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Tests: Implement fuzzy screenshot comparisons in test-web

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We now read WPT's `<meta name="fuzzy">` tags if present in tests and
apply them while comparing screenshots.
This commit is contained in:
Jelle Raaijmakers 2025-07-16 11:39:55 +02:00 • committed by Tim Ledbetter
commit 0d856a8fa7
Notes: github-actions[bot] 2025-07-17 12:00:27 +00:00
13 changed files with 260 additions and 3 deletions
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20
Libraries/LibWeb/Internals/Internals.cpp
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@ -81,6 +81,26 @@ WebIDL::ExceptionOr<void> Internals::load_reference_test_metadata()
metadata.set("match_references"sv, TRY(collect_references("match"sv)));
metadata.set("mismatch_references"sv, TRY(collect_references("mismatch"sv)));
// Collect all <meta name="fuzzy" content=".."> values.
JsonArray fuzzy_configurations;
auto fuzzy_nodes = TRY(document->query_selector_all("meta[name=fuzzy]"sv));
for (size_t i = 0; i < fuzzy_nodes->length(); ++i) {
auto const* fuzzy_node = fuzzy_nodes->item(i);
auto content = as<DOM::Element>(fuzzy_node)->get_attribute_value(HTML::AttributeNames::content);
JsonObject fuzzy_configuration;
if (content.contains(':')) {
auto content_parts = MUST(content.split_limit(':', 2));
auto reference_url = document->encoding_parse_url(content_parts[0]);
fuzzy_configuration.set("reference"sv, reference_url->to_string());
content = content_parts[1];
}
fuzzy_configuration.set("content"sv, content);
fuzzy_configurations.must_append(fuzzy_configuration);
}
metadata.set("fuzzy"sv, fuzzy_configurations);
page.client().page_did_receive_reference_test_metadata(metadata);
return {};
}