package com.coding.basic;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
/**
* Created by mark on 17/2/25.
*/
public class StackTest {
private Stack stack;
@Before
public void setUp() throws Exception {
stack = new Stack();
}
@After
public void tearDown() throws Exception {
stack = null;
}
@Test
public void push() throws Exception {
stack.push("first");
stack.push("second");
Assert.assertEquals("second", stack.pop());
Assert.assertEquals("first", stack.pop());
Assert.assertEquals(0, stack.size());
}
@Test
public void pop() throws Exception {
}
@Test
public void peek() throws Exception {
stack.push("first");
stack.push("second");
Assert.assertEquals("second", stack.peek());
stack.pop();
Assert.assertEquals("first", stack.peek());
}
@Test
public void isEmpty() throws Exception {
Assert.assertEquals(true, stack.isEmpty());
stack.push("first");
Assert.assertEquals(false, stack.isEmpty());
stack.pop();
Assert.assertEquals(true, stack.isEmpty());
}
@Test
public void size() throws Exception {
Assert.assertEquals(0, stack.size());
stack.push("first");
Assert.assertEquals(1, stack.size());
stack.push("second");
Assert.assertEquals(2, stack.size());
stack.pop();
stack.pop();
Assert.assertEquals(0, stack.size());
}
}