Thread: JUnit AssertEquals

Hey,

I am doing a Junit test case, but I keep having issues with AssertEquals ( object expected, object actual).
I don't know how to reference the other actual object so that it can compare to the expected. Please help, I am stuck

public void add (Distance d) throws CustomException
	{
 
		//I can also convert feet to inches and add all inches together and then divided inches to feet and inches
		Distance result = new Distance();
		int newFeet = this.feet + d.getFeet();
		int newInches = this.inches + d.getInches();
		if(newInches > 11)
		{
			newFeet = newFeet + (newInches/12);
			newInches = newInches % 12;
		}
		result.setFeet(newFeet);
		result.setInches(newInches);
 
		System.out.println("Addition: " + result);
	}

public class DistanceTest 
{
 
	@Test
	public void testAdd() 
	{
//		Distance num = new Distance (5,5);
//		Distance test = new Distance (5,5);
		Distance result = new Distance (10,10);
		assertEquals(result,num.add(test));
		//API uses assertEquals(object expected, object actual)
	}

I'm not sure what you mean by "having issues," so I'll provide general guidance. The use of 'object' may have been a bad choice of words, but we'll look beyond that. The expected item could be as simple as precomputed constant, String, or boolean. For example, you can calculate in advance that 5 + 5 = 10, so to test a method that adds two numbers called myAdd( int x, int y ), you might use assertEquals() like:

assertEquals( 10, myAdd( 5, 5 ) );

Please come back and clarify what help you need if this doesn't clear it up for you.

Originally Posted by GregBrannon

I'm not sure what you mean by "having issues," so I'll provide general guidance. The use of 'object' may have been a bad choice of words, but we'll look beyond that. The expected item could be as simple as precomputed constant, String, or boolean. For example, you can calculate in advance that 5 + 5 = 10, so to test a method that adds two numbers called myAdd( int x, int y ), you might use assertEquals() like:

assertEquals( 10, myAdd( 5, 5 ) );

Please come back and clarify what help you need if this doesn't clear it up for you.

That is my problem, my add method only takes in one parameter not two, would you suggest switching up my add and subtract method to taking it two parameters, so that I can make the assertEquals work?
currently I have

add(Distance d)

should I switch it to

add (distance a, distance b)

I think that would solve the problem?
thanks greg