data().foo,      bar: entry.data().bar,      ...    };    array.push(obj);  });  return array;};

In runtime the query and function work like they should. But when I test it, it fails. When I debug the test, it returns all documents (from local test data), disregarding the 'where' query. Then when I loop the snapshot the test fails at the first property, and I get:

TypeError: entry.data is not a function

My test function:

 it('getUserDocs loads users own docs from Firestore', async () => {    const user = currentUser    let requestedDocs = await getUserDocs();    await flushPromises();    expect(requestedDocs).toMatchObject(userDocs);  });

If I test the same function without the where query, the test is successful.

Problem doesnt seem to be in the user either, because if I replace the where query with, for example:

.where('desc', '==', 'some existing desc')

The same error comes up.