NullPointerException while testing app

Question

I've got a problem while testing my app, class "DateToday" exactly, here's part of that class:

public DateToday(){
    monthName();
    dayName();
    dayNumber();
    yearNumber();
}

public int yearNumber(){
    year = c.get(Calendar.YEAR);
    return year;
}

And here's my test class:

@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk = 21)
public class DateTodayTest {

private DateToday mDateToday;

@Test
public void checkYear() {
    assertEquals(mDateToday.yearNumber(), 2016);
}

Why I am still having NullPointerException at checkYear() method and the test is failed? It may be a stupid issue but I am blind with that...

You must initialize `mDateToday` – Radouane ROUFID Jul 11 '16 at 10:08 — Radouane ROUFID, Jul 11 '16 at 10:08

score 1 · Accepted Answer · answered Jul 11 '16 at 10:07

1

It seems mDateToday is not initialized, you should use the constructor:

private DateToday mDateToday =  new DateToday ();

answered Jul 11 '16 at 10:07

SCouto

7,808
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Thanks a lot, that was it! – Tymek T. Jul 11 '16 at 10:08

score 0 · Answer 2 · edited Jul 11 '16 at 11:10

0

You need to create new instance of DateToday class before calling assertEquals() method like: mDateToday = new DateToday();

edited Jul 11 '16 at 11:10

Vladimir Vagaytsev

2,871
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answered Jul 11 '16 at 10:10

Artiom Ovechko

1
1

NullPointerException while testing app

2 Answers2