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96 lines
2.6 KiB
Python
96 lines
2.6 KiB
Python
import pickle
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import pytest
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from PIL import Image
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from .helper import skip_unless_feature
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def helper_pickle_file(
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tmp_path, pickle, protocol=0, test_file="Tests/images/hopper.jpg", mode=None
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):
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# Arrange
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with Image.open(test_file) as im:
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filename = str(tmp_path / "temp.pkl")
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if mode:
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im = im.convert(mode)
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# Act
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with open(filename, "wb") as f:
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pickle.dump(im, f, protocol)
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with open(filename, "rb") as f:
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loaded_im = pickle.load(f)
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# Assert
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assert im == loaded_im
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def helper_pickle_string(
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pickle, protocol=0, test_file="Tests/images/hopper.jpg", mode=None
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):
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with Image.open(test_file) as im:
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if mode:
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im = im.convert(mode)
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# Act
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dumped_string = pickle.dumps(im, protocol)
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loaded_im = pickle.loads(dumped_string)
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# Assert
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assert im == loaded_im
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@pytest.mark.parametrize(
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("test_file", "test_mode"),
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[
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("Tests/images/hopper.jpg", None),
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("Tests/images/hopper.jpg", "L"),
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("Tests/images/hopper.jpg", "PA"),
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pytest.param(
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"Tests/images/hopper.webp", None, marks=skip_unless_feature("webp")
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),
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("Tests/images/test-card.png", None),
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("Tests/images/zero_bb.png", None),
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("Tests/images/zero_bb_scale2.png", None),
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("Tests/images/non_zero_bb.png", None),
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("Tests/images/non_zero_bb_scale2.png", None),
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("Tests/images/p_trns_single.png", None),
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("Tests/images/pil123p.png", None),
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("Tests/images/itxt_chunks.png", None),
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],
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)
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def test_pickle_image(tmp_path, test_file, test_mode):
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# Act / Assert
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for protocol in range(0, pickle.HIGHEST_PROTOCOL + 1):
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helper_pickle_string(pickle, protocol, test_file, test_mode)
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helper_pickle_file(tmp_path, pickle, protocol, test_file, test_mode)
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def test_pickle_la_mode_with_palette(tmp_path):
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# Arrange
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filename = str(tmp_path / "temp.pkl")
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with Image.open("Tests/images/hopper.jpg") as im:
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im = im.convert("PA")
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# Act / Assert
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for protocol in range(0, pickle.HIGHEST_PROTOCOL + 1):
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im.mode = "LA"
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with open(filename, "wb") as f:
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pickle.dump(im, f, protocol)
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with open(filename, "rb") as f:
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loaded_im = pickle.load(f)
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im.mode = "PA"
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assert im == loaded_im
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def test_pickle_tell():
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# Arrange
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image = Image.open("Tests/images/hopper.webp")
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# Act: roundtrip
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unpickled_image = pickle.loads(pickle.dumps(image))
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# Assert
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assert unpickled_image.tell() == 0
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