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574 lines
19 KiB
Python
574 lines
19 KiB
Python
3 years ago
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import json
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import os
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from pathlib import Path
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import shutil
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import subprocess
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import warnings
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from PIL import Image, ImageChops
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import pytest
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from pelican.plugins.image_process import (
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ExifTool,
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compute_paths,
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harvest_images_in_fragment,
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is_img_identifiable,
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process_image,
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)
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# Prepare test image constants.
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HERE = Path(__file__).resolve().parent
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TEST_DATA = HERE.joinpath("test_data").resolve()
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TEST_IMAGES = [
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TEST_DATA.joinpath(f"pelican-bird.{ext}").resolve() for ext in ["jpg", "png"]
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]
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EXIF_TEST_IMAGES = [
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TEST_DATA.joinpath("exif", f"pelican-bird.{ext}").resolve()
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for ext in ["jpg", "png"]
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]
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TRANSFORM_RESULTS = TEST_DATA.joinpath("results").resolve()
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# Register all supported transforms.
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SINGLE_TRANSFORMS = {
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"crop": ["crop 10 20 100 200"],
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"flip_horizontal": ["flip_horizontal"],
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"flip_vertical": ["flip_vertical"],
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"grayscale": ["grayscale"],
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"resize": ["resize 200 250"],
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"rotate": ["rotate 20"],
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"scale_in": ["scale_in 200 250 False"],
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"scale_out": ["scale_out 200 250 False"],
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"blur": ["blur"],
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"contour": ["contour"],
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"detail": ["detail"],
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"edge_enhance": ["edge_enhance"],
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"edge_enhance_more": ["edge_enhance_more"],
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"emboss": ["emboss"],
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"find_edges": ["find_edges"],
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"smooth": ["smooth"],
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"smooth_more": ["smooth_more"],
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"sharpen": ["sharpen"],
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}
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def get_settings(**kwargs):
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"""Provide tweaked setting dictionaries for testing
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Set keyword arguments to override specific settings.
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"""
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DEFAULT_CONFIG = {
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"PATH": HERE,
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"OUTPUT_PATH": "output",
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"static_content": {},
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"filenames": {},
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"SITEURL": "//",
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"IMAGE_PROCESS": SINGLE_TRANSFORMS,
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}
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settings = DEFAULT_CONFIG.copy()
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settings.update(kwargs)
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return settings
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def test_undefined_transform():
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settings = get_settings()
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tag = "<img class='image-process-undefined' src='/tmp/test.jpg' />"
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with pytest.raises(RuntimeError):
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harvest_images_in_fragment(tag, settings)
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@pytest.mark.parametrize("transform_id, transform_params", SINGLE_TRANSFORMS.items())
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@pytest.mark.parametrize("image_path", TEST_IMAGES)
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def test_all_transforms(tmp_path, transform_id, transform_params, image_path):
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"""Test the raw transform and their results on images."""
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settings = get_settings()
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image_name = image_path.name
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destination_path = tmp_path.joinpath(transform_id, image_name)
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expected_path = TRANSFORM_RESULTS.joinpath(transform_id, image_name)
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process_image((str(image_path), str(destination_path), transform_params), settings)
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transformed = Image.open(destination_path)
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expected = Image.open(expected_path)
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# Image.getbbox() returns None if there are only black pixels in the image:
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image_diff = ImageChops.difference(transformed, expected).getbbox()
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assert image_diff is None
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@pytest.mark.parametrize(
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"orig_src, orig_img, new_src, new_img",
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[
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(
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"/tmp/test.jpg",
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"tmp/test.jpg",
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"/tmp/derivatives/crop/test.jpg",
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"tmp/derivatives/crop/test.jpg",
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),
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(
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"../tmp/test.jpg",
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"../tmp/test.jpg",
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"../tmp/derivatives/crop/test.jpg",
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"../tmp/derivatives/crop/test.jpg",
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),
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(
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"http://xxx/tmp/test.jpg",
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"tmp/test.jpg",
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"http://xxx/tmp/derivatives/crop/test.jpg",
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"tmp/derivatives/crop/test.jpg",
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),
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],
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)
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def test_path_normalization(mocker, orig_src, orig_img, new_src, new_img):
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# Allow non-existing images to be processed:
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mocker.patch(
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"pelican.plugins.image_process.image_process.is_img_identifiable",
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lambda img_filepath: True,
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)
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# Silence image transforms.
