From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 21:33:14 +0200
Subject: Adding upstream version 115.7.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../reftests/href-a-element-attr-change.html       | 29 +++++++++++++++++
 .../svg/linking/reftests/href-a-element-ref.html   |  8 +++++
 .../linking/reftests/href-feImage-element-ref.html | 15 +++++++++
 .../svg/linking/reftests/href-feImage-element.html | 18 +++++++++++
 .../linking/reftests/href-filter-element-ref.html  | 12 +++++++
 .../svg/linking/reftests/href-filter-element.html  | 24 ++++++++++++++
 .../reftests/href-gradient-element-ref.html        | 21 ++++++++++++
 .../linking/reftests/href-gradient-element.html    | 31 ++++++++++++++++++
 .../linking/reftests/href-image-element-ref.html   |  9 ++++++
 .../svg/linking/reftests/href-image-element.html   | 12 +++++++
 .../linking/reftests/href-pattern-element-ref.html | 14 ++++++++
 .../svg/linking/reftests/href-pattern-element.html | 21 ++++++++++++
 .../reftests/href-textPath-element-ref.html        | 20 ++++++++++++
 .../linking/reftests/href-textPath-element.html    | 23 ++++++++++++++
 .../svg/linking/reftests/href-use-element-ref.html | 12 +++++++
 .../svg/linking/reftests/href-use-element.html     | 15 +++++++++
 .../linking/reftests/reference/green-100x100.svg   |  3 ++
 .../reftests/url-processing-invalid-base.svg       | 15 +++++++++
 .../reftests/url-processing-whitespace-001.svg     | 17 ++++++++++
 .../reftests/url-processing-whitespace-002.svg     | 19 +++++++++++
 .../reftests/url-processing-whitespace-003.svg     | 24 ++++++++++++++
 .../reftests/url-reference-local-textpath.svg      | 10 ++++++
 .../reftests/use-descendant-combinator-001.html    | 28 ++++++++++++++++
 .../reftests/use-descendant-combinator-002.html    | 33 +++++++++++++++++++
 .../reftests/use-descendant-combinator-003.html    | 37 ++++++++++++++++++++++
 .../reftests/use-descendant-combinator-ref.html    | 12 +++++++
 .../linking/reftests/use-hidden-attr-change.html   | 32 +++++++++++++++++++
 .../svg/linking/reftests/use-keyframes-ref.html    |  6 ++++
 .../tests/svg/linking/reftests/use-keyframes.html  | 19 +++++++++++
 .../linking/reftests/use-nested-symbol-001.html    | 26 +++++++++++++++
 .../linking/reftests/use-symbol-rendered-001.html  | 31 ++++++++++++++++++
 31 files changed, 596 insertions(+)
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-a-element-attr-change.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-a-element-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-feImage-element-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-feImage-element.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-filter-element-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-filter-element.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-gradient-element-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-gradient-element.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-image-element-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-image-element.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-pattern-element-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-pattern-element.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-textPath-element-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-textPath-element.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-use-element-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/href-use-element.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/reference/green-100x100.svg
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/url-processing-invalid-base.svg
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-001.svg
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-002.svg
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-003.svg
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/url-reference-local-textpath.svg
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-001.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-002.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-003.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-hidden-attr-change.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-keyframes-ref.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-keyframes.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-nested-symbol-001.html
 create mode 100644 testing/web-platform/tests/svg/linking/reftests/use-symbol-rendered-001.html

(limited to 'testing/web-platform/tests/svg/linking/reftests')

diff --git a/testing/web-platform/tests/svg/linking/reftests/href-a-element-attr-change.html b/testing/web-platform/tests/svg/linking/reftests/href-a-element-attr-change.html
new file mode 100644
index 0000000000..c74b2e0156
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-a-element-attr-change.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>href - a element</title>
+<meta name="assert"
+      content="The a element should keep its link status after removing href if there is still xlink:href">
+<link rel="match" href="href-a-element-ref.html">
+<style>
+a:link rect {
+  fill: lime;
+}
+</style>
+<body>
+  <svg width="100" height="100" viewBox="0 0 100 100"
+       xmlns:xlink="http://www.w3.org/1999/xlink" onload="loaded();">
+    <a id="link" href="abc.html" xlink:href="def.html">
