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import org.junit.Test;

import java.util.EmptyStackException;

import static org.junit.Assert.assertEquals;

/**

* Тестирование стека

*/

public class StackTest {

/**

* Стек с целыми числами

*/

@Test

public void testIntStack() {

Stack<Integer> stack = new Stack<Integer>();

stack.push(1);

stack.push(2);

stack.push(3);

assertEquals(3, stack.pop().intValue());

assertEquals(2, stack.pop().intValue());

assertEquals(1, stack.pop().intValue());

}

/**

* Стек со строками

*/

@Test

public void testStringStack() {

Stack<String> stack = new Stack<String>();

stack.push("Hello");

stack.push("world");

assertEquals("world", stack.pop());

assertEquals("Hello", stack.pop());

}

/**

* Стек пуст и мы пытаемся из него вытащить значение

*/

@Test(expected = EmptyStackException.class)

public void testEmptyStack() {

class MyClass {

}

Stack<MyClass> stack = new Stack<MyClass>();

stack.pop();

}

}