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process = mocker.patch("pelican.plugins.image_process.image_process.process_image")
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settings = get_settings(IMAGE_PROCESS_DIR="derivatives")
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img_tag_orig = (
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'<img class="test image-process image-process-crop test2" '
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f'src="{orig_src}"/>'
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)
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img_tag_processed = harvest_images_in_fragment(img_tag_orig, settings)
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assert img_tag_processed == (
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f'<img class="test image-process image-process-crop test2" src="{new_src}"/>'
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)
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process.assert_called_once_with(
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(
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os.path.join(settings["PATH"], orig_img),
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os.path.join(settings["OUTPUT_PATH"], new_img),
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SINGLE_TRANSFORMS["crop"],
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),
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settings,
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)
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COMPLEX_TRANSFORMS = {
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"thumb": ["crop 0 0 50% 50%", "scale_out 150 150", "crop 0 0 150 150"],
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"article-image": {"type": "image", "ops": ["scale_in 300 300"]},
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"crisp": {
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"type": "responsive-image",
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"srcset": [
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("1x", ["scale_in 800 600 True"]),
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("2x", ["scale_in 1600 1200 True"]),
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("4x", ["scale_in 3200 2400 True"]),
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],
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"default": "1x",
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},
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"crisp2": {
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"type": "responsive-image",
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"srcset": [
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("1x", ["scale_in 800 600 True"]),
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("2x", ["scale_in 1600 1200 True"]),
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("4x", ["scale_in 3200 2400 True"]),
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],
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"default": ["scale_in 400 300 True"],
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},
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"large-photo": {
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"type": "responsive-image",
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"sizes": (
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"(min-width: 1200px) 800px, "
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"(min-width: 992px) 650px, "
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"(min-width: 768px) 718px, "
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"100vw"
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),
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"srcset": [
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("600w", ["scale_in 600 450 True"]),
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("800w", ["scale_in 800 600 True"]),
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("1600w", ["scale_in 1600 1200 True"]),
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],
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"default": "800w",
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},
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"pict": {
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"type": "picture",
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"sources": [
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{
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"name": "default",
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"media": "(min-width: 640px)",
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"srcset": [
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("640w", ["scale_in 640 480 True"]),
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("1024w", ["scale_in 1024 683 True"]),
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("1600w", ["scale_in 1600 1200 True"]),
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],
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"sizes": "100vw",
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},
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{
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"name": "source-1",
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"srcset": [
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("1x", ["crop 100 100 200 200"]),
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("2x", ["crop 100 100 300 300"]),
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],
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},
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],
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"default": ("default", "640w"),
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},
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"pict2": {
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"type": "picture",
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"sources": [
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{
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"name": "default",
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"media": "(min-width: 640px)",
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"srcset": [
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("640w", ["scale_in 640 480 True"]),
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("1024w", ["scale_in 1024 683 True"]),
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("1600w", ["scale_in 1600 1200 True"]),
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],
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"sizes": "100vw",
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},
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{
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"name": "source-2",
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"srcset": [
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("1x", ["crop 100 100 200 200"]),
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("2x", ["crop 100 100 300 300"]),
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],
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},
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],
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"default": ("source-2", ["scale_in 800 600 True"]),
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},
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}
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@pytest.mark.parametrize(
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"orig_tag, new_tag, call_args",
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[
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(
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'<img class="image-process-thumb" src="/tmp/test.jpg" />',
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'<img class="image-process-thumb" src="/tmp/derivs/thumb/test.jpg"/>',
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[
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(
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"tmp/test.jpg",
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"tmp/derivs/thumb/test.jpg",
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["crop 0 0 50% 50%", "scale_out 150 150", "crop 0 0 150 150"],
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),
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],
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),
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(
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'<img class="image-process-article-image" src="/tmp/test.jpg" />',
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'<img class="image-process-article-image" '
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'src="/tmp/derivs/article-image/test.jpg"/>',
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[
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(
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"tmp/test.jpg",
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"tmp/derivs/article-image/test.jpg",
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["scale_in 300 300"],
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),
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],
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),
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(
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'<img class="image-process-crisp" src="/tmp/test.jpg" />',