+      <rect width="100%" height="100%" fill="red"/>
+    </a>
+  </svg>
+</body>
+<script>
+  function loaded() {
+    document.getElementById('link').removeAttribute('href');
+    requestAnimationFrame(function() {
+      document.documentElement.classList.remove("reftest-wait");
+    });
+  }
+</script>
+</html>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-a-element-ref.html b/testing/web-platform/tests/svg/linking/reftests/href-a-element-ref.html
new file mode 100644
index 0000000000..0c67c98b02
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-a-element-ref.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - a element reference</title>
+<body>
+  <svg width="100" height="100" viewBox="0 0 100 100">
+    <rect width="100%" height="100%" fill="lime"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-feImage-element-ref.html b/testing/web-platform/tests/svg/linking/reftests/href-feImage-element-ref.html
new file mode 100644
index 0000000000..cb3758dfa7
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-feImage-element-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - feImage element reference</title>
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <filter id="Fitted" primitiveUnits="objectBoundingBox">
+      <feImage xlink:href="/images/rgrg-256x256.png"
+               x="0" y="0" width="100%" height="100%"
+               preserveAspectRatio="none"/>
+    </filter>
+    <rect x="20" y="25" width="100" height="110" filter="url(#Fitted)"/>
+    <rect x="20" y="25" width="100" height="110" fill="none" stroke="green"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-feImage-element.html b/testing/web-platform/tests/svg/linking/reftests/href-feImage-element.html
new file mode 100644
index 0000000000..efdbe63a1f
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-feImage-element.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - feImage element</title>
+<meta name="assert" content="The feImage element should accept href">
+<link rel="match" href="href-feImage-element-ref.html">
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <filter id="Fitted" primitiveUnits="objectBoundingBox">
+      <feImage href="/images/rgrg-256x256.png"
+               xlink:href="/images/grgr-256x256.png"
+               x="0" y="0" width="100%" height="100%"
+               preserveAspectRatio="none"/>
+    </filter>
+    <rect x="20" y="25" width="100" height="110" filter="url(#Fitted)"/>
+    <rect x="20" y="25" width="100" height="110" fill="none" stroke="green"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-filter-element-ref.html b/testing/web-platform/tests/svg/linking/reftests/href-filter-element-ref.html
new file mode 100644
index 0000000000..9b009e31d1
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-filter-element-ref.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - filter element reference</title>
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <filter id="blurMe">
+      <feGaussianBlur in="SourceGraphic" stdDeviation="5" />
+    </filter>
+    <circle cx="60" cy="60" r="50" fill="green" filter="url(#blurMe)" />
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-filter-element.html b/testing/web-platform/tests/svg/linking/reftests/href-filter-element.html
new file mode 100644
index 0000000000..3f718d0c55
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-filter-element.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - filter element</title>
+<meta name="assert" content="The filter element should accept href">
+<link rel="match" href="href-filter-element-ref.html">
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <filter id="blurMe">
+      <feGaussianBlur in="SourceGraphic" stdDeviation="5" />
+    </filter>
+    <filter id="dropShadow">
+      <feGaussianBlur in="SourceAlpha" stdDeviation="3" />
+      <feOffset dx="2" dy="4" />
+      <feMerge>
+        <feMergeNode />
+        <feMergeNode in="SourceGraphic" />
+      </feMerge>
+    </filter>
+    <filter id="Copied" href="#blurMe" xlink:href="#dropShadow">
+    </filter>
+    <circle cx="60" cy="60" r="50" fill="green" filter="url(#Copied)"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-gradient-element-ref.html b/testing/web-platform/tests/svg/linking/reftests/href-gradient-element-ref.html
new file mode 100644
index 0000000000..279be683df
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-gradient-element-ref.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - gradient element reference</title>
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <linearGradient id="MyGradient">
+      <stop offset="5%"  stop-color="green"/>
+      <stop offset="95%" stop-color="gold"/>
+    </linearGradient>
+    <rect fill="url(#MyGradient)" stroke="black" x="0" y="0"
+          width="100" height="100"/>
+
+    <radialGradient id="MyRadialGradient">
+      <stop offset="0%" stop-color="red"/>
+      <stop offset="100%" stop-color="blue"/>
+    </radialGradient>
+    <rect x="110" y="0" rx="15" ry="15" width="100" height="100"
+          fill="url(#MyRadialGradient)"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-gradient-element.html b/testing/web-platform/tests/svg/linking/reftests/href-gradient-element.html
new file mode 100644
index 0000000000..2442b6f3d4
