I am currently developing a suite of automated regression tests using TestNG, and I’m confused about when to use different assertion types. My current scripts stop immediately whenever a single validation fails, which prevents me from seeing if subsequent elements on the same page are correct. I’ve heard about "Soft Asserts" as a way to handle this, but I'm not sure how they differ from the standard "Hard Assert" in terms of execution flow and reporting. Can someone explain the technical impact of each and the best practices for implementing them in a professional testing environment?
3 answers
In the world of automated testing, a Hard Assert is the default behavior. When a hard assertion fails, it throws an AssertionError and immediately terminates the current test method. This is ideal for "gatekeeper" validations where, if the condition isn't met (like a login failing), there is no point in proceeding. A Soft Assert, however, does not throw an exception immediately. It records the failure but allows the rest of the test script to continue executing. To make the test actually fail at the end, you must call the assertAll() method. This is incredibly useful for verifying multiple independent elements on a dashboard, where you want a full report of everything that is broken in a single run.
When using Soft Asserts, do you find that developers often forget to include the assertAll() call at the end, leading to tests that "pass" even though several underlying validations actually failed?
Hard asserts are for "stop-ship" bugs. Soft asserts are for collecting a list of minor issues, like incorrect text or missing icons, without stopping the whole execution.
I agree with Emily. Using them strategically ensures your automation is both robust and informative. Just remember that a single test should ideally have one main "Hard" goal and several "Soft" secondary checks.
That is a huge risk with Soft Asserts, Robert. If you omit assertAll(), the test will always be marked as passed in your CI/CD pipeline, which is a nightmare for quality management. I always tell my team to treat Soft Asserts with caution. They are great for non-critical UI checks, but for any functional logic that affects the next step of the test, a Hard Assert is much safer. It's also worth noting that debugging Soft Asserts can be harder because the failure might have happened 50 lines before the test finally stopped.