How to Use the DataProvider in TestNG with a JAVA Example
A DataProvider feeds many input sets into one test method, which keeps cases out of the code.
Test Automation
All articles, page 12 of 13
Newest first. 310 load testing, JMeter, test automation and monitoring guides, plus tool comparisons. Browse by topic from the blog home.
Apache JMeter
How to Save Apache JMeter Results to a CSV file or XML file?
Two ways to save Apache JMeter results: the -l flag with jmeter.save.saveservice properties for CSV, or XML for the full sample detail. With examples.
Test Automation
How to Open a New Tab using Selenium WebDriver with Java?
Open a new tab in Selenium WebDriver with Java: Selenium 4's switchTo().newWindow(WindowType.TAB), Ctrl+click on a link, and switching between tabs by handle.
Test Automation
How to Send an Android Application to Background and Reopen It
Backgrounding and resuming is where state bugs surface, so it belongs in the test suite. Verify state after resume, not just that the app reopened.
Test Automation
How to use Explicit and Implicit Waits in Selenium WebDriver with Java
Explicit waits target a condition; implicit waits apply a blanket timeout to every lookup.
Test Automation
How to use the Overview, Home and Back buttons in Appium for Android
Appium reaches the Android system buttons through key events rather than element clicks.
Test Automation
How to find by XPath text that contains apostrophe (single quote) in Selenium WebDriver
Wrap the literal in double quotes instead, which is the simplest fix. Use concat() when the text contains both quote characters.
Test Automation
Find all the Links on a Webpage with Selenium WebDriver in Java
Find all links on a page with Selenium WebDriver in Java: findElements(By.tagName("a")), filtering hrefs, checking status codes and avoiding stale elements.
Load Testing
Understanding 500 Internal Server Errors in GET or POST Requests
Why a GET or POST request returns 500 Internal Server Error: a body the server cannot parse, missing headers or cookies, exhausted pools, and how to debug it.
Website and API Monitoring
How to MouseOver (Hover) a WebElement using Selenium WebDriver
Hover needs the Actions class; a plain click will not trigger CSS or JS hover states.
Website and API Monitoring
How to Improve Conversion Rate by Increasing Rendering Speed for Slow Websites
Above-the-fold render time matters more than total page load. Measure the change in conversion, not just the change in milliseconds.
Test Automation
Schedule Mobile Emulation to Run Continuously
Continuous mobile emulation turns a one-off check into a trend you can act on. Alert on regression rather than reviewing every run.
Website and API Monitoring
Speeding Up Selenium WebDriver Tests with Efficient Locators
Which Selenium locator is fastest? A measured test of By.id, name, CSS and XPath in Selenium 4: XPath costs a few ms more, and stability matters more.
Cloud Testing
How to Test your Websites in Smartphone & Tablet Mobile Emulators
Emulators catch layout and viewport problems quickly and cheaply. Test the viewports in your analytics rather than a generic device list.
Website and API Monitoring
How to Add UI Steps in a Automated Website Test
UI steps let you script a real journey rather than checking a single URL.
Test Automation
How to Select a Dropdown in Selenium WebDriver using Java
Use the Select class for real select elements, and normal clicks for custom widgets.
Apache JMeter
How to use User Defined Variables in Apache JMeter
How to add User Defined Variables in Apache JMeter, reference them with ${name}, override them from the CLI with -J, and keep environments in one place.
Apache JMeter
How to start Apache JMeter in non-graphical (non-GUI) mode?
Start Apache JMeter from the command line with -n -t -l -e -o, why GUI mode skews results, and how to run the same JMX at scale in the cloud.
Test Automation
How to scroll web page UP or Down using Selenium WebDriver?
Scrolling is done through the JavaScript executor, since WebDriver has no native scroll command.
Website and API Monitoring
5 Tips to Boost Page Speed and Website SEO
Page speed is a ranking factor, so a slow site costs you traffic before anyone reads a word.
Load Testing
Enable gzip compression on NGINX
gzip on NGINX is a few lines of config and usually the cheapest bandwidth win available.
Apache JMeter
How to Use Apache JMeter’s XPath Extractor?
Use JMeter's XPath2 Extractor to pull values from XML and SOAP responses, map namespaces, and see why XPath on HTML returns your default value. Tested on 5.6.3.
Cloud Testing
How to use assertions in Apache JMeter tests
Assert on content as well as status, since a wrong body is still a failure. Keep assertions cheap. Heavy ones distort the timings you are measuring.
Apache JMeter
JMeter Load Testing: A Step-by-Step Tutorial
JMeter load testing step by step: install JMeter 5.6.3, build a test plan, run it in CLI mode, read the HTML report and scale past one machine to the cloud.
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