MainActivityTest.kt

import androidx.test.espresso.Espresso.onView
import androidx.test.espresso.matcher.ViewMatchers
import androidx.test.rule.ActivityTestRule
import org.junit.Rule
import org.junit.jupiter.api.Assertions.*
import org.junit.rules.TestName

internal class MainActivityTest{

    @get:Rule
    var activityTestRule = ActivityTestRule(MainActivity::class.java)

    // Numeros
    private val btnCero = onView(ViewMatchers.withId((R.id.btnCero)))
    private val btnUno = onView(ViewMatchers.withId((R.id.btnUno)))
    private val btnDos = onView(ViewMatchers.withId((R.id.btnDos)))
    private val btnTres = onView(ViewMatchers.withId((R.id.btnTres)))
    private val btnCuatro = onView(ViewMatchers.withId((R.id.btnCuatro)))
    private val btnCinco = onView(ViewMatchers.withId((R.id.btnCinco)))
    private val btnSeis = onView(ViewMatchers.withId((R.id.btnSeis)))
    private val btnSiete = onView(ViewMatchers.withId((R.id.btnSiete)))
    private val btnOcho = onView(ViewMatchers.withId((R.id.btnOcho)))
    private val btnNueve = onView(ViewMatchers.withId((R.id.btnNueve)))

    // Operadores
    private val btnPunto = onView(ViewMatchers.withId((R.id.btnPunto)))
    private val btnIgual = onView(ViewMatchers.withId((R.id.btnIgual)))
    private val btnResta = onView(ViewMatchers.withId((R.id.btnResta)))
    private val btnSuma = onView(ViewMatchers.withId((R.id.btnSuma)))
    private val btnMultiplicacion = onView(ViewMatchers.withId((R.id.btnMultiplicacion)))
    private val btnDivision = onView(ViewMatchers.withId((R.id.btnDivision)))

    // Utilitarios
    private val btnBorrar = onView(ViewMatchers.withId((R.id.btnBorrar)))
    private val btnLimpiar = onView(ViewMatchers.withId((R.id.btnLimpiar)))

    // Visualizador
    private val tvVisualizadorOperacion = onView(ViewMatchers.withId((R.id.tvVisualizadorOperacion)))
    private val tvVisualizadorResultado = onView(ViewMatchers.withId((R.id.tvVisualizadorResultado)))
    
}