MIP-02-Tema-03-GenericStackJUnit-Annotation

package net.forlornly.mip.genericstack;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

/**
 *
 *
 */
public class AppTest {
    private static GenericStack<Integer> gsi;

    @BeforeClass
    public static void beforeClass() {
        gsi = new GenericStack<Integer>();

    }

    @Before
    public void before() {
        gsi.clear();
    }

    @Test
    public void testTop() {
        gsi.push(1);
        gsi.push(2);
        gsi.push(3);

        assertEquals(new Integer(3), gsi.top());
    }

    @Test
    public void testPop() {
        gsi.push(1);
        gsi.push(2);
        gsi.push(3);

        assertEquals(new Integer(3), gsi.pop());
        assertEquals(new Integer(2), gsi.pop());
        assertEquals(new Integer(1), gsi.pop());
    }

    @Test
    public void testIsEmpty() {
        assertTrue(gsi.isEmpty());

        gsi.push(1);
        gsi.push(2);
        gsi.push(3);

        assertFalse(gsi.isEmpty());
    }

    @Test
    public void testClear() {
        assertTrue(gsi.isEmpty());

        gsi.push(1);
        gsi.push(2);
        gsi.push(3);

        gsi.clear();

        assertTrue(gsi.isEmpty());
    }
}