MertNYuksel

class TestObserver<T> : Observer<T> {
    private val values = mutableListOf<T>()

    fun getValues(): List<T> = values

    override fun onChanged(value: T) {
        values.add(value)
    }
}

MertNYuksel

package com.x.y.authentication

import android.os.Bundle
import android.view.View
import androidx.fragment.app.viewModels
import com.x.y.R
import com.x.y.common.BaseFragment
import com.x.y.common.extensions.observeNonNull
import com.x.y.common.viewBinding
import com.x.y.databinding.FragmentAuthenticationBinding