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-gradient-element.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - gradient element</title>
+<meta name="assert" content="The gradient element should accept href">
+<link rel="match" href="href-gradient-element-ref.html">
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <linearGradient id="MyGradient">
+      <stop offset="5%"  stop-color="green"/>
+      <stop offset="95%" stop-color="gold"/>
+    </linearGradient>
+    <linearGradient id="MyGradient2">
+      <stop offset="5%"  stop-color="red"/>
+      <stop offset="95%" stop-color="blue"/>
+    </linearGradient>
+    <linearGradient id="CopiedGradient" href="#MyGradient"
+                    xlink:href="#MyGradient2">
+    </linearGradient>
+    <rect fill="url(#CopiedGradient)" stroke="black" x="0" y="0"
+          width="100" height="100"/>
+
+    <radialGradient id="MyRadialGradient">
+      <stop offset="0%" stop-color="red"/>
+      <stop offset="100%" stop-color="blue"/>
+    </radialGradient>
+    <radialGradient id="CopiedRadialGradient" href="#MyRadialGradient"/>
+    <rect x="110" y="0" rx="15" ry="15" width="100" height="100"
+          fill="url(#CopiedRadialGradient)"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-image-element-ref.html b/testing/web-platform/tests/svg/linking/reftests/href-image-element-ref.html
new file mode 100644
index 0000000000..c51906fdec
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-image-element-ref.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - image element reference</title>
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <image xlink:href="/images/green.png" width="100px" height="100px"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-image-element.html b/testing/web-platform/tests/svg/linking/reftests/href-image-element.html
new file mode 100644
index 0000000000..779e33f620
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-image-element.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - image element</title>
+<meta name="assert" content="The image should accept href">
+<link rel="match" href="href-image-element-ref.html">
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <image href="/images/green.png" xlink:href="/images/red.png"
+           width="100px" height="100px"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-pattern-element-ref.html b/testing/web-platform/tests/svg/linking/reftests/href-pattern-element-ref.html
new file mode 100644
index 0000000000..bd8770c974
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-pattern-element-ref.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - pattern element reference</title>
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <pattern id="Pattern" x="0" y="0" width=".25" height=".25">
+      <rect x="0" y="0" width="25" height="25" fill="skyblue"/>
+      <circle cx="25" cy="25" r="20" fill="green" fill-opacity="0.5"/>
+    </pattern>
+    <rect fill="url(#Pattern)" stroke="black" x="0" y="0"
+          width="200" height="200"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-pattern-element.html b/testing/web-platform/tests/svg/linking/reftests/href-pattern-element.html
new file mode 100644
index 0000000000..89aa243152
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-pattern-element.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - pattern element</title>
+<meta name="assert" content="The pattern element should accept href">
+<link rel="match" href="href-pattern-element-ref.html">
+<body>
+  <svg width="300" height="300" viewBox="0 0 300 300">
+    <pattern id="Pattern" x="0" y="0" width=".25" height=".25">
+      <rect x="0" y="0" width="25" height="25" fill="skyblue"/>
+      <circle cx="25" cy="25" r="20" fill="green" fill-opacity="0.5"/>
+    </pattern>
+    <pattern id="Pattern2" x="0" y="0" width=".25" height=".25">
+      <rect x="0" y="0" width="25" height="25" fill="skyblue"/>
+      <circle cx="25" cy="25" r="20" fill="red" fill-opacity="0.5"/>
+    </pattern>
+    <pattern id="CopiedPattern" href="#Pattern" xlink:href="#Pattern2">
+    </pattern>
+    <rect fill="url(#CopiedPattern)" stroke="black" x="0" y="0"
+          width="200" height="200"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-textPath-element-ref.html b/testing/web-platform/tests/svg/linking/reftests/href-textPath-element-ref.html
new file mode 100644
index 0000000000..4e1fd3531d
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-textPath-element-ref.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - textPath element reference</title>
+<body>
+  <svg width="100%" height="100%" viewBox="0 0 1000 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <defs>
+      <path id="MyPath"
+            d="M 100 200
+               C 200 100 300   0 400 100
+               C 500 200 600 300 700 200
+               C 800 100 900 100 900 100" />
+    </defs>
+    <text font-family="Verdana" font-size="40">
+      <textPath xlink:href="#MyPath">
+        We go up, then we go down, then up again
+      </textPath>
+    </text>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-textPath-element.html b/testing/web-platform/tests/svg/linking/reftests/href-textPath-element.html
new file mode 100644
index 0000000000..b31e92224a
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-textPath-element.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - textPath element</title>
