Bug 2001295 [wpt PR 56132] - CustomElementRegistry.prototype.initialize upgrades already initialized elements, a=testonly

Automatic update from web-platform-tests
CustomElementRegistry.prototype.initialize upgrades already initialized elements

For whatwg/html#11913.
--

wpt-commits: ba9d85e81e45978e36b8d4b26b7a91e65383b296
wpt-pr: 56132

UltraBlame original commit: 4a9cf72bcdbbf99913cdf6261cfd935595af6d7d

Author: marco-c

testing/web-platform/tests/custom-elements/registries/scoped-registry-initialize-upgrades.html

@@ -204,7 +204,7 @@
 title
 }
 :
-customElementRegistry
+CustomElementRegistry
 .
 prototype
 .
@@ -529,7 +529,7 @@
 title
 }
 :
-customElementRegistry
+CustomElementRegistry
 .
 prototype
 .
@@ -775,7 +775,7 @@
 title
 }
 :
-customElementRegistry
+CustomElementRegistry
 .
 prototype
 .
@@ -858,6 +858,163 @@
 )
 )
 ;
+test
+(
+(
+)
+=
+>
+{
+class
+ABElement
+extends
+HTMLElement
+{
+}
+;
+const
+registry
+=
+new
+CustomElementRegistry
+;
+const
+element
+=
+document
+.
+createElement
+(
+'
+a
+-
+b
+'
+{
+customElementRegistry
+:
+registry
+}
+)
+;
+assert_equals
+(
+element
+.
+customElementRegistry
+registry
+)
+;
+assert_equals
+(
+element
+.
+__proto__
+.
+constructor
+.
+name
+'
+HTMLElement
+'
+)
+;
+assert_false
+(
+element
+instanceof
+ABElement
+)
+;
+registry
+.
+define
+(
+'
+a
+-
+b
+'
+ABElement
+)
+;
+assert_equals
+(
+element
+.
+customElementRegistry
+registry
+)
+;
+assert_equals
+(
+element
+.
+__proto__
+.
+constructor
+.
+name
+'
+HTMLElement
+'
+)
+;
+assert_false
+(
+element
+instanceof
+ABElement
+)
+;
+registry
+.
+initialize
+(
+element
+)
+;
+assert_equals
+(
+element
+.
+customElementRegistry
+registry
+)
+;
+assert_equals
+(
+element
+.
+__proto__
+.
+constructor
+.
+name
+'
+ABElement
+'
+)
+;
+assert_true
+(
+element
+instanceof
+ABElement
+)
+;
+}
+CustomElementRegistry
+.
+prototype
+.
+initialize
+upgrades
+already
+initialized
+elements
+)
+;
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