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'<img class="image-process-crisp" src="/tmp/derivs/crisp/1x/test.jpg" '
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'srcset="/tmp/derivs/crisp/1x/test.jpg 1x, '
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"/tmp/derivs/crisp/2x/test.jpg 2x, "
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'/tmp/derivs/crisp/4x/test.jpg 4x"/>',
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[
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(
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"tmp/test.jpg",
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"tmp/derivs/crisp/1x/test.jpg",
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["scale_in 800 600 True"],
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),
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(
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"tmp/test.jpg",
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"tmp/derivs/crisp/2x/test.jpg",
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["scale_in 1600 1200 True"],
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),
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(
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"tmp/test.jpg",
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"tmp/derivs/crisp/4x/test.jpg",
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["scale_in 3200 2400 True"],
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),
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],
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),
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(
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'<img class="image-process-crisp2" src="/tmp/test.jpg" />',
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'<img class="image-process-crisp2" '
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'src="/tmp/derivs/crisp2/default/test.jpg" '
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'srcset="/tmp/derivs/crisp2/1x/test.jpg 1x, '
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"/tmp/derivs/crisp2/2x/test.jpg 2x, "
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'/tmp/derivs/crisp2/4x/test.jpg 4x"/>',
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# default must be first, because the process execute it first
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[
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(
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"tmp/test.jpg",
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"tmp/derivs/crisp2/default/test.jpg",
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["scale_in 400 300 True"],
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),
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(
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"tmp/test.jpg",
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"tmp/derivs/crisp2/1x/test.jpg",
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["scale_in 800 600 True"],
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),
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(
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"tmp/test.jpg",
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"tmp/derivs/crisp2/2x/test.jpg",
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["scale_in 1600 1200 True"],
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),
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(
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"tmp/test.jpg",
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"tmp/derivs/crisp2/4x/test.jpg",
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["scale_in 3200 2400 True"],
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),
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],
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),
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(
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'<img class="image-process-large-photo" src="/tmp/test.jpg" />',
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'<img class="image-process-large-photo" '
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'sizes="(min-width: 1200px) 800px, (min-width: 992px) 650px, '
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'(min-width: 768px) 718px, 100vw" src="/tmp/derivs/large-photo/'
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'800w/test.jpg" '
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'srcset="/tmp/derivs/large-photo/600w/test.jpg 600w, '
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"/tmp/derivs/large-photo/800w/test.jpg 800w, "
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'/tmp/derivs/large-photo/1600w/test.jpg 1600w"/>',
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[
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|
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(
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"tmp/test.jpg",
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"tmp/derivs/large-photo/600w/test.jpg",
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["scale_in 600 450 True"],
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),
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|
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(
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"tmp/test.jpg",
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"tmp/derivs/large-photo/800w/test.jpg",
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["scale_in 800 600 True"],
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),
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|
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(
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"tmp/test.jpg",
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"tmp/derivs/large-photo/1600w/test.jpg",
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["scale_in 1600 1200 True"],
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),
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],
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),
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(
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'<picture><source class="source-1" '
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'src="/images/pelican-closeup.jpg"/><img '
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'class="image-process-pict" src="/images/pelican.jpg"/>'
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"</picture>",
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'<picture><source media="(min-width: 640px)" sizes="100vw" '
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'srcset="/images/derivs/pict/default/640w/pelican.jpg 640w, '
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"/images/derivs/pict/default/1024w/pelican.jpg 1024w, "
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'/images/derivs/pict/default/1600w/pelican.jpg 1600w"/>'
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'<source srcset="/images/derivs/pict/source-1/1x/'
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"pelican-closeup.jpg 1x, /images/derivs/pict/source-1/2x/"
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|
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'pelican-closeup.jpg 2x"/><img '
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'class="image-process-pict" '
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'src="/images/derivs/pict/default/640w/pelican.jpg"/>'
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"</picture>",
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[
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|
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(
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"images/pelican.jpg",
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"images/derivs/pict/default/640w/pelican.jpg",
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|
|
["scale_in 640 480 True"],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"images/pelican.jpg",
|
||
|
|
"images/derivs/pict/default/1024w/pelican.jpg",
|
||
|
|
["scale_in 1024 683 True"],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"images/pelican.jpg",
|
||
|
|
"images/derivs/pict/default/1600w/pelican.jpg",
|
||
|
|
["scale_in 1600 1200 True"],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"images/pelican-closeup.jpg",
|
||
|
|
"images/derivs/pict/source-1/1x/pelican-closeup.jpg",
|
||
|
|
["crop 100 100 200 200"],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"images/pelican-closeup.jpg",
|
||
|
|
"images/derivs/pict/source-1/2x/pelican-closeup.jpg",
|
||
|
|
["crop 100 100 300 300"],
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
'<div class="figure"><img alt="Pelican" class="image-process'
|
||
|
|
'-pict2" src="/images/pelican.jpg" /> <p class="caption">'
|
||
|
|
'A nice pelican</p> <div class="legend"> <img alt="Other view of '
|
||
|
|
'pelican" class="image-process source-2" src="/images/'
|
||
|
|
'pelican-closeup.jpg" /></div></div>',
|
||
|
|
'<div class="figure"><picture><source media="(min-width: 640px)" '
|
||
|
|
'sizes="100vw" srcset="/images/derivs/pict2/default/640w/pelican'
|
||
|
|
".jpg 640w, /images/derivs/pict2/default/1024w/pelican.jpg 1024w,"
|
||
|
|
' /images/derivs/pict2/default/1600w/pelican.jpg 1600w"/>'
|
||
|
|
'<source srcset="/images/derivs/pict2/source-2/1x/pelican-closeup'
|
||
|
|
".jpg 1x, /images/derivs/pict2/source-2/2x/pelican-closeup.jpg "
|
||
|
|
'2x"/><img alt="Pelican" class="image-process-pict2" '
|
||
|
|
'src="/images/derivs/pict2/source-2/default/pelican-closeup.jpg"'
|
||
|
|
'/></picture> <p class="caption">A nice pelican</p> <div '
