Computer Science

Assume that I have a book store which sells books. I want to create an application to calculates min, max, and average price of sold books.

I want to build a JUnit test case to test min, max, average methods of this application, and throw an appropriate exception for each of the following cases.

• When populating the array of Book objects, application should throw a specific exception for array, not general exception, if test case passed more book objects than array capacity to application. Array capacity is defined as (nBooks = 5 ;). Do not use java scan. Build allocation programmatically.

• Use ONLY ARRAY. NOT LIST, NOT ARRAY List, or any other data structures for this assignment.

• When calculating the average sales, throw specific exception for divide by zero not general exception, if ZERO books were sold.

• Build test statistic, demonstrate how many test cases passed, and how many failed due to Assertion Error. Use logic to build test statistics and display it with Junit-5 Test Reporter object.

Assignment Process

1. Build Book class.

• Book

public class Book {

//instance variables // (int id; String name; double price)

//constructor

// getter/setter methods

}

2. Build application class to drive book objects.

• Application

public class BookApp {

//Class name in Java starts with uppercase letter (e.g. BookApp)

//Method name in java starts with lowercase

//(e.g. populateBooks)

//Build one method for each application ‘s functionality as follows.

//A method to populate Array of Book objects.

//A method to calculate the minimum price of books.

//A method to calculate the maximum price of books.

// A method to calculate the average price of books.

}

3. Build JUnit Test case to test the book application.

• TestCase

public BookTestCase {

// instance/class variables

// constructor

@BeforeEach // or @BeforeAll

@Test

// Build one test method for each

// application’s method

//method name starts with lower case “test”

// (e.g.

public void testPopulateBooks () {…}

@AfterEach // or @AfterAll

}

4. Build and run eclipse project.

• Create a java project and name it ,“book”.

• Create a package under the project and name it.

• (e.g. “susan.assignment1.junit5.book.test”).

• Compile and run the test case as

i. “JUnit Test”.