From 1eeadd5d3922b7cf3c4dd008c75a879b613b2695 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philip=20J=C3=A4genstedt?= <philip@foolip.org>
Date: Fri, 7 Feb 2025 11:16:58 +0100
Subject: [PATCH 1/3] Fail early if @position-try is not supported

---
 .../at-position-try-invalidation-shadow-dom.html                | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html b/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
index 18b6d4731ece42..79f9129ff173f0 100644
--- a/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
+++ b/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
@@ -23,6 +23,8 @@
 </div>
 
 <script>
+  assert_implements(window.CSSPositionTryRule, '@position-try not supported');
+
   test(() => {
     assert_equals(host.offsetLeft, 999999);
   }, "#host is initially left: 999999px");

From a09539c08609db97309fb115ccfc1c49660911d8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philip=20J=C3=A4genstedt?= <philip@foolip.org>
Date: Fri, 7 Feb 2025 11:20:22 +0100
Subject: [PATCH 2/3] Update at-position-try-invalidation-shadow-dom.html

---
 .../at-position-try-invalidation-shadow-dom.html                | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html b/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
index 79f9129ff173f0..5acd8f3a565fc3 100644
--- a/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
+++ b/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
@@ -23,7 +23,7 @@
 </div>
 
 <script>
-  assert_implements(window.CSSPositionTryRule, '@position-try not supported');
+  setup(() => assert_implements(window.CSSPositionTryRule, '@position-try not supported'));
 
   test(() => {
     assert_equals(host.offsetLeft, 999999);

From 4fe786afda9e9aed5e8053ad6274bcd57a5ec396 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philip=20J=C3=A4genstedt?= <philip@foolip.org>
Date: Fri, 7 Feb 2025 14:31:08 +0100
Subject: [PATCH 3/3] Update at-position-try-invalidation-shadow-dom.html

---
 ...-position-try-invalidation-shadow-dom.html | 26 ++++++-------------
 1 file changed, 8 insertions(+), 18 deletions(-)

diff --git a/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html b/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
index 5acd8f3a565fc3..f9ac5a5a1362f4 100644
--- a/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
+++ b/css/css-anchor-position/at-position-try-invalidation-shadow-dom.html
@@ -23,25 +23,15 @@
 </div>
 
 <script>
-  setup(() => assert_implements(window.CSSPositionTryRule, '@position-try not supported'));
-
-  test(() => {
-    assert_equals(host.offsetLeft, 999999);
-  }, "#host is initially left: 999999px");
-
   test(() => {
-    assert_equals(slotted.offsetLeft, 999999);
-  }, "#slotted is initially left: 999999px");
+    assert_equals(host.offsetLeft, 999999,  "#host initial position");
+    assert_equals(slotted.offsetLeft, 999999, "#slotted initial position");
 
-  host.shadowRoot.styleSheets[0].insertRule(`
-    @position-try --pf { left: 100px; }
-  `);
+    host.shadowRoot.styleSheets[0].insertRule(`
+      @position-try --pf { left: 100px; }
+    `);
 
-  test(() => {
-    assert_equals(host.offsetLeft, 100);
-  }, "#host with inserted @position-try applied");
-
-  test(() => {
-    assert_equals(slotted.offsetLeft, 100);
-  }, "#slotted with inserted @position-try applied");
+    assert_equals(host.offsetLeft, 100, "#host position with inserted @position-try applied");
+    assert_equals(slotted.offsetLeft, 100, "#slotted position with inserted @position-try applied");
+  });
 </script>