From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 19:32:43 +0200
Subject: Adding upstream version 1:115.7.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../web-font-styled-text-resize-swap.html          | 57 ++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-swap.html

(limited to 'testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-swap.html')
diff --git a/testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-swap.html b/testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-swap.html
new file mode 100644
index 0000000000..61c00fad20
--- /dev/null
+++ b/testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-swap.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  @font-face {
+    font-family: 'ADTestFaceSwap';
+    src: url('/fonts/AD.woff?pipe=trickle(d0.5)');
+    font-display: swap;
+  }
+
+  .test {
+    font-family: 'ADTestFaceSwap';
+  }
+
+</style>
+<!--
+  Web-font styled text that gets resized during swap period should make a
+  LCP emission if the new size is larger than the existing LCP element size.
+-->
+<div class="test">LCP: Web Font Styled Text Resize</div>
+<script>
+  function LCPEntryList() {
+    return new Promise(resolve => {
+      let = lcpEntries = [];
+      new PerformanceObserver((entryList, observer) => {
+        lcpEntries = lcpEntries.concat(entryList.getEntries());
+        if (lcpEntries.length == 2) {
+          resolve(lcpEntries);
+          observer.disconnect();
+        }
+      }).observe({ type: 'largest-contentful-paint', buffered: true });
+    });
+  }
+
+  promise_test(async t => {
+    await document.fonts.ready;
+
+    // Verify web font is downloaded.
+    assert_own_property(window, 'PerformanceResourceTiming', "ResourceTiming not supported");
+    let url = '/fonts/AD.woff?pipe=trickle(d0.5)';
+    var absoluteURL = new URL(url, location.href).href;
+    assert_equals(performance.getEntriesByName(absoluteURL).length, 1, 'Web font\
+    should be downloaded');
+
+    // Verify web font is available.
+    assert_true(document.fonts.check('16px ADTestFaceSwap'), 'Font should be the web font added');
+
+    let entryList = await LCPEntryList();
+
+    // Verify there are 2 LCP entries emitted.
+    assert_equals(entryList.length, 2, 'There should be 2 LCP entries. The 1st one corresponds to the system font and the 2nd the web font.')
+
+    // Verify the size of 2nd LCP entry is larger than that of the 1st one.
+    assert_greater_than(entryList[1].size, entryList[0].size, 'The size of 2ndLCP entry should be larger than that of the 1st one.');
+
+  }, "LCP should be updated if the web font styled text resizes to be larger   during the swap period");
+</script>
-- 
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