package lab;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

/**
 * Test case for the lab.Boolean class.
 *
 * @author Franck van Breugel
 */
public class BooleanTest {
    /**
     * Tests the constructor.
     */
    @Test
    public void testConstructor() {
        Assertions.assertNotNull("Constructor returns null", new Boolean(true));
        Assertions.assertNotNull("Constructor returns null", new Boolean(false));
    }

    /**
     * Tests the booleanValue method.
     */
    @Test
    public void testBooleanValue() {
        Assertions.assertEquals("booleanValue fails for true", true, (new Boolean(true)).booleanValue());
        Assertions.assertEquals("booleanValue fails for false", false, (new Boolean(false)).booleanValue());
    }

    /**
     * Test the constant TRUE.
     */
    @Test
    public void testTrue() {
        Assertions.assertNotNull("The constant TRUE is null", Boolean.TRUE);
        Assertions.assertEquals("Value of TRUE is not true", true, Boolean.TRUE.booleanValue());
    }

    /**
     * Tests that the compareTo method throws an exception.
     */
    @Test
    public void testCompareToExceptionTrue() {
	Assertions.assertThrows(IllegalArgumentException.class, () -> {
		Boolean.TRUE.compareTo(null);
	    });
    }

    /**
     * Tests that the compareTo method throws an exception.
     */
    @Test
    public void testCompareToExceptionFalse() {
	Assertions.assertThrows(IllegalArgumentException.class, () -> {
		final Boolean FALSE = new Boolean(false);
		FALSE.compareTo(null);
	    });
    }

    /**
     * Tests the compareTo method.
     */
    @Test
    public void testCompareTo() {
        final Boolean FALSE = new Boolean(false);

        Assertions.assertEquals("Compare false to false", 0, FALSE.compareTo(FALSE));
        Assertions.assertEquals("Compare true to true", 0, Boolean.TRUE.compareTo(Boolean.TRUE));
        Assertions.assertTrue("Compare true to false", Boolean.TRUE.compareTo(FALSE) > 0);
        Assertions.assertTrue("Compare false to true", FALSE.compareTo(Boolean.TRUE) < 0);
    }
}