+<meta name="assert" content="The textPath element should accept href">
+<link rel="match" href="href-textPath-element-ref.html">
+<body>
+  <svg width="100%" height="100%" viewBox="0 0 1000 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <defs>
+      <path id="MyPath"
+            d="M 100 200
+               C 200 100 300   0 400 100
+               C 500 200 600 300 700 200
+               C 800 100 900 100 900 100" />
+      <path id="MyPath2" d="M 100 100 L 900 100" />
+    </defs>
+    <text font-family="Verdana" font-size="40">
+      <textPath href="#MyPath" xlink:href="#MyPath2">
+        We go up, then we go down, then up again
+      </textPath>
+    </text>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-use-element-ref.html b/testing/web-platform/tests/svg/linking/reftests/href-use-element-ref.html
new file mode 100644
index 0000000000..93577b7643
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-use-element-ref.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - use element reference</title>
+<body>
+  <svg style="display: none">
+    <rect id='refRect' style="fill: red" width="100" height="100" />
+  </svg>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <use xlink:href="#refRect"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/href-use-element.html b/testing/web-platform/tests/svg/linking/reftests/href-use-element.html
new file mode 100644
index 0000000000..e6b37f29e5
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/href-use-element.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>href - use element</title>
+<meta name="assert" content="The use element should accept href">
+<link rel="match" href="href-use-element-ref.html">
+<body>
+  <svg style="display: none">
+    <circle id="refCircle" style="fill: orange" cx="50px" cy="50px" r="50px" />
+    <rect id='refRect' style="fill: red" width="100" height="100" />
+  </svg>
+  <svg width="300" height="300" viewBox="0 0 300 300"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <use href="#refRect" xlink:href="#refCircle"/>
+  </svg>
+</body>
diff --git a/testing/web-platform/tests/svg/linking/reftests/reference/green-100x100.svg b/testing/web-platform/tests/svg/linking/reftests/reference/green-100x100.svg
new file mode 100644
index 0000000000..120941444a
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/reference/green-100x100.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <rect width="100" height="100" fill="green"/>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/url-processing-invalid-base.svg b/testing/web-platform/tests/svg/linking/reftests/url-processing-invalid-base.svg
new file mode 100644
index 0000000000..fc5d7c6b06
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/url-processing-invalid-base.svg
@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:html="http://www.w3.org/1999/xhtml">
+  <title>An invalid base URL makes all internal references invalid</title>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/linking.html#processingURL"/>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/painting.html#SpecifyingPaint"/>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/pservers.html#PaintServerTemplates"/>
+  <html:link rel="match" href="reference/green-100x100.svg"/>
+  <html:base href="invalid:"/>
+  <linearGradient id="p2">
+    <stop stop-color="orange"/>
+  </linearGradient>
+  <linearGradient id="p" href="#p2"/>
+  <rect width="100" height="100" fill="red"/>
+  <rect width="100" height="100" fill="url(#p) green"/>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-001.svg b/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-001.svg
new file mode 100644
index 0000000000..6baa0fdd84
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-001.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:html="http://www.w3.org/1999/xhtml">
+  <title>Leading and trailing whitespace is stripped from (local) URL references (&#x3c;paint&#x3e;)</title>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/linking.html#processingURL"/>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/painting.html#SpecifyingPaint"/>
+  <html:link rel="match" href="reference/green-100x100.svg"/>
+  <linearGradient id="green">
+    <stop stop-color="green"/>
+  </linearGradient>
+  <linearGradient id="red">
+    <stop stop-color="red"/>
+  </linearGradient>
+  <rect width="50" height="50" fill="url(' #green') red"/>
+  <rect width="50" height="50" fill="url('#green ') red" x="50"/>
+  <rect width="50" height="50" fill="url(' #green ') red" y="50"/>
+  <rect width="50" height="50" fill="url(' # red ') green" y="50" x="50"/>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-002.svg b/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-002.svg
new file mode 100644
index 0000000000..ee4969a532
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-002.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:html="http://www.w3.org/1999/xhtml">
+  <title>Leading and trailing whitespace is stripped from (local) URL references (&#x3c;use&#x3e; href)</title>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/linking.html#processingURL"/>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElementHrefAttribute"/>
