@Before
public void init() {
device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());
device.pressHome();
device.wait(Until.hasObject(By.desc("Apps")), 3000);
UiObject2 appsButton = device.findObject(By.desc("Apps"));
appsButton.click();
device.wait(Until.hasObject(By.text("Calculator")), 3000);
UiObject2 calculatorApp = device.findObject(By.text("Calculator"));
calculatorApp.click();
}
@Test
public void launchCalculatorAndTest() {
device.wait(Until.hasObject(By.text("9")), 3000);
UiObject2 buttonNine = device.findObject(By.text("9"));
buttonNine.click();
UiObject2 buttonPlus = device.findObject(By.desc("plus"));
buttonPlus.click();
buttonNine.click();
UiObject2 buttonEquals = device.findObject(By.desc("equals"));
buttonEquals.click();
device.waitForIdle(3000);
UiObject2 resultText = device.findObject(By.clazz("android.widget.EditText"));
String result = resultText.getText();
assertTrue(result.equals("18"));
}