from .helper import PillowTestCase

from PIL import GdImageFile

TEST_GD_FILE = "Tests/images/hopper.gd"


class TestFileGd(PillowTestCase):

    def test_sanity(self):
        im = GdImageFile.open(TEST_GD_FILE)
        self.assertEqual(im.size, (128, 128))
        self.assertEqual(im.format, "GD")

    def test_bad_mode(self):
        self.assertRaises(ValueError,
                          GdImageFile.open, TEST_GD_FILE, 'bad mode')

    def test_invalid_file(self):
        invalid_file = "Tests/images/flower.jpg"

        self.assertRaises(IOError, GdImageFile.open, invalid_file)