DocumentReference do not match with query

[starhoshi]

I can not get data with a query using DocumentReference.

This code, I can get data with a real Firestore, but can not get it using firebase-mock.

mockFirestore.autoFlush()
const user = await mockFirestore.collection('user').add()
const friend = await mockFirestore.collection('friend').add({user: user})

const fetched = await firestore.collection('friend')
    .where('user', '==', user) // Reference Query
    .get()

console.log(fetched.docs.length) // => 0

[ollietreend]

I'd like to add my support to this. It makes unit tests needlessly complex when firebase-mock doesn't support this type of query.