Bug 1907849: part 9) Extend WPT to check sink value of "Document pars…

…eHTMLUnsafe". r=smaug

One step towards fixing w3c/trusted-types#494.

Differential Revision: https://phabricator.services.mozilla.com/D232363

UltraBlame original commit: cb3e58c8b7ff8d78bfab512fae053cc7de5d787b

testing/web-platform/tests/trusted-types/block-string-assignment-to-Document-parseHTMLUnsafe.html

@@ -115,6 +115,34 @@
 "
 >
 <
+link
+rel
+=
+"
+help
+"
+href
+=
+"
+https
+:
+/
+/
+html
+.
+spec
+.
+whatwg
+.
+org
+/
+#
+dom
+-
+parsehtmlunsafe
+"
+>
+<
 /
 head
 >
@@ -316,9 +344,31 @@
 {
 createHTML
 :
+(
+value
+_
+sink
+)
+=
+>
+{
+assert_equals
+(
+sink
+"
+Document
+parseHTMLUnsafe
+"
+)
+;
+return
 createHTMLJS
+(
+value
+)
+;
+}
 }
-true
 )
 ;
 let