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"), (150, 65280))
        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"), (150, 65280))

    def test_true_16(self):
        im = Image.open("Tests/images/16_bit_noise.tif")
        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`
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):`
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			`def test_extrema(self):`
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			`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))`
Improved I mode conversion 2019-05-08 14:58:33 +03:00			`self.assertEqual(extrema("I"), (150, 65280))`
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`
Convert old tests to use unittest 2014-06-10 13:10:47 +04:00			`self.assertEqual(`
Fix tests. test_trns_p() needed assert_image_similar() in place of assert_image_equal() 2014-09-14 21:00:13 +04:00			`extrema("RGB"), ((0, 255), (0, 255), (0, 255)))`
Convert old tests to use unittest 2014-06-10 13:10:47 +04:00			`self.assertEqual(`
Fix tests. test_trns_p() needed assert_image_similar() in place of assert_image_equal() 2014-09-14 21:00:13 +04:00			`extrema("RGBA"), ((0, 255), (0, 255), (0, 255), (255, 255)))`
Convert old tests to use unittest 2014-06-10 13:10:47 +04:00			`self.assertEqual(`
Remove redundant parentheses 2018-10-02 11:55:28 +03:00			`extrema("CMYK"), ((0, 255), (0, 255), (0, 255), (0, 0)))`
Improved I mode conversion 2019-05-08 14:58:33 +03:00			`self.assertEqual(extrema("I;16"), (150, 65280))`
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):`
			`im = Image.open("Tests/images/16_bit_noise.tif")`
			`self.assertEqual(im.mode, 'I;16')`
			`extrema = im.getextrema()`
			`self.assertEqual(extrema, (106, 285))`