J2EE Onsite Skype Interview 1

Calculate Total Price Exercise

Accept 3 inputs from the user:

● How many items

● Price per item

● 2-letter state code

Output the total price. Give a discount based on the total price, add state tax based on the state and the discounted price.

Order Value	Discount Rate
$1000	3%
$5000	5%
$7000	7%
$10000	10%
$50000	15%

State	Tax Rate
UT	6.85%
NV	8.00%
TX	6.25%
AL	4.00%
CA	8.25%

Acceptance Tests:

First Test

When an item price is 493.87

And an item quantity is 15

And a state is CA

Then the total price is 7,457.87

Second Test

When an item price is 1,493.87

And an item quantity is 825

And a state is UT

Then the total price is 1,119,335.32

Implement Test Driven Development Methodology

• 必须知道什么是TDD以及TDD的Best Practice
• 得分点: 分成两个文件夹Test 和 Java
• 得分点: 先写测试
• 得分点：测试类名必须是XXXTest.java
• 得分点：测试类和被测试类必须在同一个package里面，例如model
• 熟悉JUnit API了解 assertEquals方法如何测试double类型
• 计算折扣的业务逻辑非常容易搞错
• floating point numbers are not perfectly precise
• price 设计成 int 表示美分也是也是一个重要的点