Basic jUnit Test Case

QueryBoard.java

/**
 * Sample class file for above unit tests
 */
public class QueryBoard {
    int[] nums;
    
    QueryBoard() {
      nums = new int[10];
    }
    
    public void setNums(int min, int max, int step) {
      for (int i = min; ( i < nums.length() && ( i <= max ) ); i++) {
        nums[i] = i;
      }
    }
    
    public int queryNums(int min, int max) {
      int result = 0;
      for (int i = min; ( i < nums.length() && ( i <= max ) ); i++) {
        result += i;
      }
      
      return result;
    }
}

QueryBoardTest.java

import java.util.*;
import org.junit.Test;
import static org.junit.Assert.*;

/**
 * Unit test suite
 */
public class QueryBoardTest {
    
    /**
     * Test case 1
     */ 
    @Test
    public void testRows() {
      QueryBoard board = new QueryBoard();
      
      for(int i = 0; i < QueryBoard.SIZE; i++) {
        board.setNums(0, i, 10);
        assertEquals(board.queryNums(0, i), 2560);
      }      
    }
}