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76 lines
2.5 KiB
Python
76 lines
2.5 KiB
Python
from PIL import Image
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from .helper import PillowTestCase, assert_image_equal, assert_image_similar, hopper
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# sample ppm stream
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test_file = "Tests/images/hopper.ppm"
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class TestFilePpm(PillowTestCase):
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def test_sanity(self):
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with Image.open(test_file) as im:
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im.load()
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self.assertEqual(im.mode, "RGB")
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self.assertEqual(im.size, (128, 128))
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self.assertEqual(im.format, "PPM")
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self.assertEqual(im.get_format_mimetype(), "image/x-portable-pixmap")
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def test_16bit_pgm(self):
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with Image.open("Tests/images/16_bit_binary.pgm") as im:
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im.load()
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self.assertEqual(im.mode, "I")
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self.assertEqual(im.size, (20, 100))
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self.assertEqual(im.get_format_mimetype(), "image/x-portable-graymap")
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with Image.open("Tests/images/16_bit_binary_pgm.png") as tgt:
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assert_image_equal(im, tgt)
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def test_16bit_pgm_write(self):
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with Image.open("Tests/images/16_bit_binary.pgm") as im:
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im.load()
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f = self.tempfile("temp.pgm")
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im.save(f, "PPM")
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with Image.open(f) as reloaded:
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assert_image_equal(im, reloaded)
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def test_pnm(self):
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with Image.open("Tests/images/hopper.pnm") as im:
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assert_image_similar(im, hopper(), 0.0001)
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f = self.tempfile("temp.pnm")
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im.save(f)
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with Image.open(f) as reloaded:
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assert_image_equal(im, reloaded)
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def test_truncated_file(self):
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path = self.tempfile("temp.pgm")
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with open(path, "w") as f:
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f.write("P6")
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self.assertRaises(ValueError, Image.open, path)
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def test_neg_ppm(self):
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# Storage.c accepted negative values for xsize, ysize. the
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# internal open_ppm function didn't check for sanity but it
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# has been removed. The default opener doesn't accept negative
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# sizes.
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with self.assertRaises(IOError):
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Image.open("Tests/images/negative_size.ppm")
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def test_mimetypes(self):
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path = self.tempfile("temp.pgm")
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with open(path, "w") as f:
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f.write("P4\n128 128\n255")
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with Image.open(path) as im:
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self.assertEqual(im.get_format_mimetype(), "image/x-portable-bitmap")
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with open(path, "w") as f:
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f.write("PyCMYK\n128 128\n255")
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with Image.open(path) as im:
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self.assertEqual(im.get_format_mimetype(), "image/x-portable-anymap")
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