Why browser control drives test flow in Selenium Java - Test Execution Impact

Test Overview

This test opens a browser, navigates to a simple page, clicks a button, and verifies the result. It shows how controlling the browser step-by-step drives the test flow.

Test Code - JUnit with Selenium WebDriver

Selenium Java

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.time.Duration;

public class BrowserControlTest {
    WebDriver driver;
    WebDriverWait wait;

    @BeforeEach
    public void setUp() {
        driver = new ChromeDriver();
        wait = new WebDriverWait(driver, Duration.ofSeconds(10));
    }

    @Test
    public void testButtonClickChangesText() {
        driver.get("https://example.com/testpage");

        WebElement button = wait.until(ExpectedConditions.elementToBeClickable(By.id("changeTextBtn")));
        button.click();

        WebElement message = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("message")));
        String text = message.getText();

        assertEquals("Text changed!", text);
    }

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

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test starts and ChromeDriver is initialized	Browser window opens, ready for commands	-	PASS
2	Browser navigates to https://example.com/testpage	Page loads with a button labeled 'Change Text' and a hidden message element	Wait until button with id 'changeTextBtn' is clickable	PASS
3	Find button by id 'changeTextBtn' and click it	Button is clicked, page updates message text	-	PASS
4	Wait for message element with id 'message' to be visible	Message element appears with text 'Text changed!'	Verify message text equals 'Text changed!'	PASS
5	Close browser and end test	Browser window closes	-	PASS

Failure Scenario

Failing Condition: Button with id 'changeTextBtn' is not found or not clickable

Execution Trace Quiz - 3 Questions

What is the first action the test performs after starting?

A Open the browser and navigate to the test page

B Click the button immediately

C Verify the message text

D Close the browser

Key Result

Controlling the browser step-by-step ensures the test waits for elements to be ready before interacting, which prevents errors and makes the test reliable.