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 }