import unittest import pytest from PIL import Image, ImImagePlugin from .helper import PillowTestCase, assert_image_equal, hopper, is_pypy # sample im TEST_IM = "Tests/images/hopper.im" class TestFileIm(PillowTestCase): def test_sanity(self): with Image.open(TEST_IM) as im: im.load() self.assertEqual(im.mode, "RGB") self.assertEqual(im.size, (128, 128)) self.assertEqual(im.format, "IM") @unittest.skipIf(is_pypy(), "Requires CPython") def test_unclosed_file(self): def open(): im = Image.open(TEST_IM) im.load() pytest.warns(ResourceWarning, open) def test_closed_file(self): def open(): im = Image.open(TEST_IM) im.load() im.close() pytest.warns(None, open) def test_context_manager(self): def open(): with Image.open(TEST_IM) as im: im.load() pytest.warns(None, open) def test_tell(self): # Arrange with Image.open(TEST_IM) as im: # Act frame = im.tell() # Assert self.assertEqual(frame, 0) def test_n_frames(self): with Image.open(TEST_IM) as im: self.assertEqual(im.n_frames, 1) self.assertFalse(im.is_animated) def test_eoferror(self): with Image.open(TEST_IM) as im: n_frames = im.n_frames # Test seeking past the last frame self.assertRaises(EOFError, im.seek, n_frames) self.assertLess(im.tell(), n_frames) # Test that seeking to the last frame does not raise an error im.seek(n_frames - 1) def test_roundtrip(self): for mode in ["RGB", "P", "PA"]: out = self.tempfile("temp.im") im = hopper(mode) im.save(out) with Image.open(out) as reread: assert_image_equal(reread, im) def test_save_unsupported_mode(self): out = self.tempfile("temp.im") im = hopper("HSV") self.assertRaises(ValueError, im.save, out) def test_invalid_file(self): invalid_file = "Tests/images/flower.jpg" self.assertRaises(SyntaxError, ImImagePlugin.ImImageFile, invalid_file) def test_number(self): self.assertEqual(1.2, ImImagePlugin.number("1.2"))