How to make your Selenium tests dynamic with realistic random data

The following short test automates a simple user registration flow:

public class UserRegistrationTests {

   //urls
   private static final String REGISTER_PAGE_URL = 
       "https://parabank.parasoft.com/parabank/register.htm";

   private static final String URL = "https://parabank.parasoft.com";

   //test data
   private static final String FIRST_NAME = "Stan";
   private static final String LAST_NAME = "McGlynn";
   private static final String ADDRESS = "2690 Weston Canyon";
   private static final String CITY = "Port Jutta";
   private static final String STATE = "Alberta";
   private static final String ZIP_CODE = "P7E 2N2";
   private static final String PHONE = "(365) 317-1322";
   private static final String SSN = "647-65-6745";
   private static final String USERNAME = "cleveland.gutkowski";
   private static final String PASSWORD = "al2qxycn3zq";

   private ChromeDriver driver;

   //locators
   private By registerLinkXpath = By.xpath("//a[text() = 'Register']");

   private By firstNameId = By.id("customer.firstName");
   private By lastNameId = By.id("customer.lastName");
   private By addressId = By.id("customer.address.street");
   private By cityId = By.id("customer.address.city");
   private By stateId = By.id("customer.address.state");
   private By zipCodeId = By.id("customer.address.zipCode");
   private By phoneId = By.id("customer.phoneNumber");  
   private By ssnId = By.id("customer.ssn");
   private By usernameId = By.id("customer.username");
   private By passwordId = By.id("customer.password");
   private By repeatedPasswordId = By.id("repeatedPassword");

   private By registerButtonXpath = By.xpath("//input[@value = 'Register']");

   @Before
   public void setUp() {
      driver = new ChromeDriver();
      driver.manage().window().maximize();
   }

   @After
   public void tearDown() {
      driver.quit();
   }

   @Test
   public void userCanRegisterTest() throws InterruptedException {

      driver.get(URL);
      Assert.assertTrue(driver.getCurrentUrl().contains(URL));

      WebElement registerLink = driver.findElement(registerLinkXpath);
      registerLink.click();

      Assert.assertTrue(driver.getCurrentUrl().contains(REGISTER_PAGE_URL));

      WebElement firstNameBox = driver.findElement(firstNameId);
      firstNameBox.sendKeys(FIRST_NAME);

      WebElement lastNameBox = driver.findElement(lastNameId);
      lastNameBox.sendKeys(LAST_NAME);

      WebElement addressBox = driver.findElement(addressId);
      addressBox.sendKeys(ADDRESS);

      WebElement cityBox = driver.findElement(cityId);
      cityBox.sendKeys(CITY);

      WebElement stateBox = driver.findElement(stateId);
      stateBox.sendKeys(STATE);

      WebElement zipBox = driver.findElement(zipCodeId);
      zipBox.sendKeys(ZIP_CODE);

      WebElement phoneBox = driver.findElement(phoneId);
      phoneBox.sendKeys(PHONE);

      WebElement ssnBox = driver.findElement(ssnId);
      ssnBox.sendKeys(SSN);

      WebElement usernameBox = driver.findElement(usernameId);
      usernameBox.sendKeys(USERNAME);

      WebElement passwordBox = driver.findElement(passwordId);
      passwordBox.sendKeys(PASSWORD);

      WebElement repeatedPasswordBox = driver.findElement(repeatedPasswordId);
      repeatedPasswordBox.sendKeys(PASSWORD);

      Thread.sleep(5000);

      WebElement registerButton = driver.findElement(registerButtonXpath);
      registerButton.click();

  }  

}

The test is very straightforward.

It sets a value in each registration field and then clicks the registration button.

There is only 1 problem with it.

Every time it runs, it uses the same data from the following constants:

private static final String FIRST_NAME = "Stan";
private static final String LAST_NAME = "McGlynn";
private static final String ADDRESS = "2690 Weston Canyon";
private static final String CITY = "Port Jutta";
private static final String STATE = "Alberta";
private static final String ZIP_CODE = "P7E 2N2";
private static final String PHONE = "(365) 317-1322";
private static final String SSN = "647-65-6745";
private static final String USERNAME = "cleveland.gutkowski";
private static final String PASSWORD = "al2qxycn3zq";

The test would be so much better if it runs every time on different data.