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78 lines
2.4 KiB
Python
78 lines
2.4 KiB
Python
import pytest
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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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assert im.mode == "RGB"
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assert im.size == (128, 128)
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assert im.format, "PPM"
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assert 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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assert im.mode == "I"
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assert im.size == (20, 100)
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assert 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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with pytest.raises(ValueError):
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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 pytest.raises(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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assert 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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assert im.get_format_mimetype() == "image/x-portable-anymap"
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