What is test development?

Test Development is a comprehensive activity that includes requirements analysis, design, writing, and maintenance of test artifacts (test cases, test scenarios, automation scripts) to verify the functionality and quality of software.

Stages of test development:

1. Requirements analysis: Studying specifications, user stories, design documents to understand the expected system behavior.
2. Test Design: Defining testing approaches, test design techniques (equivalence classes, boundary values, decision tables, etc.), selecting testing types. Formulating high-level test ideas.
3. Writing test artifacts: Detailing test ideas into specific test cases with steps, preconditions, postconditions, and expected results. For automation — writing test scripts.
4. Review of test artifacts: Peer review of test cases and scripts to ensure completeness, correctness, and clarity.
5. Maintenance: Updating test artifacts when requirements or system functionality change, refactoring automated tests.

The goal of test development is to create an effective and maintainable set of checks that allows timely defect detection and minimizes quality risks.

Example of a simple manual test case structure:

Field	Description
Test Case ID	TC_LOGIN_001
Name	Successful login
Description	Verify login to the system
Preconditions	User is registered
Steps to execute	1. Go to login page<br>2. Enter correct login<br>3. Enter correct password<br>4. Click "Login"
Expected result	User is successfully logged in and redirected to the main page

Example of a simple automated test (Java, Selenium WebDriver):

// Class for login test
public class LoginTest {

    // Test method for successful login
    @Test
    public void testSuccessfulLogin() {
        // Initialize WebDriver
        WebDriver driver = new ChromeDriver();
        driver.get("http://example.com/login"); // Navigate to login page

        // Find elements and input data
        WebElement usernameField = driver.findElement(By.id("username"));
        WebElement passwordField = driver.findElement(By.id("password"));
        WebElement loginButton = driver.findElement(By.id("loginButton"));

        usernameField.sendKeys("valid_user"); // Enter login
        passwordField.sendKeys("correct_password"); // Enter password
        loginButton.click(); // Click button

        // Verify expected result (e.g., URL after login)
        String currentUrl = driver.getCurrentUrl();
        Assert.assertEquals("http://example.com/dashboard", currentUrl, "Redirect error after successful login");

        // Close browser
        driver.quit();
    }
}