text: import LinkedStack from '../../src/stack/LinkedStack';
  
  test('Stack push-pop test', () => {
  
      const stack = new LinkedStack();
      stack.push(1);
      stack.push(3);
  
      expect(stack.size).toBe(2);
  
      const pop = stack.pop();
      expect(pop).toBe(3);
  
  });
  