Pillow/Tests/test_image_getextrema.py

from PIL import Image

from .helper import PillowTestCase, hopper


class TestImageGetExtrema(PillowTestCase):
    def test_extrema(self):
        def extrema(mode):
            return hopper(mode).getextrema()

        self.assertEqual(extrema("1"), (0, 255))
        self.assertEqual(extrema("L"), (0, 255))
        self.assertEqual(extrema("I"), (0, 255))
        self.assertEqual(extrema("F"), (0, 255))
        self.assertEqual(extrema("P"), (0, 225))  # fixed palette
        self.assertEqual(extrema("RGB"), ((0, 255), (0, 255), (0, 255)))
        self.assertEqual(extrema("RGBA"), ((0, 255), (0, 255), (0, 255), (255, 255)))
        self.assertEqual(extrema("CMYK"), ((0, 255), (0, 255), (0, 255), (0, 0)))
        self.assertEqual(extrema("I;16"), (0, 255))

    def test_true_16(self):
        with Image.open("Tests/images/16_bit_noise.tif") as im:
            self.assertEqual(im.mode, "I;16")
            extrema = im.getextrema()
        self.assertEqual(extrema, (106, 285))
Give correct extrema for I;16 format images Currently gives None for a 16 bit greyscale image rather than the true min and max values in the 0-65536 range. The internal ImagingGetProjection function already supports I;16 but the _getextrema needs to know to unpack the result. 2018-09-17 18:30:42 +03:00			`from PIL import Image`
Introduce isort to automate import ordering and formatting Similar to the recent adoption of Black. isort is a Python utility to sort imports alphabetically and automatically separate into sections. By using isort, contributors can quickly and automatically conform to the projects style without thinking. Just let the tool do it. Uses the configuration recommended by the Black to avoid conflicts of style. Rewrite TestImageQt.test_deprecated to no rely on import order. 2019-07-06 23:40:53 +03:00
Remove unnecessary unittest.main() boilerplate from test files With the introduction and use of pytest, it is simple and easy to execute specific tests in isolation through documented command line arguments. Either by specifying the module path or through the `-k EXPRESSION` argument. There is no longer any need to provide the boilerplate: if __name__ == '__main__': unittest.main() To every test file. It is simply noise. The pattern remains in test files that aren't named with `test_*` as those files are not discovered and executed by pytest by default. 2019-02-03 18:34:53 +03:00			`from .helper import PillowTestCase, hopper`
py3k: Import Christoph Gohlke's test suite This is Christoph Gohlke's test suite from his personal PIL package found at http://www.lfd.uci.edu/~gohlke/pythonlibs/. This is just to bring it in as a separate commit. Future commits will align it with Pillow. 2012-10-16 00:26:38 +04:00

Convert old tests to use unittest 2014-06-10 13:10:47 +04:00			`class TestImageGetExtrema(PillowTestCase):`
			`def test_extrema(self):`
			`def extrema(mode):`
Replace some lena() with hopper(), and temporarily disable fail-fast so we can see all failures 2014-09-05 14:03:56 +04:00			`return hopper(mode).getextrema()`
Convert old tests to use unittest 2014-06-10 13:10:47 +04:00
			`self.assertEqual(extrema("1"), (0, 255))`
Fix tests. test_trns_p() needed assert_image_similar() in place of assert_image_equal() 2014-09-14 21:00:13 +04:00			`self.assertEqual(extrema("L"), (0, 255))`
Revert "Merge pull request #3838 from radarhere/i_conversion" This reverts commit 41f3e7c8bd2d29f661c70d1696e7b0b69f4c0174, reversing changes made to 2f84482871e44e41ae0f0a439534102495af70f2. 2019-06-11 12:28:31 +03:00			`self.assertEqual(extrema("I"), (0, 255))`
Fix tests. test_trns_p() needed assert_image_similar() in place of assert_image_equal() 2014-09-14 21:00:13 +04:00			`self.assertEqual(extrema("F"), (0, 255))`
			`self.assertEqual(extrema("P"), (0, 225)) # fixed palette`
Format with Black 2019-06-13 18:54:24 +03:00			`self.assertEqual(extrema("RGB"), ((0, 255), (0, 255), (0, 255)))`
			`self.assertEqual(extrema("RGBA"), ((0, 255), (0, 255), (0, 255), (255, 255)))`
			`self.assertEqual(extrema("CMYK"), ((0, 255), (0, 255), (0, 255), (0, 0)))`
Revert "Merge pull request #3838 from radarhere/i_conversion" This reverts commit 41f3e7c8bd2d29f661c70d1696e7b0b69f4c0174, reversing changes made to 2f84482871e44e41ae0f0a439534102495af70f2. 2019-06-11 12:28:31 +03:00			`self.assertEqual(extrema("I;16"), (0, 255))`
Give correct extrema for I;16 format images Currently gives None for a 16 bit greyscale image rather than the true min and max values in the 0-65536 range. The internal ImagingGetProjection function already supports I;16 but the _getextrema needs to know to unpack the result. 2018-09-17 18:30:42 +03:00
			`def test_true_16(self):`
Use context managers 2019-11-25 23:03:23 +03:00			`with Image.open("Tests/images/16_bit_noise.tif") as im:`
			`self.assertEqual(im.mode, "I;16")`
			`extrema = im.getextrema()`
Give correct extrema for I;16 format images Currently gives None for a 16 bit greyscale image rather than the true min and max values in the 0-65536 range. The internal ImagingGetProjection function already supports I;16 but the _getextrema needs to know to unpack the result. 2018-09-17 18:30:42 +03:00			`self.assertEqual(extrema, (106, 285))`