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155 lines
4.3 KiB
Python
155 lines
4.3 KiB
Python
from __future__ import annotations
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import pickle
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from pathlib import Path
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import pytest
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from PIL import Image, ImageDraw, ImageFont
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from .helper import assert_image_equal, skip_unless_feature
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FONT_SIZE = 20
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FONT_PATH = "Tests/fonts/DejaVuSans/DejaVuSans.ttf"
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def helper_pickle_file(
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tmp_path: Path, protocol: int, test_file: str, mode: str | None
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) -> None:
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# Arrange
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im: Image.Image
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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(protocol: int, test_file: str, mode: str | None) -> None:
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im: Image.Image
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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/hopper.tif", None),
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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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@pytest.mark.parametrize("protocol", range(0, pickle.HIGHEST_PROTOCOL + 1))
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def test_pickle_image(
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tmp_path: Path, test_file: str, test_mode: str | None, protocol: int
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) -> None:
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# Act / Assert
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helper_pickle_string(protocol, test_file, test_mode)
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helper_pickle_file(tmp_path, protocol, test_file, test_mode)
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def test_pickle_la_mode_with_palette(tmp_path: Path) -> None:
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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 img:
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im = img.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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@skip_unless_feature("webp")
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def test_pickle_tell() -> None:
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# Arrange
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with Image.open("Tests/images/hopper.webp") as image:
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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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def helper_assert_pickled_font_images(
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font1: ImageFont.FreeTypeFont, font2: ImageFont.FreeTypeFont
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) -> None:
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# Arrange
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im1 = Image.new(mode="RGBA", size=(300, 100))
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im2 = Image.new(mode="RGBA", size=(300, 100))
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draw1 = ImageDraw.Draw(im1)
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draw2 = ImageDraw.Draw(im2)
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txt = "Hello World!"
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# Act
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draw1.text((10, 10), txt, font=font1)
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draw2.text((10, 10), txt, font=font2)
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# Assert
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assert_image_equal(im1, im2)
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@skip_unless_feature("freetype2")
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@pytest.mark.parametrize("protocol", list(range(0, pickle.HIGHEST_PROTOCOL + 1)))
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def test_pickle_font_string(protocol: int) -> None:
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# Arrange
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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# Act: roundtrip
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pickled_font = pickle.dumps(font, protocol)
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unpickled_font = pickle.loads(pickled_font)
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# Assert
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helper_assert_pickled_font_images(font, unpickled_font)
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@skip_unless_feature("freetype2")
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@pytest.mark.parametrize("protocol", list(range(0, pickle.HIGHEST_PROTOCOL + 1)))
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def test_pickle_font_file(tmp_path: Path, protocol: int) -> None:
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# Arrange
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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filename = str(tmp_path / "temp.pkl")
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# Act: roundtrip
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with open(filename, "wb") as f:
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pickle.dump(font, f, protocol)
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with open(filename, "rb") as f:
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unpickled_font = pickle.load(f)
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# Assert
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helper_assert_pickled_font_images(font, unpickled_font)
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