Exception Testing & Timeouts
Verify expected exceptions and implement timeouts to prevent infinite loops or long-running test cases.
Test for Expected Errors
Sometimes, your code is designed to throw an error under specific, invalid conditions. For example, dividing by zero. Exception testing ensures that your code handles these situations correctly.
- It validates both the success and failure paths.
- It confirms your error messages are accurate.
Catching Exceptions with JUnit
JUnit 5 provides the assertThrows method to verify that a specific exception is thrown. This is the recommended and cleanest way to test for expected exceptions.
- It takes the expected exception type (e.g.,
IllegalArgumentException.class). - It takes a lambda expression (a small piece of code) that should trigger the exception.
All lessons in this course
- Test Lifecycle and Ordering
- Parameterized and Dynamic Tests
- Exception Testing & Timeouts
- Conditional Tests and Assumptions