Chuỗi xác nhận username phổ biển:
^[a-z0-9_-]{3,15}$
Description:
^ # Bắt đầu tên
[a-z0-9_-]# Tên được quay định chứa các kí tự sau:a-z,0-9,dấu gạch dưới,dấu gạch ngang
{3,15} # Tên có độ dài là từ 3 đến 15
$ # Kết thúc tênCode:
package com.codewr.javacore.regular.expression;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
*
* @author codewr
*/
public class UsernameValidator {
// ^ # Start of the line
// [a-z0-9_-] # Match characters and symbols in the list, a-z, 0-9, underscore, hyphen
// {3,15} # Length at least 3 characters and maximum length of 15
// $ # End of the line
private static final String USERNAME_PATTERN = "^[a-z0-9_-]{3,15}$";
public static void main(String[] args) {
UsernameValidator usernameValidator = new UsernameValidator();
//check username validate
boolean isValid =usernameValidator.validate("codewr12");
System.out.println("username valid is " + isValid);
}
/**
* Validate username with regular expression
*
* @param username username for validation
* @return true valid username, false invalid username
*/
public boolean validate(final String username) {
Pattern pattern = Pattern.compile(USERNAME_PATTERN);
Matcher matcher = pattern.matcher(username);
return matcher.matches();
}
}
Code UnitTest:
- codewr12, codewr_12, codewr-12 , codewr-12_smile : tên đúng
- co: tên sai vì chiều dài tên nhỏ hơn 3
- [email protected]: tên sai vì chứa kí tự không có trong chuỗi quy định @
- codewr123456789_- : tên sai vì chiều dài tên lớn hơn 15
import com.codewr.javacore.regular.expression.UsernameValidator;
import org.testng.Assert;
import org.testng.annotations.*;
/**
* Username validator Testing
* @author codewr
*
*/
public class UsernameValidatorTest {
private UsernameValidator usernameValidator;
@BeforeClass
public void initData(){
usernameValidator = new UsernameValidator();
}
@DataProvider
public Object[][] ValidUsernameProvider() {
return new Object[][]{
{new String[] {
"codewr12", "codewr_12","codewr-12" ,"codewr-12_smile"
}}
};
}
@DataProvider
public Object[][] InvalidUsernameProvider() {
return new Object[][]{
{new String[] {
"co","[email protected]","codewr123456789_-"
}}
};
}
@Test(dataProvider = "ValidUsernameProvider")
public void ValidUsernameTest(String[] Username) {
for(String temp : Username){
boolean valid = usernameValidator.validate(temp);
System.out.println("Username is valid : " + temp + " , " + valid);
Assert.assertEquals(true, valid);
}
}
@Test(dataProvider = "InvalidUsernameProvider",
dependsOnMethods="ValidUsernameTest")
public void InValidUsernameTest(String[] Username) {
for(String temp : Username){
boolean valid = usernameValidator.validate(temp);
System.out.println("username is valid : " + temp + " , " + valid);
Assert.assertEquals(false, valid);
}
}
}
Output:
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running UsernameValidatorTest
Username is valid : codewr12 , true
Username is valid : codewr_12 , true
Username is valid : codewr-12 , true
Username is valid : codewr-12_smile , true
username is valid : co , false
username is valid : [email protected] , false
username is valid : codewr123456789_- , false
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 22.486 sec
Results :
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0
Chú ý: Thêm thư viện test vào file pom.xml
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.8</version>
<scope>test</scope>
</dependency>