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