Recommended Free Tools
Use JUnit Jupiter’s @ParameterizedTest with an argument source such as @CsvSource to run the same Selenium test once for each input row. Add junit-jupiter-params, make sure your build runs the Jupiter engine, and close each WebDriver session even when an assertion fails. The example below shows a browser session per invocation, with the input and expected result visible in each test’s display name.
What a parameterized Selenium test needs
JUnit Jupiter supplies the test runner and the values for each invocation; Selenium’s Java binding sends commands to the browser. A parameterized test needs both the @ParameterizedTest annotation and at least one argument source. Its source must provide values that match the test method’s parameters. See the JUnit 5.14.1 User Guide and the JUnit 5.13.1 API reference for source rules and method constraints.
The parameterized-test API requires the test method not be private or static. JUnit also needs its parameter-support artifact, junit-jupiter-params, and a build setup that discovers and runs Jupiter tests. Keep JUnit components on a consistent release or BOM strategy rather than mixing arbitrary versions.
Add the test dependencies
For Maven, declare Selenium’s Java binding and JUnit Jupiter dependencies in the project. This example uses Maven’s dependency management with the JUnit BOM; replace the Selenium version with one supported by your project and check the current Selenium installation guidance before adopting a version. Selenium’s official installation page includes Maven and Gradle examples: Selenium WebDriver: Install a Selenium library.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.junit</groupId>
<artifactId>junit-bom</artifactId>
<version>5.14.1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>YOUR_SUPPORTED_SELENIUM_VERSION</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiterIn a real Maven file, complete the last dependency with <version>5.14.1</version> (managed by the imported BOM) and <scope>test</scope>, then add a second test-scoped dependency for org.junit.jupiter:junit-jupiter-params. If your build already imports a JUnit BOM, use that project’s aligned version instead. Configure a test runner or build plugin that executes JUnit Jupiter; the artifact alone does not make a non-Jupiter runner discover the test.
Choose an argument source that fits the cases
@ValueSourceis concise when each invocation needs one argument.@CsvSourceputs small, fixed rows of multiple values beside the test. Each row becomes an invocation, with fields converted to the method parameter types where supported.@MethodSourceis a better fit for larger, computed, or constructed cases. It can provide anArgumentsstream or another return type accepted by JUnit.
Choose based on how much data you have, whether cases are easier to read inline or in Java, and how often they change. Check the relevant section of the JUnit User Guide for method-source visibility, argument conversion, aggregation, and source-specific requirements rather than assuming every source behaves identically.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Write the test with a session per invocation
This CSV example is schematic: replace the example URL, selectors, and expected headings with those from your application. Each argument row runs the test method separately, and the display name includes both inputs to make failed invocations easier to identify.
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
class SearchFormTest {
@ParameterizedTest(name = "search for {0} gives {1}")
@CsvSource({
"selenium, Selenium results",
"junit, JUnit results"
})
void searchShowsExpectedHeading(String query, String expectedHeading) {
WebDriver driver = new ChromeDriver();
try {
driver.get("https://example.test/search");
driver.findElement(By.name("q")).sendKeys(query);
driver.findElement(By.cssSelector("button[type='submit']")).click();
assertEquals(expectedHeading,
driver.findElement(By.cssSelector("h1")).getText());
} finally {
driver.quit();
}
}
}The test creates a fresh browser for each invocation and puts quit() in a finally block, so an assertion failure does not skip cleanup. Alternatively, use JUnit lifecycle hooks: create the driver in @BeforeEach and close it in @AfterEach. Selenium’s Java example demonstrates that setup/teardown pattern, including a null check before quitting: Selenium WebDriver: First script.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallCrashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteRank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Use a method source for richer test data
When cases need objects, calculations, or more than a few inline rows, keep the provider in code and expose meaningful invocation names. For example, a provider can return Stream<Arguments>; adapt the record and expected value to the application under test.
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.stream.Stream;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
class SearchFormMethodSourceTest {
static Stream<Arguments> searchCases() {
return Stream.of(
Arguments.of("selenium", "Selenium results"),
Arguments.of("junit", "JUnit results")
);
}
@ParameterizedTest(name = "query {0} displays {1}")
@MethodSource("searchCases")
void searchShowsExpectedHeading(String query, String expectedHeading) {
WebDriver driver = new ChromeDriver();
try {
driver.get("https://example.test/search");
driver.findElement(By.name("q")).sendKeys(query);
driver.findElement(By.cssSelector("button[type='submit']")).click();
assertEquals(expectedHeading,
driver.findElement(By.cssSelector("h1")).getText());
} finally {
driver.quit();
}
}
}Static providers are a common straightforward choice; follow the current guide if using a non-static provider or a different supported source form. Keep each invocation independent: a provider supplies cases, not browser isolation, so avoid shared mutable browser state unless the lifecycle and concurrency behavior are intentional.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Manage drivers and choose where browsers run
Local execution
Start with a local browser when developing the test. Selenium Manager is bundled with current Selenium bindings and can act as a fallback when a driver has not been supplied; manually downloading a driver is therefore not mandatory in every setup. See Selenium Manager for current behavior and limitations. Browser availability and compatibility still depend on the machine and installed software.
Remote execution
Use Selenium Grid when the suite needs distributed execution or a broader matrix of browsers and operating systems. Grid changes where WebDriver commands run; the JUnit parameter source and test method still define the input cases. Selenium’s documentation describes scaling across browser and operating-system combinations: Selenium Grid. Compare the extra setup and operational control against the browser/OS coverage your suite needs.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Handle failures and keep runs reliable
- No parameter source: Add an argument source such as
@ValueSource,@CsvSource, or@MethodSourcealongside@ParameterizedTest. - Argument mismatch: Make the number and types of provided values match the method parameters. Check CSV delimiters, quoting, and conversion rules for values that contain commas or need non-string types.
- Tests are not discovered: Confirm
junit-jupiter-paramsis present, JUnit components are aligned, and the Maven/Gradle test setup runs the Jupiter engine rather than only a different JUnit runner. - Browser remains open after a failure: Ensure session cleanup is guaranteed with
finallyor a lifecycle teardown hook. Do not putquit()only after the assertion. - Driver startup fails: Check that the browser is installed and supported, inspect the Selenium Manager output, and supply a compatible driver explicitly if automatic management is unsuitable for the environment.
- Intermittent failures under parallel runs: Check whether invocations share a browser, account, data record, or application state. Use isolated sessions and test data, or control parallel execution when shared resources cannot safely be used concurrently.
Parameterized tests produce separate invocations, which improves failure localization when names expose the case. They do not make those invocations safe to run concurrently against shared state; decide lifecycle and parallel execution together.
Or skip the browser setup
If your goal is a screenshot rather than an interactive assertion against a live browser, ScreenshotNeo is a website screenshot API and MCP server. One GET request captures a URL as PNG, JPEG, WebP, or PDF. Here is the cURL form, with the screenshot parameters and output path visible:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.test/search -o shot.webpSee the ScreenshotNeo API documentation for request options. Cookie banners, newsletter popups, and chat widgets are removed before capture; bot checks, blank pages, failed loads, timeouts, and cache hits are not billed. An MCP server lets AI agents use take_screenshot, get_page_info, and capture_pdf. The free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000. Sign up for free ScreenshotNeo screenshots.
Frequently Asked Questions
Can a parameterized test use more than one argument source?
A parameterized test needs an argument source, and source annotations and argument consumption have specific rules. Consult the JUnit guide for the supported combinations and how arguments are supplied.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Does Selenium Manager remove the need to install a browser?
No. Selenium Manager can help manage a missing driver, but the browser itself must be available in the execution environment.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
