How to validate if the expected exception is being raised or not?

What is with statement?

The with statement in Python is used to wrap the execution of a block with methods defined by a context manager. A context manager is an object that defines the runtime context to be established when the with statement is executed. It is designed to simplify the setup and teardown actions that need to be executed around a block of code. The with statement ensures that resources are acquired and released properly, and it provides a cleaner syntax for try-finally blocks.

In the context of testing with pytest, the with statement is often used in conjunction with pytest. Raises to test that a block of code raises an expected exception. pytest.raises is a context manager that checks if the code inside its block raises a specific exception and fails the test if the exception is not raised.