Learn How to Auto-Grade

Auto-grading is a powerful tool that saves teachers time and provides students with feedback regarding the correctness of their solution before they submit it for a grade. 
All of this auto-grading magic can be accomplished with unit testing -- test whether parts (units) of a students code work properly by asserting that they meet certain conditions (equal to a predetermined value, produce a result in a given range, etc.).
Assertions and Unit Testing
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Python Examples
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Java Examples
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Ruby Examples
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Quick Start
New to Unit Testing?  Let's do a brief review. 
TODO
Python - unittest
 The basic building blocks of unit testing are test cases — single scenarios that must be set up and checked for correctness.
The simplest TestCase subclass will simply implement a test method (i.e. a method whose name starts with test) in order to perform specific testing code:
def test_default_case(self):
    # Your test case logic here (replace the example assertion below)
    # You may also rename this to any function in the form of 'test_your_test_name(self):'
    self.assertTrue(True)
Note that in order to test something, we use one of the assert*() methods provided by the TestCase base class. If the test fails, an exception will be raised with an explanatory message, and unittest will identify the test case as a failure. Any other exceptions will be treated as errors.
Tests can be numerous, and their set-up can be repetitive. Luckily, we can factor out set-up code by implementing a method called setUp(), which the testing framework will automatically call for every single test we run:
def setUp(self):
    # Setup code here (if required, replace the 'pass')
    pass
 Similarly, we can provide a tearDown() method that tidies up after the test method has been run:
def tearDown(self):
    # Teardown code here (if required, replace the 'pass')
    pass
 If setUp() succeeded, tearDown() will be run whether the test method succeeded or not.
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Java - JUnit
TODO
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@Test
public void testDefaultCase() {
    // You may rename this method to better suit the purpose of your test case
    // Your test case logic here
}
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@Before
public void setUp() {
    // Setup code here (if required)
}
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@After
public void tearDown() {
    // Teardown code here (if required)
}
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Created and curated by Joe Mazzone
​Joe Mazzone, former Computer and Software Engineering instructor at William M. Davies, Jr. Career and Technical High School in Lincoln, Rhode Island.
Joe is now a Senior Product Manager/Product Development Lead at John Wiley & Sons, Inc., working on Coding Rooms and zyBooks.
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Like what Joe created?  ☕ Buy him a coffee: https://www.buymeacoffee.com/JoeMazzone​
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Assertions and Unit Testing

Last modified 1mo ago