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90 lines
2.2 KiB
Python
90 lines
2.2 KiB
Python
from __future__ import annotations
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from io import BytesIO
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from pathlib import Path
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from typing import IO
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import pytest
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from PIL import Hdf5StubImagePlugin, Image, ImageFile
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TEST_FILE = "Tests/images/hdf5.h5"
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def test_open() -> None:
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# Act
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with Image.open(TEST_FILE) as im:
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# Assert
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assert im.format == "HDF5"
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# Dummy data from the stub
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assert im.mode == "F"
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assert im.size == (1, 1)
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def test_invalid_file() -> None:
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# Arrange
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invalid_file = "Tests/images/flower.jpg"
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# Act / Assert
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with pytest.raises(SyntaxError):
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Hdf5StubImagePlugin.HDF5StubImageFile(invalid_file)
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def test_load() -> None:
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# Arrange
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with Image.open(TEST_FILE) as im:
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# Act / Assert: stub cannot load without an implemented handler
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with pytest.raises(OSError):
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im.load()
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def test_save() -> None:
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# Arrange
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with Image.open(TEST_FILE) as im:
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dummy_fp = BytesIO()
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dummy_filename = "dummy.filename"
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# Act / Assert: stub cannot save without an implemented handler
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with pytest.raises(OSError):
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im.save(dummy_filename)
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with pytest.raises(OSError):
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Hdf5StubImagePlugin._save(im, dummy_fp, dummy_filename)
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def test_handler(tmp_path: Path) -> None:
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class TestHandler(ImageFile.StubHandler):
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opened = False
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loaded = False
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saved = False
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def open(self, im: Image.Image) -> None:
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self.opened = True
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def load(self, im: ImageFile.ImageFile) -> Image.Image:
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self.loaded = True
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assert im.fp is not None
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im.fp.close()
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return Image.new("RGB", (1, 1))
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def is_loaded(self) -> bool:
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return self.loaded
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def save(self, im: Image.Image, fp: IO[bytes], filename: str) -> None:
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self.saved = True
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handler = TestHandler()
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Hdf5StubImagePlugin.register_handler(handler)
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with Image.open(TEST_FILE) as im:
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assert handler.opened
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assert not handler.is_loaded()
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im.load()
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assert handler.is_loaded()
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temp_file = str(tmp_path / "temp.h5")
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im.save(temp_file)
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assert handler.saved
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Hdf5StubImagePlugin._handler = None
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