Real World Example · Interacting with Elements in Selenium | Selenium

Real World Example

Login Checks with Many Users

In a bank or insurance project, the login screen is tested with many users: valid, locked, expired password, blank fields. The Selenium part stays the same; only the data changes. First the data and expected results, as runnable Java:

Example

Expected result for each login data row:

import java.util.*;

public class Main {
    record LoginCase(String email, String password, String expected) {}

    public static void main(String[] args) {
        List<LoginCase> cases = List.of(
            new LoginCase("[email protected]", "Test@123", "/account"),
            new LoginCase("[email protected]", "wrong", "Invalid email or password"),
            new LoginCase("[email protected]", "Test@123", "Your account is locked"),
            new LoginCase("", "", "Please fill out this field."));
        int n = 1;
        for (LoginCase c : cases) {
            String who = c.email().isEmpty() ? "(blank)" : c.email();
            System.out.printf("Case %d: %-16s -> expect %s%n", n++, who, c.expected());
        }
    }
}

Output

Case 1: [email protected]   -> expect /account
Case 2: [email protected]   -> expect Invalid email or password
Case 3: [email protected]  -> expect Your account is locked
Case 4: (blank)          -> expect Please fill out this field.

The Selenium Loop

for (LoginCase c : cases) {
    driver.get("https://shopease.example.com/login");
    driver.findElement(By.id("email")).sendKeys(c.email());
    driver.findElement(By.id("password")).sendKeys(c.password());
    driver.findElement(By.id("login-btn")).click();
    String actual = driver.getCurrentUrl().endsWith("/account") ? "/account"
            : driver.findElements(By.cssSelector(".error-message")).isEmpty()
                ? driver.findElement(By.id("email")).getDomProperty("validationMessage")
                : driver.findElement(By.cssSelector(".error-message")).getText();
    System.out.println((actual.equals(c.expected()) ? "PASS " : "FAIL ") + c.email());
    driver.manage().deleteAllCookies();      // log out for the next case
}

Example

Output:

Run LoginDataTest.main()

Example output

PASS [email protected]
PASS [email protected]
PASS [email protected]
PASS

In the medium level TestNG's @DataProvider replaces this hand-written loop, adds proper reporting and runs each row as its own test.