+  <html:link rel="match" href="reference/green-100x100.svg"/>
+  <defs>
+    <rect id="green" width="50" height="50" fill="green"/>
+    <rect id="red" width="50" height="50" fill="red"/>
+  </defs>
+  <rect width="100" height="100" fill="red"/>
+  <use href=" #green"/>
+  <use href="#green " x="50"/>
+  <use href=" #green " y="50"/>
+  <g transform="translate(50 50)">
+    <rect id="green" width="50" height="50" fill="green"/>
+    <use href=" # red "/>
+  </g>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-003.svg b/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-003.svg
new file mode 100644
index 0000000000..1dabd9f8f9
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/url-processing-whitespace-003.svg
@@ -0,0 +1,24 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:html="http://www.w3.org/1999/xhtml">
+  <title>Leading and trailing whitespace is stripped from (local) URL references (&#x3c;linearGradient&#x3e; href)</title>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/linking.html#processingURL"/>
+  <html:link rel="help" href="https://svgwg.org/svg2-draft/pservers.html#PaintServerTemplates"/>
+  <html:link rel="match" href="reference/green-100x100.svg"/>
+  <linearGradient id="green">
+    <stop stop-color="green"/>
+  </linearGradient>
+  <linearGradient id="red">
+    <stop stop-color="red"/>
+  </linearGradient>
+  <linearGradient id="g1" href=" #green"/>
+  <linearGradient id="g2" href="#green "/>
+  <linearGradient id="g3" href=" #green "/>
+  <linearGradient id="g4" href=" # red ">
+    <stop stop-color="green"/>
+  </linearGradient>
+  <rect width="100" height="100" fill="red"/>
+  <rect width="50" height="50" fill="url(#g1) red"/>
+  <rect width="50" height="50" fill="url(#g2) red" x="50"/>
+  <rect width="50" height="50" fill="url(#g3) red" y="50"/>
+  <rect width="50" height="50" fill="url(#g4) red" y="50" x="50"/>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/url-reference-local-textpath.svg b/testing/web-platform/tests/svg/linking/reftests/url-reference-local-textpath.svg
new file mode 100644
index 0000000000..c90cfb317f
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/url-reference-local-textpath.svg
@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:h="http://www.w3.org/1999/xhtml">
+  <title>Local URL reference on &#x3c;textPath&#x3e; with base URL different from document URL</title>
+  <h:link rel="stylesheet" type="text/css" href="/fonts/ahem.css"/>
+  <h:link rel="help" href="https://svgwg.org/svg2-draft/linking.html#linkRefAttrs"/>
+  <h:link rel="match" href="reference/green-100x100.svg"/>
+  <h:base href="http://www.example.com/"/>
+
+  <path id="path" d="M0,80h100"/>
+  <text font-size="100" font-family="Ahem" fill="green"><textPath href="#path">X</textPath></text>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-001.html b/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-001.html
new file mode 100644
index 0000000000..5619e0ba69
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-001.html
@@ -0,0 +1,28 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test: use element doesn't cross shadow tree boundaries in selector-matching</title>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
+<link rel="match" href="/svg/linking/reftests/use-descendant-combinator-ref.html">
+<style>
+#test rect {
+  stroke: red;
+  stroke-width: 10px;
+}
+</style>
+<p>
+  You should see a green square, and no red.
+</p>
+<svg
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <g id="square">
+      <rect width="100" height="100"/>
+    </g>
+  </defs>
+  <g id="test">
+    <use xlink:href="#square" fill="green" />
+  </g>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-002.html b/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-002.html
new file mode 100644
index 0000000000..643f20d16d
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-002.html
@@ -0,0 +1,33 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test: use element doesn't cross shadow tree boundaries in selector-matching</title>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
+<link rel="match" href="/svg/linking/reftests/use-descendant-combinator-ref.html">
+<style>
+#test rect {
+  stroke: red;
+  stroke-width: 10px;
+}
+.inside-use rect {
+  fill: green;
+}
+</style>
+<p>
+  You should see a green square, and no red.
+</p>
+<svg
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <g id="square">
+      <g class="inside-use">
+        <rect width="100" height="100"/>
+      </g>
+    </g>
+  </defs>
+  <g id="test">
+    <use xlink:href="#square" />
+  </g>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-003.html b/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-003.html
new file mode 100644
index 0000000000..14bf5bd122
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-003.html
@@ -0,0 +1,37 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test: use element doesn't cross shadow tree boundaries in selector-matching, and is invalidated properly</title>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
+<link rel="match" href="/svg/linking/reftests/use-descendant-combinator-ref.html">
+<style>
+#test rect {
+  stroke: red;
+  stroke-width: 10px;
+}
+.inside-use rect {
+  fill: red;
+}
+defs .inside-use rect {
+  fill: red;
+}
+</style>
+<p>
+  You should see a green square, and no red.
