Pillow

1
from __future__ import annotations
2

3
import pytest
4

5
from PIL import Image, XVThumbImagePlugin
6

7
from .helper import assert_image_similar, hopper
8

9
TEST_FILE = "Tests/images/hopper.p7"
10

11

12
def test_open() -> None:
13
    # Act
14
    with Image.open(TEST_FILE) as im:
15
        # Assert
16
        assert im.format == "XVThumb"
17

18
        # Create a Hopper image with a similar XV palette
19
        im_hopper = hopper().quantize(palette=im)
20
        assert_image_similar(im, im_hopper, 9)
21

22

23
def test_unexpected_eof() -> None:
24
    # Test unexpected EOF reading XV thumbnail file
25
    # Arrange
26
    bad_file = "Tests/images/hopper_bad.p7"
27

28
    # Act / Assert
29
    with pytest.raises(SyntaxError):
30
        XVThumbImagePlugin.XVThumbImageFile(bad_file)
31

32

33
def test_invalid_file() -> None:
34
    # Arrange
35
    invalid_file = "Tests/images/flower.jpg"
36

37
    # Act / Assert
38
    with pytest.raises(SyntaxError):
39
        XVThumbImagePlugin.XVThumbImageFile(invalid_file)
40