Index: third_party/WebKit/LayoutTests/fast/css/boundary-crossing-scopes-null-resolver-crash.html |
diff --git a/third_party/WebKit/LayoutTests/fast/css/boundary-crossing-scopes-null-resolver-crash.html b/third_party/WebKit/LayoutTests/fast/css/boundary-crossing-scopes-null-resolver-crash.html |
new file mode 100644 |
index 0000000000000000000000000000000000000000..721a35c92e1357b2e45c32a873553d70e2880c05 |
--- /dev/null |
+++ b/third_party/WebKit/LayoutTests/fast/css/boundary-crossing-scopes-null-resolver-crash.html |
@@ -0,0 +1,29 @@ |
+<!DOCTYPE html> |
+<script src="../../resources/testharness.js"></script> |
+<script src="../../resources/testharnessreport.js"></script> |
+<style>.green { color: green }</style> |
+<div id="host"> |
+ <div id="inner">Green, should not crash.</div> |
+</div> |
+<script> |
+ var root = host.createShadowRoot(); |
+ |
+ test(() => { |
+ root.innerHTML = "<style>:host ::content * { color:red }</style><content>"; |
+ document.body.offsetTop; |
+ assert_equals(getComputedStyle(inner).color, "rgb(255, 0, 0)", "#inner is initially red."); |
+ }, "Check that #inner is initially red."); |
+ |
+ test(() => { |
+ // Inserting a document stylesheet before another one causes a |
+ // StyleResolver Reconstruct. |
+ var newSheet = document.createElement("style"); |
+ newSheet.innerText = "#nomatch { color: red }"; |
+ document.head.insertBefore(newSheet, document.querySelector("style")); |
+ // Removing the shadow stylesheet will cause the ScopedStyleResolver |
+ // to be nuked. |
+ root.innerHTML = "<content>"; |
+ inner.className = "green"; |
+ assert_equals(getComputedStyle(inner).color, "rgb(0, 128, 0)", "Check that #inner is green after the class is set."); |
+ }, "Reconstructing StyleResolver should not leave any treeBoundaryCrossingScopes with null ScopedStyleResolvers in StyleEngine."); |
+</script> |