|
||
|
|
'class="legend"> </div></div>',
|
||
|
|
[
|
||
|
|
# Default calls first.
|
||
|
|
(
|
||
|
|
"images/pelican-closeup.jpg",
|
||
|
|
"images/derivs/pict2/source-2/default/pelican-closeup.jpg",
|
||
|
|
["scale_in 800 600 True"],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"images/pelican.jpg",
|
||
|
|
"images/derivs/pict2/default/640w/pelican.jpg",
|
||
|
|
["scale_in 640 480 True"],
|
||
|
|
),
|
||
|
|
# Then images in processing order.
|
||
|
|
(
|
||
|
|
"images/pelican.jpg",
|
||
|
|
"images/derivs/pict2/default/1024w/pelican.jpg",
|
||
|
|
["scale_in 1024 683 True"],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"images/pelican.jpg",
|
||
|
|
"images/derivs/pict2/default/1600w/pelican.jpg",
|
||
|
|
["scale_in 1600 1200 True"],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"images/pelican-closeup.jpg",
|
||
|
|
"images/derivs/pict2/source-2/1x/pelican-closeup.jpg",
|
||
|
|
["crop 100 100 200 200"],
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"images/pelican-closeup.jpg",
|
||
|
|
"images/derivs/pict2/source-2/2x/pelican-closeup.jpg",
|
||
|
|
["crop 100 100 300 300"],
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
],
|
||
|
|
)
|
||
|
|
def test_picture_generation(mocker, orig_tag, new_tag, call_args):
|
||
|
|
# Allow non-existing images to be processed:
|
||
|
|
mocker.patch(
|
||
|
|
"pelican.plugins.image_process.image_process.is_img_identifiable",
|
||
|
|
lambda img_filepath: True,
|
||
|
|
)
|
||
|
|
process = mocker.patch("pelican.plugins.image_process.image_process.process_image")
|
||
|
|
|
||
|
|
settings = get_settings(
|
||
|
|
IMAGE_PROCESS=COMPLEX_TRANSFORMS, IMAGE_PROCESS_DIR="derivs"
|
||
|
|
)
|
||
|
|
|
||
|
|
assert harvest_images_in_fragment(orig_tag, settings) == new_tag
|
||
|
|
|
||
|
|
for i, (orig_img, new_img, transform_params) in enumerate(call_args):
|
||
|
|
assert process.mock_calls[i] == mocker.call(
|
||
|
|
(
|
||
|
|
os.path.join(settings["PATH"], orig_img),
|
||
|
|
os.path.join(settings["OUTPUT_PATH"], new_img),
|
||
|
|
transform_params,
|
||
|
|
),
|
||
|
|
settings,
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def process_image_mock_exif_tool_started(image, settings):
|
||
|
|
assert ExifTool._instance is not None
|
||
|
|
|
||
|
|
|
||
|
|
def process_image_mock_exif_tool_not_started(image, settings):
|
||
|
|
assert ExifTool._instance is None
|
||
|
|
|
||
|
|
|
||
|
|
@pytest.mark.parametrize("copy_tags", [True, False])
|
||
|
|
def test_exiftool_process_is_started_only_when_necessary(mocker, copy_tags):
|
||
|
|
if shutil.which("exiftool") is None:
|
||
|
|
warnings.warn(
|
||
|
|
"EXIF tags copying will not be tested because the exiftool program could "
|
||
|
|
"not be found. Please install exiftool and make sure it is in your path."
