How do you assert exceptions in JUnit 4?

How do you assert exceptions in JUnit 4?

When using JUnit 4, we can simply use the expected attribute of the @Test annotation to declare that we expect an exception to be thrown anywhere in the annotated test method. In this example, we’ve declared that we’re expecting our test code to result in a NullPointerException.

What is PHPUnit testing?

PHPUnit is a unit testing framework for the PHP programming language. It is an instance of the xUnit architecture for unit testing frameworks that originated with SUnit and became popular with JUnit. PHPUnit was created by Sebastian Bergmann and its development is hosted on GitHub.

How do you throw an exception with assert?

EqualTo(“Actual exception message”)); So if no exception is thrown, or an exception of the wrong type is thrown, the first Assert. Throws assertion will fail. However if an exception of the correct type is thrown then you can now assert on the actual exception that you’ve saved in the variable.

How do you assert that a method throws an exception Python?

How to assert that a function throws an exception in Python

  1. def passing_function():
  2. def failing_function():
  3. class ATestCase(unittest. TestCase): Test functions for Exception.
  4. def test1(self):
  5. self. assertRaises(Exception, passing_function)
  6. def test2(self):
  7. self. assertRaises(Exception, failing_function)
  8. unittest. main()

What is assert throw?

The Assert. Throws method is pretty much in a class by itself. Rather than comparing values, it attempts to invoke a code snippet, represented as a delegate, in order to verify that it throws a particular exception.

What is use of assert in Python?

In Python, the assert statement is used to continue the execute if the given condition evaluates to True. If the assert condition evaluates to False, then it raises the AssertionError exception with the specified error message.