twolfson

In some cases for Python unit tests, we want to automatically perform setUp methods in as declared in a base class. However, we still want setUp to work as per normal in the subclass. The following code will proxy the new setUp function to run it's base class' and the new one.

# Define a common test base for starting servers
class MyBaseTestCase(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        """On inherited classes, run our `setUp` method"""
        # Inspired via http://stackoverflow.com/questions/1323455/python-unit-test-with-base-and-sub-class/17696807#17696807
        if cls is not MyBaseTestCase and cls.setUp is not MyBaseTestCase.setUp:

olooney

'''
PIL's Image.thumbnail() returns an image that fits inside of a given size (preserving aspect ratios)
but the size of the actual image will vary and is certainly not guaranteed to be the requested size.
This is often inconvenient since the size of the returned thumbnail cannot be predicted. The django-thumbs
library solves this for square thumbnails by cropping the image to a square and then resizing it. However,
this only works for exact squares.

This function generalizes that approach to work for thumbnails of any aspect ratio. The returned thumbnail
is always exactly the requested size, and edges (left/right or top/bottom) are cropped off to adjust to
make sure the thumbnail will be the right size without distorting the image.