Icons: Test the registry sanitizer with a data provider

[t-hamano]

What?

Extracted from #75550.

Improves the unit tests for the icon registry's SVG sanitizer.

Why?

• Icons Registry: improve SVG sanitizer #75550 has grown beyond sanitization: it now also covers how SVG content should be parsed and whether icons should be rendered as img elements, all of which need more discussion.
• The sanitizer changes in Gutenberg (Icons: Redraw 35 prominent icons with consistent stroke widths #78808, Icons: Allow rect and circle in the registry sanitizer #82846) already render every icon in the core icon set correctly, but the unit tests cover only a few cases.

How?

• Introduces a data provider to the sanitizer unit tests so they cover more cases. The previous tests were redundant, as each test method defined its own attributes.
• Uses ReflectionMethod to assert against the sanitizer method directly.
• The core PR that the backport changelog linked to (Icons Registry: improve SVG sanitizer wordpress-develop#12197) raises the same open questions as Icons Registry: improve SVG sanitizer #75550, so I split the sanitizer changes into a dedicated core PR, Icons: Allow additional SVG elements and attributes in the icon sanitizer wordpress-develop#13559, and updated the backport changelog to link to it.

Testing Instructions

All unit tests should pass.

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 5
Used for: Porting the tests from the core PR and drafting this description; reviewed by me.

🤖 Generated with Claude Code

[github-actions]

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Co-authored-by: t-hamano <wildworks@git.wordpress.org>
Co-authored-by: mcsf <mcsf@git.wordpress.org>
Co-authored-by: westonruter <westonruter@git.wordpress.org>

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[mcsf]

Approving based on a cursory look at the code

[westonruter]

cf. Suggestions I made on WordPress/wordpress-develop#13559.

[t-hamano]

Thanks for the review. I've updated this PR accordingly based on the feedback from the core PR.

[github-actions]

🤖 PR meta 🤖

⚡ Performance

Show the results

Client side metrics exclude the server response time.

front-end-block-theme

Metric	98fcf47	trunk	% Change
timeToFirstByte	56.3 ms +7.02% -3.02%	58.9 ms +9.17% -6.2%	-4.41%
largestContentfulPaint	92 ms +6.52% -4.35%	96 ms +6.25% -4.17%	-4.17%
lcpMinusTtfb	34.7 ms +3.89% -3.46%	34.85 ms +19.37% -3.3%	-0.43%
wpBeforeTemplate	28.05 ms +11.34% -2.64%	28.2 ms +20.74% -2.2%	-0.53%
wpTemplate	24.08 ms +3.24% -2.95%	24.41 ms +4.92% -2.87%	-1.35%
wpTotal	52.83 ms +6.97% -3.54%	55.29 ms +8.32% -6.62%	-4.45%
wpMemoryUsage	7.53 MB +0% -0%	7.49 MB +0% -0%	0.47%
wpDbQueries	17 +0% -0%	17 +0% -0%	0%

front-end-classic-theme

Metric	98fcf47	trunk	% Change
timeToFirstByte	47.1 ms +8.6% -1.91%	46.95 ms +5.86% -1.49%	0.32%
largestContentfulPaint	100 ms +6% -0%	100 ms +4% -0%	0%
lcpMinusTtfb	53.9 ms +2.88% -1.21%	53.65 ms +1.21% -1.12%	0.47%
wpBeforeTemplate	26.19 ms +6.87% -1.72%	26.04 ms +3.46% -1.38%	0.58%
wpTemplate	17.81 ms +3.59% -1.46%	17.76 ms +3.6% -0.73%	0.28%
wpTotal	44 ms +8.8% -1.93%	43.8 ms +6.05% -1.3%	0.46%
wpMemoryUsage	6.15 MB +0% -0%	6.11 MB +0% -0%	0.59%
wpDbQueries	14 +0% -0%	14 +0% -0%	0%

media-processing

Metric	98fcf47	trunk	% Change
mediaProcessingJpeg	399.29 ms +1.19% -1.09%	396.71 ms +0.98% -0.05%	0.65%
mediaProcessingAvif	6046.85 ms +0.29% -0.1%	6053.36 ms +0.03% -0.22%	-0.11%
mediaProcessingJpegToAvif	4170.91 ms +0.22% -0.42%	4180.75 ms +0.33% -0.45%	-0.24%

