Pillow/Tests/test_file_webp_lossless.py

from PIL import Image

from .helper import PillowTestCase, hopper

try:
    from PIL import _webp

    HAVE_WEBP = True
except ImportError:
    HAVE_WEBP = False


class TestFileWebpLossless(PillowTestCase):
    def setUp(self):
        if not HAVE_WEBP:
            self.skipTest("WebP support not installed")
            return

        if _webp.WebPDecoderVersion() < 0x0200:
            self.skipTest("lossless not included")

        self.rgb_mode = "RGB"

    def test_write_lossless_rgb(self):
        temp_file = self.tempfile("temp.webp")

        hopper(self.rgb_mode).save(temp_file, lossless=True)

        image = Image.open(temp_file)
        image.load()

        self.assertEqual(image.mode, self.rgb_mode)
        self.assertEqual(image.size, (128, 128))
        self.assertEqual(image.format, "WEBP")
        image.load()
        image.getdata()

        self.assert_image_equal(image, hopper(self.rgb_mode))