Pillow/Tests/test_file_dds.py
2018-03-04 21:36:33 +11:00

117 lines
3.1 KiB
Python

from io import BytesIO
from helper import unittest, PillowTestCase
from PIL import Image, DdsImagePlugin
TEST_FILE_DXT1 = "Tests/images/dxt1-rgb-4bbp-noalpha_MipMaps-1.dds"
TEST_FILE_DXT3 = "Tests/images/dxt3-argb-8bbp-explicitalpha_MipMaps-1.dds"
TEST_FILE_DXT5 = "Tests/images/dxt5-argb-8bbp-interpolatedalpha_MipMaps-1.dds"
TEST_FILE_DX10_BC7 = "Tests/images/bc7-argb-8bpp_MipMaps-1.dds"
class TestFileDds(PillowTestCase):
"""Test DdsImagePlugin"""
def test_sanity_dxt1(self):
"""Check DXT1 images can be opened"""
target = Image.open(TEST_FILE_DXT1.replace('.dds', '.png'))
im = Image.open(TEST_FILE_DXT1)
im.load()
self.assertEqual(im.format, "DDS")
self.assertEqual(im.mode, "RGBA")
self.assertEqual(im.size, (256, 256))
self.assert_image_equal(target.convert('RGBA'), im)
def test_sanity_dxt5(self):
"""Check DXT5 images can be opened"""
target = Image.open(TEST_FILE_DXT5.replace('.dds', '.png'))
im = Image.open(TEST_FILE_DXT5)
im.load()
self.assertEqual(im.format, "DDS")
self.assertEqual(im.mode, "RGBA")
self.assertEqual(im.size, (256, 256))
self.assert_image_equal(target, im)
def test_sanity_dxt3(self):
"""Check DXT3 images can be opened"""
target = Image.open(TEST_FILE_DXT3.replace('.dds', '.png'))
im = Image.open(TEST_FILE_DXT3)
im.load()
self.assertEqual(im.format, "DDS")
self.assertEqual(im.mode, "RGBA")
self.assertEqual(im.size, (256, 256))
self.assert_image_equal(target, im)
def test_dx10_bc7(self):
"""Check DX10 images can be opened"""
target = Image.open(TEST_FILE_DX10_BC7.replace('.dds', '.png'))
im = Image.open(TEST_FILE_DX10_BC7)
im.load()
self.assertEqual(im.format, "DDS")
self.assertEqual(im.mode, "RGBA")
self.assertEqual(im.size, (256, 256))
self.assert_image_equal(target, im)
def test__validate_true(self):
"""Check valid prefix"""
# Arrange
prefix = b"DDS etc"
# Act
output = DdsImagePlugin._validate(prefix)
# Assert
self.assertTrue(output)
def test__validate_false(self):
"""Check invalid prefix"""
# Arrange
prefix = b"something invalid"
# Act
output = DdsImagePlugin._validate(prefix)
# Assert
self.assertFalse(output)
def test_short_header(self):
""" Check a short header"""
with open(TEST_FILE_DXT5, 'rb') as f:
img_file = f.read()
def short_header():
Image.open(BytesIO(img_file[:119]))
self.assertRaises(IOError, short_header)
def test_short_file(self):
""" Check that the appropriate error is thrown for a short file"""
with open(TEST_FILE_DXT5, 'rb') as f:
img_file = f.read()
def short_file():
im = Image.open(BytesIO(img_file[:-100]))
im.load()
self.assertRaises(IOError, short_file)
if __name__ == '__main__':
unittest.main()