要求：使用 Java 集合框架中的组件之一容纳多个作者。需要一本带有 isbn 和作者合集的书。JUnit：testValidate 指南：测试至少两种情况（一种情况是书籍属性包含正确的数据类型并且不为空也不包含空值，另一种情况不存在）。testEquals 指南：至少测试两种情况（一种情况是作者和 isbn 匹配，另一种情况不匹配）。测试至少两位作者。我的老师告诉我：testEquals你需要添加isbn和两个作者。创建一个数组列表。向其中添加两个作者。创建一个 Book 对象并添加 ArrayList 实例和 isbn。我认为这就是我所做的，作者正在印刷，但 ISBN 不是。我是一个完全的新手，我不知所措！任何人都可以帮忙吗？
编辑/添加我得到了要打印的 ISBN，但它只打印了我拥有的第二个 isbn。我需要更改什么才能让它们都打印？还是有关系？
这是输出：
Testsuite: library.domain.BookTest
equals
Author List: [Bob Smith, Jane Doe]
ISBN: 67890
validate
Author List: [Bob Smith, Jane Doe]
ISBN: 67890
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.23 sec
------------- Standard Output ---------------
equals
Author List: [Bob Smith, Jane Doe]
ISBN: 67890
validate
Author List: [Bob Smith, Jane Doe]
ISBN: 67890
------------- ---------------- ---------------
test:
Deleting: /var/folders/k7/wpgy3lw91171qxlzt4pj0cfh0000gn/T/TEST-library.domain.BookTest.xml
BUILD SUCCESSFUL (total time: 1 second)
这是我的新页面：
新 BookTest.java
package library.domain;
import java.util.ArrayList;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class BookTest {
private ArrayList<String> authorList = new ArrayList<>();
@Test
public void testEquals() //test Equals() for accuracy
{
System.out.println("equals");
authorList.add("Bob Smith");
Book book = new Book("12345", authorList);
assertEquals("expected true", true, book.equals(book));
authorList.add("Jane Doe");
book = new Book("67890", authorList);
assertEquals("expected true", true, book.equals(book));
System.out.println("Author List: " + authorList);
System.out.println("ISBN: " + book.getIsbn());
}
@Test
public void testValidate() //test Validate() for accuracy
{
System.out.println("validate");
authorList.add("Bob Smith");
Book book = new Book("12345", authorList);
assertEquals("expected true", true, book.validate());
authorList.add("Jane Doe");
book = new Book("67890", authorList);
assertEquals("expected true", true, book.validate());
System.out.println("Author List: " + authorList);
System.out.println("ISBN: " + book.getIsbn());
}
}
图书.java
package library.domain;
import java.util.ArrayList;
import java.util.Objects;
public class Book {
private String isbn;
private ArrayList<String> authorList;
public Book(String isbn, ArrayList<String> authorList)
{
this.isbn = isbn;
this.authorList = authorList;
}
public String getIsbn() //access to isbn and manages next value
{
return isbn;
}
public void setIsbn(String isbn) //assigns the input isbn to the data member isbn
{
this.isbn = isbn;
}
//assigns the input author to the data member author
public ArrayList<String> getAuthorList()
{
return authorList;
}
public void setAuthorList(ArrayList<String> authorList)
{
this.authorList = authorList;
}
@Override
public boolean equals(Object obj) //checks equality of two objects - true if same, false if different
{
if (this == obj) {
return true;
}
if (!(obj instanceof Book)) {
return false;
}
Book book = (Book) obj;
if (!this.isbn.equals(book.isbn)) {
return false;
}
if (!this.authorList.equals(book.authorList)) {
return false;
}
return true;
}
@Override
public int hashCode() //override hash
{
int hash = 7;
hash = 97 * hash + Objects.hashCode(this.authorList);
hash = 97 * hash + Objects.hashCode(this.isbn);
return hash;
}
public boolean validate() //validate isbn and author not null
{
if (isbn == null || isbn.equals("")) {
return false;
}
if (authorList == null || authorList.equals("")) {
return false;
}
{
return true;
}
}
}
BookTest.java
package library.domain;
import java.util.ArrayList;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class BookTest {
private ArrayList<String> authorList = new ArrayList<>();
private String isbn;
@Test
public void testEquals() //test Equals() for accuracy
{
System.out.println("equals");
authorList.add("Bob Smith");
authorList.add("Jane Doe");
Book book = new Book("12345", authorList);
assertEquals("expected true", true, book.equals(book));
System.out.println("Author List: " + authorList);
System.out.println("ISBN: " + isbn);
}
@Test
public void testValidate() //test Validate() for accuracy
{
System.out.println("validate");
authorList.add("Bob Smith");
authorList.add("Jane Doe");
Book book = new Book("12345", authorList);
assertEquals("expected true", true, book.validate());
System.out.println("Author List: " + authorList);
System.out.println("ISBN: " + isbn);
}
}