CustomerTests07.java

/*
 * $
 *
 * Copyright (C) 2019 Cefalo AS.
 * All Rights Reserved.  No use, copying or distribution of this
 * work may be made except in accordance with a valid license
 * agreement from Cefalo AS.  This notice must be included on all
 * copies, modifications and derivatives of this work.
 */
package com.cefalo.tdd;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

/**
 * @author <a href="mailto:fmshaon@gmail.com">Ferdous Mahmud Shaon</a>
 * @author last modified by $
 * @version $ $
 */
public class CustomerTests07 {
  /*
  * Customer has following properties:
  * Name: name of the customer, String, Mandatory
  *
  * RewardPoints: the total reward points of a customer, default value: 0, integer
  *               value can only be set >=0, otherwise throws IllegalArgumentException
  *
  * purchaseGoods(int amount): increase the total RewardPoints count based on the following formula:
  *                            total RewardPoints count += ceil(amount * 0.1)
  *                            the amount cannot be <0, otherwise throw IllegalArgumentException
  *
  * redeemPoints(int points): decrease the total RewardPoints count by the given number of points
  *                          if the given number of points < total RewardPoints count
  *                          otherwise throw IllegalArgumentException
  *
  * */

  private Customer customer;

  @BeforeEach
  public void setUpCustomer() {
    customer = new Customer("Arnab");
  }
  @Test
  public void testCustomerWithNameOnly() {
    assertEquals("Arnab", customer.getName());
  }
  @Test
  public void testCustomerWithRewardPoints() {
    customer.setRewardPoints(100);
    assertEquals(100, customer.getRewardPoints());
  }
  @Test
  public void testCustomerWithDefaultRewardPoints() {
    assertEquals(0, customer.getRewardPoints());
  }
  @Test
  public void testCustomerWithNegativeRewardPoints() {
    assertThrows(IllegalArgumentException.class, () -> customer.setRewardPoints(-10));
  }
  @Test
  public void testCustomerWithPurchaseGoods() {
    customer.setRewardPoints(100);
    customer.purchaseGoods(200);
    assertEquals(120,customer.getRewardPoints());
  }
}