package com.ralf.stack;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class StackUtilsTest {
@Before
public void setUp() throws Exception {
}
@Test
public void testReverse() {
MyStack<Integer> stack = new MyStack<>();
stack.push(1);
stack.push(2);
stack.push(3);
stack.push(4);
stack.push(5);
Assert.assertEquals(5, stack.size());
StackUtil.reverse(stack);
Assert.assertEquals(5, stack.size());
Assert.assertEquals(1, stack.pop().intValue());
Assert.assertEquals(2, stack.pop().intValue());
Assert.assertEquals(3, stack.pop().intValue());
Assert.assertEquals(4, stack.pop().intValue());
Assert.assertEquals(5, stack.pop().intValue());
}
@Test
public void testRemove() {
MyStack<Integer> stack = new MyStack<>();
stack.push(1);
stack.push(2);
stack.push(3);
stack.push(4);
stack.push(5);
Assert.assertEquals(5, stack.size());
StackUtil.remove(stack, 3);
Assert.assertEquals(4, stack.size());
Assert.assertEquals(5, stack.pop().intValue());
Assert.assertEquals(4, stack.pop().intValue());
Assert.assertEquals(2, stack.pop().intValue());
Assert.assertEquals(1, stack.pop().intValue());
}
public void testGetTop() {
MyStack<Integer> stack = new MyStack<>();
stack.push(1);
stack.push(2);
stack.push(3);
stack.push(4);
stack.push(5);
Assert.assertEquals(5, stack.size());
Integer[] integerReal = StackUtil.getTop(stack, 3);
int[] intExpeted = { 1, 2, 3 };
int[] intReal = new int[integerReal.length];
for (int i = 0; i < integerReal.length; i++) {
intReal[i] = integerReal[i];
}
Assert.assertEquals(5, stack.size());
Assert.assertArrayEquals(intExpeted, intReal);
}
@Test
public void testIsValidPair(){
String stringTrue = "([e{d}f])";
String stringFalse = "([b{x]y})";
Assert.assertTrue(StackUtil.isValidPairs(stringTrue));
Assert.assertFalse(StackUtil.isValidPairs(stringFalse));
}
}