CODEWITHSUNDEEP
javajunit
Jieun Chon
Jieun Chon

Reputation: 139

Test case null time exception

I am having trouble with writing JUnit test for this case. I get runtime error. I tried 

import junit.framework.*;
import student.TestCase;

public class MemmanTest extends TestCase {

public MemmanTest() {
    // empty
}

public void testMemmanSystemIn() throws Exception {

    setSystemIn("10 32 P1sampleInput.txt");
    Memman.main(null);
    assertTrue(systemOut().getHistory(), "P1sampleOutput.txt");
    }
}`

So I can check the input file and the output file is same. (actually when I run the acutal program, its same, but I just cannot make the test case.)

Upvotes: 0

Views: 324

Answers (1)

Kevin Workman
Kevin Workman

Reputation: 42174

That's not how you call main.

If you don't specify any arguments, the args variable is not null; it's an empty array.

Memman.main(new String[]{});

You could also use varargs instead of an array, then just call main with no arguments.

Edit: As Holger pointed out, it looks like you're trying to use setSystemIn() to pass arguments into the main() method. That won't work. Instead, you should just pass them into the array:

Memman.main(new String[]{"10", "32", "P1sampleInput.txt"});

This is the first result for googling "junit pass arguments to main": Passing command line arguments to JUnit in Eclipse

Upvotes: 3

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