@Test
public void testBuildDistrictwiseAlert() {

    List<DistrictwiseData> deltas = asList(
            new DistrictwiseData("Maharashtra", "Mumbai", "120", "90", "5", "9", "12", "3", "1", "")
    );
    List<DistrictwiseData> dailies = asList(
            new DistrictwiseData("Maharashtra", "Mumbai", "25", "40", "12", "3", "11", "23", "4", "")
    );
    AtomicReference<String> alertText = new AtomicReference<>();

    String expected = "12 new cases, 1 death, 3 recoveries in Mumbai\n";
    String actual = buildDistrictwiseAlert(deltas, dailies);

    assertEquals(expected, actual);
}