package counters;

import org.junit.*;
import static org.junit.Assert.*;
import counters.SimpleCounter;
import counters.LimitReachedException;

/**
 *
 * Tests for the creation of simple counters and reporting of
 * their limits and initial values by <code>SimpleCounter</code>.
 * <br /><br />
 *
 * <p>
 *  Requires <code>JUnit 4.x</code>.
 * </p>
 *
 * @author Wayne Eberly
 *
 */

public class CreationTest {

 /*
  * First test attempt to create counters with negative limits
  *
  */

    @Test (expected = IllegalArgumentException.class)
    public void TestLargestNegative () {
      SimpleCounter testCounter;
      testCounter = new SimpleCounter(-2147483648);
    }


    @Test (expected = IllegalArgumentException.class)
    public void TestLargeNegative () {
      SimpleCounter testCounter;
      testCounter = new SimpleCounter(-1000);
    }


    @Test (expected = IllegalArgumentException.class)
    public void TestNegativeOne () {
      SimpleCounter testCounter;
      testCounter = new SimpleCounter(-1);
    }


    @Test (expected = IllegalArgumentException.class)
    public void TestZero () {
      SimpleCounter testCounter;
      testCounter = new SimpleCounter(0);
    }

 /*
  *
  * The remaining tests check that counters are created
  * with the required limits when inputs are valid
  *
  */

    private void setAndCheck ( int i ) {
      SimpleCounter testCounter;
      testCounter = new SimpleCounter(i);
      assertEquals(testCounter.getLimit(), i);
      assertEquals(testCounter.getValue(), 0);
    }

    @Test
    public void TestOne () {
      setAndCheck(1);
    }

    @Test
    public void TestTwo () {
      setAndCheck(2);
    }

    @Test
    public void TestLargePositive () {
      setAndCheck(10000);
    }

    @Test
    public void TestLargestPositive () {
      setAndCheck(2147483647);
    }
}