|
||
|
|
)
|
||
|
|
return
|
||
|
|
|
||
|
|
if copy_tags:
|
||
|
|
mocker.patch(
|
||
|
|
"pelican.plugins.image_process.image_process.process_image",
|
||
|
|
process_image_mock_exif_tool_started,
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
mocker.patch(
|
||
|
|
"pelican.plugins.image_process.image_process.process_image",
|
||
|
|
process_image_mock_exif_tool_not_started,
|
||
|
|
)
|
||
|
|
|
||
|
|
settings = get_settings(
|
||
|
|
IMAGE_PROCESS_COPY_EXIF_TAGS=copy_tags,
|
||
|
|
IMAGE_PROCESS=COMPLEX_TRANSFORMS,
|
||
|
|
IMAGE_PROCESS_DIR="derivs",
|
||
|
|
)
|
||
|
|
|
||
|
|
harvest_images_in_fragment(
|
||
|
|
'<img class="image-process-thumb" src="/tmp/test.jpg" />', settings
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
@pytest.mark.parametrize("image_path", EXIF_TEST_IMAGES)
|
||
|
|
@pytest.mark.parametrize("copy_tags", [True, False])
|
||
|
|
def test_copy_exif_tags(tmp_path, image_path, copy_tags):
|
||
|
|
if shutil.which("exiftool") is None:
|
||
|
|
warnings.warn(
|
||
|
|
"EXIF tags copying will not be tested because the exiftool program could "
|
||
|
|
"not be found. Please install exiftool and make sure it is in your path."
|
||
|
|
)
|
||
|
|
return
|
||
|
|
|
||
|
|
# A few EXIF tags to test for.
|
||
|
|
exif_tags = [
|
||
|
|
"Artist",
|
||
|
|
"Creator",
|
||
|
|
"Title",
|
||
|
|
"Description",
|
||
|
|
"Subject",
|
||
|
|
"Rating",
|
||
|
|
"ExifImageWidth",
|
||
|
|
]
|
||
|
|
|
||
|
|
settings = get_settings(IMAGE_PROCESS_COPY_EXIF_TAGS=copy_tags)
|
||
|
|
|
||
|
|
transform_id = "grayscale"
|
||
|
|
transform_params = ["grayscale"]
|
||
|
|
image_name = image_path.name
|
||
|
|
destination_path = tmp_path.joinpath(transform_id, image_name)
|
||
|
|
|
||
|
|
expected_results = subprocess.run(
|
||
|
|
["exiftool", "-json", image_path], stdout=subprocess.PIPE
|
||
|
|
)
|
||
|
|
expected_tags = json.loads(expected_results.stdout)[0]
|
||
|
|
for tag in exif_tags:
|
||
|
|
assert tag in expected_tags.keys()
|
||
|
|
|
||
|
|
if copy_tags:
|
||
|
|
ExifTool.start_exiftool()
|
||
|
|
process_image((str(image_path), str(destination_path), transform_params), settings)
|
||
|
|
if copy_tags:
|
||
|
|
ExifTool.stop_exiftool()
|
||
|
|
|
||
|
|
actual_results = subprocess.run(
|
||
|
|
["exiftool", "-json", destination_path], stdout=subprocess.PIPE
|
||
|
|
)
|
||
|
|
|
||
|
|
assert actual_results.returncode == 0
|
||
|
|
|
||
|
|
actual_tags = json.loads(actual_results.stdout)[0]
|
||
|
|
for tag in exif_tags:
|
||
|
|
if copy_tags:
|
||
|
|
assert tag in actual_tags.keys()
|
||
|
|
assert expected_tags[tag] == actual_tags[tag]
|
||
|
|
else:
|
||
|
|
assert tag not in actual_tags.keys()
|
||
|
|
|
||
|
|
|
||
|
|
def test_is_img_identifiable():
|
||
|
|
for test_image in TEST_IMAGES:
|
||
|
|
assert is_img_identifiable(test_image)
|
||
|
|
|
||
|
|
assert not is_img_identifiable("image/that/does/not/exist.png")
|
||
|
|
|
||
|
|
assert not is_img_identifiable(TEST_DATA.joinpath("folded_puzzle.png"))
|
||
|
|
assert not is_img_identifiable(TEST_DATA.joinpath("minimal.svg"))
|
||
|
|
|
||
|
|
img = {"src": "https://upload.wikimedia.org/wikipedia/commons/3/34/Exemple.png"}
|
||
|
|
settings = get_settings(IMAGE_PROCESS_DIR="derivatives")
|
||
|
|
path = compute_paths(img, settings, derivative="thumb")
|
||
|
|
assert not is_img_identifiable(path.source)
|