Mocking APIs using WireMock for testing negative cases when it is not possible to change the API behaviour
WireMock lets you produce failures a real API will not give you on demand: timeouts, 500s, malformed bodies.
Test Automation
All articles, page 11 of 13
Newest first. 300 load testing, JMeter, test automation and monitoring guides, plus tool comparisons. Browse by topic from the blog home.
Test Automation
Structuring integration tests using JUnit categories by features, API or type of tests
Categories let one suite be sliced by speed or area, so CI can run the fast set per commit.
Cloud Testing
What is a Staging Environment in Software Development?
The closer the parity, especially in data and scale, the more useful it is. A staging environment that drifts from production gives false confidence.
Test Automation
How to Visually Compare Staging vs. Production Websites Automatically
Compare the same viewport and state, or the diff is dominated by noise. Review differences rather than gating on pixel equality, which fails constantly.
Test Automation
Visual UI Regression Testing with Jest, Puppeteer and Headless Chrome
Image comparison catches visual breakage that assertions never check for. Run in a consistent environment; a different OS produces different pixels.
Test Automation
How to Click a Link by Text in Selenium WebDriver Java
linkText matches the full visible text; partialLinkText matches a substring.
Cloud Testing
How to Load Test your Cryptocurrency Exchange Service
Exchanges fail at the order book and matching engine, not at the marketing pages.
Test Automation
How to Take Screenshots with Puppeteer using Headless Chrome Browser
Puppeteer captures viewport, full-page or single-element screenshots.
Load Testing
Is My Email Campaign going to Bring my Website Down?
A campaign delivers its traffic in minutes, which is a spike rather than a load curve.
Test Automation
Screenshot Comparison Tools
Pixel comparison catches visual regressions that functional tests never assert on. Set a tolerance, or antialiasing and fonts will fail every run.
Test Automation
How to Make a Recording of your Native Application for Demo or Debugging purposes
A screen recording captures the exact sequence that reproduces a bug, which a description rarely does.
Test Automation
How to Debug ES6 in WebStorm with Babel
Debugging transpiled code needs source maps, or breakpoints land on the wrong lines.
Test Automation
Debugging the Traffic from a Native iPhone Application
A proxy between the device and the network is the only reliable way to see native app traffic.
Apache JMeter
How to use Apache JMeter’s WebDriver Sampler to Load Test the UI of an Application
The WebDriver Sampler measures real browser rendering, which HTTP samplers cannot see. Use it to measure front-end timing, not to generate volume.
Test Automation
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.
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?
Opening a tab is only half the job; you must switch the driver to the new window handle. Track handles before and after, then switch to the difference.
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
findElements with By.tagName("a") returns every anchor, including ones that are not visible.
Load Testing
Understanding 500 Internal Server Errors in GET or POST Requests
A 500 means the server failed, so the answer is in its logs rather than the request.
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.
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