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Utilities for unit testing with images.

Project description


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pyimagetest provides utilities for unit testing with images.

pyimagetest.ImageTestcase is an ABC meant for double inheritance with unittest.Testcase. It adds the assertImagesAlmostEqual method. The compared image objects do not have to be from the same pyimagetest.ImageBackend. As long as the backend is known to pyimagetest.ImageTestcase it is inferred automatically.

Currently the following ImageBackends are supported off-the-shelf:

  • imageio
  • PIL

Custom backends can be added by subclassing ImageBackend.

Example usage

import unittest
import pyimagetest

class Tester(pyimagetest.ImageTestcase, unittest.TestCase):
    def default_test_image_file(self):
        return "path/to/default/test/image/file"

    def test_io(self):
        imageio_image = self.load_image("imageio")
        pil_image = self.load_image("PIL")
        self.assertImagesAlmostEqual(imageio_image, pil_image)

if __name__ == "__main__":

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