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I'm trying to test a null return in some code: public Time getStartTime()    { if...

I'm trying to test a null return in some code:

public Time getStartTime()   
{
if (this.startTime == null)   
{
return null;
}   
return new Time(this.startTime);

When I test it, I'm trying to use:

Runner runnerTest3 = new Runner();
RunnerResult runnerResultTest3 = new RunnerResult("RD1234", runnerTest3);
  
Time timeTest3 = new Time();
runnerResultTest3.setEndTime(timeTest3);
  
assertNull(timeTest3);
  
assertNull(null, runnerResultTest3.getEndTime().getHrs());
assertNull(null, runnerResultTest3.getEndTime().getMins());
assertNull(null, runnerResultTest3.getEndTime().getSecs());

It will not compile and will throw errors. I'm not sure what I'm missing

engineering   Computer-Science   
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Homework Answers

Answer #1

Your error is in these statements.

assertNull(null, runnerResultTest3.getEndTime().getHrs());
assertNull(null, runnerResultTest3.getEndTime().getMins());
assertNull(null, runnerResultTest3.getEndTime().getSecs());

assertNull takes only one parameter, determines if it is null or not, but you have provided two. I think you tried to use the syntax of assertEquals. So there are two options to correct this.

1) Use this

assertNull(runnerResultTest3.getEndTime().getHrs());
assertNull (runnerResultTest3.getEndTime().getMins());
assertNull (runnerResultTest3.getEndTime().getSecs());

or

2) Use this instead of assertNull

assertEquals(runnerResultTest3.getEndTime().getHrs(),null);
assertEquals(runnerResultTest3.getEndTime().getMins(),null);
assertEquals(runnerResultTest3.getEndTime().getSecs(),null);

Let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

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