media-upload

Metric	98fcf47	trunk	% Change
jpegUploadProcessing	1439.7 ms +2.49% -1.43%	1420.7 ms +0.88% -0.69%	1.34%
pngUploadProcessing	223.44 ms +3.24% -7.56%	205.17 ms +7.72% -2.14%	8.9%
largeJpegUploadProcessing	1417.12 ms +0.78% -0.44%	1404.84 ms +0.19% -0.57%	0.87%
multipleImageUploadProcessing	1639.26 ms +23.27% -3.55%	1555.36 ms +9.49% -0.22%	5.39%

post-editor

Metric	98fcf47	trunk	% Change
serverResponse	378.75 ms +2.51% -3.33%	401.82 ms +3.09% -6.4%	-5.74%
firstPaint	237.38 ms +23.08% -7.01%	201.76 ms +18.77% -12.62%	17.65%
domContentLoaded	929.8 ms +1.28% -0.48%	942.08 ms +1.26% -1.6%	-1.3%
loaded	930.97 ms +1.27% -0.5%	943.18 ms +1.24% -1.6%	-1.29%
firstContentfulPaint	393.4 ms +1.89% -2.62%	387.13 ms +3.4% -1.54%	1.62%
firstBlock	2689.67 ms +0.94% -1.05%	2689.86 ms +0.44% -1.69%	-0.01%
type	18.27 ms +8.48% -4.27%	18.57 ms +6.52% -4.09%	-1.62%
typeWithoutInspector	17.96 ms +7.07% -6.51%	18.03 ms +5.16% -4.71%	-0.39%
typeWithTopToolbar	22.54 ms +2.26% -3.42%	23.5 ms +7.02% -5.28%	-4.09%
typeContainer	8.5 ms +8.12% -7.18%	8.48 ms +4.95% -6.72%	0.24%
focus	69.21 ms +1.78% -5.45%	67.7 ms +4.36% -10.3%	2.23%
firstFocus	200.46 ms +0% -0%	179.44 ms +0% -0%	11.71%
selectAll	370.52 ms +10.55% -2.46%	365.53 ms +3.87% -0.49%	1.37%
listViewOpen	60.4 ms +10.41% -3.86%	63.16 ms +10.97% -8.53%	-4.37%
inserterOpen	21.13 ms +10.36% -7.43%	23.22 ms +6.68% -12.88%	-9%
inserterHover	2.79 ms +15.41% -17.56%	2.81 ms +12.81% -17.08%	-0.71%
inserterSearch	7.28 ms +8.93% -4.26%	8.27 ms +5.08% -9.79%	-11.97%
loadPatterns	591.24 ms +3% -3.75%	608.21 ms +4.35% -7.41%	-2.79%
wpTotal	369.25 ms +2.51% -3.39%	391.81 ms +2.97% -6.45%	-5.76%
wpMemoryUsage	13.07 MB +0% -0%	13.03 MB +0% -0%	0.28%
wpDbQueries	54 +0% -0%	54 +0% -0%	0%

site-editor

Metric	98fcf47	trunk	% Change
serverResponse	335.01 ms +4.19% -3.46%	327.35 ms +4.81% -2.47%	2.34%
firstPaint	189.91 ms +81.84% -19.08%	187.35 ms +10.76% -14.2%	1.37%
domContentLoaded	824.69 ms +3.89% -1.14%	845.34 ms +1.84% -1.14%	-2.44%
loaded	825.5 ms +3.89% -1.13%	846.14 ms +1.84% -1.14%	-2.44%
firstContentfulPaint	345.15 ms +1.52% -4.31%	347.26 ms +0.61% -2.42%	-0.61%
firstBlock	3029.83 ms +1.13% -2.39%	2984.45 ms +1.15% -1.35%	1.52%
type	16.44 ms +10.4% -6.08%	16.35 ms +4.89% -4.4%	0.55%
navigate	98.02 ms +9.35% -2.99%	102.24 ms +2.34% -2.24%	-4.13%
loadPatterns	1036.98 ms +18.08% -9.43%	1153.96 ms +3.47% -18.37%	-10.14%
loadPages	1066.89 ms +1.01% -1.23%	1087.96 ms +1.3% -0.59%	-1.94%
wpTotal	326.85 ms +4.26% -4.02%	318.9 ms +4.92% -2.5%	2.49%
wpMemoryUsage	12.02 MB +0% -0%	11.97 MB +0% -0%	0.41%
wpDbQueries	44 +0% -2.27%	44 +0% -2.27%	0%

_{0638241 Run}

[westonruter]

LGTM