test_stack.java

import static org.junit.Assert.*;

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

public class test_stack{
	
	private Stack ste;
	
	@Before
	public void setUp(){
		ste = new Stack();
		Element e1 = new Element(1);
		Element e2 = new Element(13);
		Element e3 = new Element(31);
		ste.add(e1);
		ste.add(e2);
		ste.add(e3);	
	}
	
	private Stack instanceStack() {
		Stack  st = new Stack();
		return st;
	}
	
	@Test
	public void test_stack_empty(){
	 Stack st = instanceStack();
	 st.empty();
	 assertTrue(st.empty() == true);
	}
	
	@Test
	public void test_add(){
		Stack st = instanceStack();
		Element e = new Element(10);
		st.add(e);
	}
	
	@Test
	public void test_get_top(){
		Stack st = instanceStack();
		Element e = new Element(10);
		st.add(e);
		assertTrue(st.getTopValue() == 10);
	}
	@Test
	public void test_should_initialize_stack_empty(){
		Stack st = instanceStack();
		assertTrue(st.getTopValue() == null);
	}
	
	@Test
	public void test_add_two_elements_at_stack(){
		Stack st = instanceStack();
		Element e1 = new Element(1);
		Element e2 = new Element(54);
		st.add(e1);
		st.add(e2);
	    assertTrue(st.getTopValue() == 54);
	}
	
	@Test
	public void test_should_return_second_element_at_stack(){
		Element first = ste.getTop();
		Element second = first.getAntElement();
		assertTrue(second.getElementValue() == 13);
		
	}
	
	@Test
	public void test_remove_element_at_top(){
		Stack st = instanceStack();
		Element e1 = new Element(1);
		st.add(e1);
		st.remove();
		Element e2 = new Element(1);
		st.add(e2);
		assertTrue(st.empty() == false);
		
	}
	
	@Test
	public void test_remove_elements(){
		ste.remove();
		assertTrue(ste.empty() == false);
		ste.remove();
		assertTrue(ste.empty() == false);
		ste.remove();
		assertTrue(ste.empty() == true);
	}
	
	@Test
	public void test_query_element_with_stack_empty(){
		Stack st = instanceStack();
		assertEquals("Pilha Vazia", st.search(14));
	}

	
	@Test
	public void test_query_element(){
		assertEquals("Achou -> 13", ste.search(13));
	}
	
	@Test
	public void test_lenght_stack(){
		ste.remove();
		assertTrue(ste.tamanho() == 2);
	}
	

}