【笔记】Eclipse and Java for Total Beginners—008

Lesson 08 – Add Person to Book Class

• Create a relationship between the Book class and the Person class
• Test getPerson method
• Create JUnit Test Suite

1. 本课的任务

• 目前，已创建Person class 和 Book class。
• 需要显示哪个人借了哪本书。
• 要创建Book 和Person之间的关联。
• 仍用test-first方法。

2. 步骤

     打开BookTest,添加method.

• 创建testGetPerson() method.
• 创建getPerson() method.
• Run and test.

     当然，这里还是用quick fix创建相应的method。在代码里，注意Access Modifiers

• public = access from any class
• private = access only from this class
• no modifier = access only from this package

     完成这步后，

• Book class and Person class are related.
• Book class depends on Person class.
• One-to-one relationship ( 1 book to 1 person ) .

3. 新招

    1> 给多行加/取消注释//，用Ctrl+/。

    2> JUnit Test Suite

    BookTest代码里有2个test，可用JUnit Test Suite达到一键测试的目的。创建步骤：

    RC package / New / Other / JUnit / JUnit Test Suite / Next …

4. 小结

• 创建Book和Person class之间的关联。
• 创建这个应用程序的一键测试。

  
    

   
      1 
   
     package
   
      org.totalbeginner.tutorial;

   
      2 
   
     

   
      3 
   
      
   
     import
   
      org.totoalbeginner.tutorial.Person;

   
      4 
   
     

   
      5 
   
      
   
     import
   
      junit.framework.TestCase;

   
      6 
   
     

   
      7 
   
      
   
     public
   
      
   
     class
   
      BookTest 
   
     extends
   
      TestCase {

   
      8 
   
      

   
      9 
   
      
   
     public
   
      
   
     void
   
      testBook() {

   
     10 
   
      Book b1 
   
     =
   
      
   
     new
   
      Book(
   
     "
   
     Great Expectations
   
     "
   
     );

   
     11 
   
      assertEquals(
   
     "
   
     Great Expectations
   
     "
   
     , b1.title);

   
     12 
   
      assertEquals(
   
     "
   
     unknown author
   
     "
   
     , b1.author);

   
     13 
   
      }

   
     14 
   
     

   
     15 
   
      
   
     public
   
      
   
     void
   
      testGetPerson() {

   
     16 
   
      Book b2 
   
     =
   
      
   
     new
   
      Book(
   
     "
   
     War and Peace
   
     "
   
     );

   
     17 
   
      Person p2 
   
     =
   
      
   
     new
   
      Person();

   
     18 
   
      p2.setName(
   
     "
   
     Elvis
   
     "
   
     );

   
     19 
   
      

   
     20 
   
      
   
     //
   
      method to say book is loaded to this person
   
     

   
     21 
   
      
   
      b2.setPerson(p2);

   
     22 
   
      

   
     23 
   
      
   
     //
   
      get the name of the person who has the book

   
     24 
   
      
   
     //
   
      Person testPerson = b2.getPerson();

   
     25 
   
      
   
     //
   
      String testName = testPerson.getName();
   
     

   
     26 
   
      
   
      

   
     27 
   
      String testName 
   
     =
   
      b2.getPerson().getName();

   
     28 
   
      assertEquals(
   
     "
   
     Elvis
   
     "
   
     , testName);

   
     29 
   
      }

   
     30 
   
     }
  
    

  
    

   
      1 
   
     package
   
      org.totalbeginner.tutorial;

   
      2 
   
     

   
      3 
   
     
   
     import
   
      org.totoalbeginner.tutorial.Person;

   
      4 
   
     

   
      5 
   
     
   
     public
   
      
   
     class
   
      Book {

   
      6 
   
     

   
      7 
   
      String title;

   
      8 
   
      String author;

   
      9 
   
      Person person;

   
     10 
   
     

   
     11 
   
      
   
     public
   
      Book(String string) {

   
     12 
   
      
   
     this
   
     .title 
   
     =
   
      string;

   
     13 
   
      
   
     this
   
     .author 
   
     =
   
      
   
     "
   
     unknown author
   
     "
   
     ;

   
     14 
   
      }

   
     15 
   
     

   
     16 
   
      
   
     public
   
      String getAuthor() {

   
     17 
   
      
   
     return
   
      author;

   
     18 
   
      }

   
     19 
   
     

   
     20 
   
      
   
     public
   
      
   
     void
   
      setAuthor(String author) {

   
     21 
   
      
   
     this
   
     .author 
   
     =
   
      author;

   
     22 
   
      }

   
     23 
   
     

   
     24 
   
      
   
     public
   
      String getTitle() {

   
     25 
   
      
   
     return
   
      title;

   
     26 
   
      }

   
     27 
   
     

   
     28 
   
      
   
     public
   
      
   
     void
   
      setPerson(Person p2) {

   
     29 
   
      
   
     this
   
     .person 
   
     =
   
      p2;

   
     30 
   
      

   
     31 
   
      }

   
     32 
   
     

   
     33 
   
      
   
     public
   
      Person getPerson() {

   
     34 
   
      

   
     35 
   
      
   
     return
   
      
   
     this
   
     .person;

   
     36 
   
      }

   
     37 
   
     

   
     38 
   
     }
  
    

  
    

   
      1 
   
     package
   
      org.totalbeginner.tutorial;

   
      2 
   
     

   
      3 
   
     
   
     import
   
      junit.framework.Test;

   
      4 
   
     
   
     import
   
      junit.framework.TestSuite;

   
      5 
   
     

   
      6 
   
     
   
     public
   
      
   
     class
   
      AllTests {

   
      7 
   
     

   
      8 
   
      
   
     public
   
      
   
     static
   
      Test suite() {

   
      9 
   
      TestSuite suite 
   
     =
   
      
   
     new
   
      TestSuite(AllTests.
   
     class
   
     .getName());

   
     10 
   
      
   
     //
   
     $JUnit-BEGIN$
   
     

   
     11 
   
     
   
      suite.addTestSuite(BookTest.
   
     class
   
     );

   
     12 
   
      suite.addTestSuite(PersonTest.
   
     class
   
     );

   
     13 
   
      
   
     //
   
     $JUnit-END$
   
     

   
     14 
   
     
   
      
   
     return
   
      suite;

   
     15 
   
      }

   
     16 
   
     

   
     17 
   
     }