@Test
    public void divZeroForOperandTwoShowsError() {
        final String expectedResult = getApplicationContext().getString(R.string.computationError);
        performOperation(R.id.operation_div_btn, "128.0", "0.0", expectedResult);
    }
Use {@link ActivityScenario} to create and launch of the activity.
runner/AndroidTestOrchestratorSample/app/src/androidTest/java/com/example/android/testing/androidtestorchestratorsample/CalculatorInstrumentationTest.java