Experimental Features

Decorator for asserts

Often you just want to write simple test cases using assert statements. Asserts have the advantage that they are quick and easy to write. One disadvantage is that when one of many asserts fails, the other tests will not be executed.

For this we created a simple decorator. Here is an example:

A student answer

# Student answer
my_answer_a = 4
my_answer_b = 18.3

And the test code

Testing using a decorator

from e2xgradingtools.decorators import test_asserts

@test_asserts(5) # The argument is the number of points this test is worth
def my_test():
    assert my_answer_a == 5, "Wrong value for my_answer_a"
    assert my_answer_b == 18.3, "Wrong value for my_answer_b"

my_test()

This will output:

!--> AssertionError: Wrong value for my_answer_a
     Line 2: assert my_answer_a == 5, "Wrong value for my_answer_a"

1 / 2 tests passed

### BEGIN GRADE
2.5
### END GRADE

Warning

When using the test_asserts decorator, it will count the number of asserts in the decorated function first. For this assert statements in loops are only counted once. Please only use this decorator if you are sure what you are doing.