[Solved] BookOrder class isn’t rendering results in Test

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Because you are not initializing any thing in your constructor so it takes default value for all variable in you class. So you can change your constructor like :

private String author;      
private String title;
private int quantity;
private double costPerBook;
private String orderDate;
private double weight;
private char type;      //R,O,F,U,N

public BookOrder(String author, String title, int quanitity, double costPerBook, String orderDate, double weight, char type)
{
  this.author = author; 
  this.title =title;
  this.quanitity =quanitity;

  // others also
}

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solved BookOrder class isn’t rendering results in Test