Pillow/Tests/test_image_copy.py

import copy

from PIL import Image

from .helper import hopper


def test_copy():
    cropped_coordinates = (10, 10, 20, 20)
    cropped_size = (10, 10)
    for mode in "1", "P", "L", "RGB", "I", "F":
        # Internal copy method
        im = hopper(mode)
        out = im.copy()
        assert out.mode == im.mode
        assert out.size == im.size

        # Python's copy method
        im = hopper(mode)
        out = copy.copy(im)
        assert out.mode == im.mode
        assert out.size == im.size

        # Internal copy method on a cropped image
        im = hopper(mode)
        out = im.crop(cropped_coordinates).copy()
        assert out.mode == im.mode
        assert out.size == cropped_size

        # Python's copy method on a cropped image
        im = hopper(mode)
        out = copy.copy(im.crop(cropped_coordinates))
        assert out.mode == im.mode
        assert out.size == cropped_size


def test_copy_zero():
    im = Image.new("RGB", (0, 0))
    out = im.copy()
    assert out.mode == im.mode
    assert out.size == im.size