【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。

package org.totalbeginner.tutorial;

 import org.totoalbeginner.tutorial.Person;

 import junit.framework.TestCase;

 public class BookTest extends TestCase {
    
    public void testBook() {
        Book b1 = new Book("Great Expectations");
        assertEquals("Great Expectations", b1.title);
        assertEquals("unknown author", b1.author);
    }

    public void testGetPerson() {
        Book b2 = new Book("War and Peace");
        Person p2 = new Person();
        p2.setName("Elvis");
        
        // method to say book is loaded to this person
         b2.setPerson(p2);
        
        // get the name of the person who has the book
 //        Person testPerson = b2.getPerson();
 //        String testName = testPerson.getName();
         
        String testName = b2.getPerson().getName();
        assertEquals("Elvis", testName);
    }
}

package org.totalbeginner.tutorial;

import org.totoalbeginner.tutorial.Person;

public class Book {

    String title;
    String author;
    Person person;

    public Book(String string) {
        this.title = string;
        this.author = "unknown author";
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getTitle() {
        return title;
    }

    public void setPerson(Person p2) {
        this.person = p2;
        
    }

    public Person getPerson() {
        
        return this.person;
    }

}

package org.totalbeginner.tutorial;

import junit.framework.Test;
import junit.framework.TestSuite;

public class AllTests {

    public static Test suite() {
        TestSuite suite = new TestSuite(AllTests.class.getName());
        //$JUnit-BEGIN$
        suite.addTestSuite(BookTest.class);
        suite.addTestSuite(PersonTest.class);
        //$JUnit-END$
        return suite;
    }

}