+</p>
+<svg>
+  <defs>
+    <g id="square">
+      <g class="inside-use">
+        <rect width="100" height="100"/>
+      </g>
+    </g>
+  </defs>
+  <g id="test">
+    <use href="#square" />
+  </g>
+</svg>
+<script>
+  document.body.offsetTop;
+  document.styleSheets[0].cssRules[1].style.fill = 'green';
+</script>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-ref.html b/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-ref.html
new file mode 100644
index 0000000000..dae3fc1173
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-descendant-combinator-ref.html
@@ -0,0 +1,12 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test reference</title>
+<p>
+  You should see a green square, and no red.
+</p>
+<svg
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink">
+  <rect width="100" height="100" fill="green"/>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-hidden-attr-change.html b/testing/web-platform/tests/svg/linking/reftests/use-hidden-attr-change.html
new file mode 100644
index 0000000000..4fe535bbac
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-hidden-attr-change.html
@@ -0,0 +1,32 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>use element reacts to attribute changes when it's not rendered</title>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1502658">
+<link rel="match" href="/svg/linking/reftests/use-descendant-combinator-ref.html">
+<style>
+</style>
+<p>
+  You should see a green square, and no red.
+</p>
+<svg
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink"
+  style="display: none">
+  <defs>
+    <g id="square">
+      <rect width="100" height="100" fill="green" />
+    </g>
+  </defs>
+  <g id="test">
+    <use />
+  </g>
+</svg>
+<script>
+  onload = () => {
+    document.querySelector("use").setAttributeNS("http://www.w3.org/1999/xlink", "href", "#square");
+    document.querySelector("svg").style.display = "";
+  }
+</script>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-keyframes-ref.html b/testing/web-platform/tests/svg/linking/reftests/use-keyframes-ref.html
new file mode 100644
index 0000000000..7d96781805
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-keyframes-ref.html
@@ -0,0 +1,6 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Test Reference</title>
+<svg width="100" height="100" viewBox="0 0 100 100">
+  <rect width="100%" height="100%" fill="lime" />
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-keyframes.html b/testing/web-platform/tests/svg/linking/reftests/use-keyframes.html
new file mode 100644
index 0000000000..2ae24138f2
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-keyframes.html
@@ -0,0 +1,19 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Test: Keyframe animations from the document match in use elements</title>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="author" title="Mozilla" href="https://mozilla.org">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1513920">
+<link rel="match" href="use-keyframes-ref.html">
+<style>
+@keyframes animationname {
+  from { fill: lime; }
+  to { fill: lime; }
+}
+</style>
+<svg width="100" height="100" viewBox="0 0 100 100">
+  <symbol id="symbol">
+    <rect width="100%" height="100%" fill="red" style="animation: animationname 1s infinite;" />
+  </symbol>
+  <use href="#symbol" />
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-nested-symbol-001.html b/testing/web-platform/tests/svg/linking/reftests/use-nested-symbol-001.html
new file mode 100644
index 0000000000..7008a2512a
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-nested-symbol-001.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test: symbol doesn't improperly render in svg use shadow tree</title>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1547619">
+<link rel="match" href="/svg/linking/reftests/use-descendant-combinator-ref.html">
+<p>
+  You should see a green square, and no red.
+</p>
+<svg
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <symbol id="square">
+      <rect width="100" height="100"/>
+      <symbol>
+        <rect width="100" height="100" fill="red" />
+      </symbol>
+    </symbol>
+  </defs>
+  <g id="test">
+    <use xlink:href="#square" fill="green" />
+  </g>
+</svg>
diff --git a/testing/web-platform/tests/svg/linking/reftests/use-symbol-rendered-001.html b/testing/web-platform/tests/svg/linking/reftests/use-symbol-rendered-001.html
new file mode 100644
index 0000000000..b3ca3a321a
--- /dev/null
+++ b/testing/web-platform/tests/svg/linking/reftests/use-symbol-rendered-001.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test: symbol referenced in a use shadow tree should actually be a symbol</title>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#SymbolNotes">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1547619">
+<link rel="match" href="/svg/linking/reftests/use-descendant-combinator-ref.html">
+<p>
+  You should see a green square, and no red.
+</p>
+<style>
+rect {
+  fill: red;
+}
+symbol rect {
+  fill: green;
+}
+</style>
+<svg
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <symbol id="square">
+      <rect width="100" height="100"/>
+    </symbol>
+  </defs>
+  <g id="test">
+    <use xlink:href="#square" fill="green" />
+  </g>
+</svg>
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