[英]Java Unit Testing Help for loop
public void login(String username, String password) {
for(int i = 0; i < Users.size(); i++) {
user users = (user) Users.get(i);
if(users.getUsername().contains(username)
&& users.getPassword().contains(password)) {
userName = users.getUsername();
userLevel = users.getUserLevel();
isSuccess = true;
}
}
}
Hello everyone. 大家好。 I'm trying to do a java unit testing for this method using Java Junit. 我正在尝试使用Java Junit对此方法进行java单元测试。 But i don't know how to do that? 但我不知道该怎么办? Because there's a for loop. 因为有一个for循环。
Let me explain the method. 让我解释一下这个方法。
for(int i=0;i<Users.size();i++){
This "Users" is a vector. 这个“用户”是一个向量。 This loop runs unit this vector ends. 此循环运行单元此向量结束。
user users = (user) Users.get(i);
Then im calling user class for user instance. 然后我为用户实例调用用户类。
if((users.getUsername().contains(username)) &&
(users.getPassword().contains(password))) {
Then if any of the users that matches with the values in the vectors, this gives the output. 然后,如果任何与向量中的值匹配的用户,则给出输出。
Can anyone tell me how to write a unit test for this? 谁能告诉我如何为此编写单元测试?
Your code is hard to read. 您的代码很难阅读。 Learn Java coding standards . 学习Java编码标准 。
Your method should not be printing anything. 你的方法不应该打印任何东西。 Determine if the user is valid. 确定用户是否有效。 Print messages elsewhere. 在别处打印消息。
I'll assume you've got a class User that encapsulates credentials: 我假设你有一个封装凭证的类用户:
package misc.user;
import org.apache.commons.lang3.StringUtils;
/**
* Created by Michael
* Creation date 8/5/2017.
* @link https://stackoverflow.com/questions/45524768/java-unit-testing-help-for-loop
*/
public class User {
private final String username;
private final String password;
public User(String username, String password) {
if (StringUtils.isBlank(username)) throw new IllegalArgumentException("username cannot be blank or null");
if (StringUtils.isBlank(password)) throw new IllegalArgumentException("password cannot be blank or null");
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
@Override
public boolean equals(Object o) {
if (this == o) { return true; }
if (o == null || getClass() != o.getClass()) { return false; }
User user = (User) o;
if (!getUsername().equals(user.getUsername())) { return false; }
return getPassword().equals(user.getPassword());
}
@Override
public int hashCode() {
int result = getUsername().hashCode();
result = 31 * result + getPassword().hashCode();
return result;
}
@Override
public String toString() {
return "{\"User\":{"
+ "\"username\":\"" + username + "\""
+ ",\"password\":\"" + password + "\""
+ "}}";
}
}
I'd test it using JUnit : 我用JUnit测试它:
package misc.user;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
/**
* Created by Michael
* Creation date 8/5/2017.
* @link https://stackoverflow.com/questions/45524768/java-unit-testing-help-for-loop
*/
public class UserTest {
private static List<User> users;
@BeforeClass
public static void setUp() {
users = new ArrayList<>();
users.add(new User("FooBar", "myPassword"));
users.add(new User("GeorgeBush", "exPrez"));
users.add(new User("weatherBoy", "cloudy"));
}
@Test
public void testLogin_Success() {
// setup
String username = "weatherBoy";
String password = "cloudy";
// exercise
boolean isValidUser = users.contains(new User(username, password));
// assert
Assert.assertTrue(isValidUser);
}
@Test
public void testLogin_Failure() {
// setup
String username = "noSuchUser";
String password = "does not matter";
// exercise
boolean isValidUser = users.contains(new User(username, password));
// assert
Assert.assertFalse(isValidUser);
}
}
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