LinkedStackTest.java

import static org.junit.jupiter.api.Assertions.*;

import org.junit.jupiter.api.Test;

class LinkedStackTest {

    @Test
    void testSize() {
        LinkedStack<Integer> s = new LinkedStack<>();
        for(int i = 0; i < 10; ++i)
            s.push(i);
        assertEquals(10, s.size());
    }

    @Test
    void testIsEmpty() {
        LinkedStack<Integer> s = new LinkedStack<>();
        for(int i = 0; i < 10; ++i)
            s.push(i);
        for(int i = 0; i < 10; ++i) {
            s.pop();
        }
        assertEquals(true, s.isEmpty());
    }

    @Test
    void testPush() {
        LinkedStack<Integer> s = new LinkedStack<>();
        for(int i = 0; i < 10; ++i)
            s.push(i);
        assertEquals(10, s.size());
        assertEquals("[9, 8, 7, 6, 5, 4, 3, 2, 1, 0]", s.toString());
    }

    @Test
    void testTop() {
        LinkedStack<Integer> s = new LinkedStack<>();
        for(int i = 0; i < 10; ++i)
            s.push(i);
        assertEquals(9, s.top());
    }

    @Test
    void testPop() {
        LinkedStack<Integer> s = new LinkedStack<>();
        for(int i = 0; i < 10; ++i)
            s.push(i);
        assertEquals(9, s.pop());
        assertEquals(9, s.size());
    }

    @Test
    void testToString() {
        LinkedStack<Integer> s = new LinkedStack<>();
        for(int i = 0; i < 10; ++i)
            s.push(i);
        assertEquals("[9, 8, 7, 6, 5, 4, 3, 2, 1, 0]", s.toString());
    }
}