@Test
    public void typeOperandsAndPerformAddOperation() {
        performOperation(R.id.operation_add_btn, "16.0", "16.0", "32.0");
    }
Use {@link ActivityScenario} to create and launch of the activity.
runner/AndroidTestOrchestratorSample/app/src/androidTest/java/com/example/android/testing/androidtestorchestratorsample/CalculatorInstrumentationTest.java