Bug 1940068 [wpt PR 49920] - Add test to verify legacy sinks for Trus…

…tedScript are not supported, a=testonly

Automatic update from web-platform-tests
Add test to verify legacy sinks for TrustedScript are not supported (#49920)

This verifies some API for ParentNode/ChildNode [1] [2] don't do any
check for trusted types. This might already be covered by IDL tests but
we just perform a direct verification here. This test fails in Chromium,
which is not aligned with the DOM spec here [3] and performs specific
checks for HTML script elements. Chromium also implements similar
behavior for `ChildNodePart.replaceChildren()` but that's currently not
shipped [4].

[1] https://dom.spec.whatwg.org/#interface-parentnode
[2] https://dom.spec.whatwg.org/#interface-childnode
[3] w3c/trusted-types#494 (comment)
[4] https://groups.google.com/a/chromium.org/g/blink-dev/c/wIADRnljZDA/m/whzEaaAADAAJ
--

wpt-commits: dc4c46629bdddcb8a4cd1f3dc702cb4d2f5eb4ee
wpt-pr: 49920

UltraBlame original commit: b9478748139d73216a1c81ea40747000934f52bc

testing/web-platform/tests/trusted-types/legacy-trusted-scripts.html

@@ -0,0 +1,343 @@
+<
+!
+DOCTYPE
+html
+>
+<
+script
+src
+=
+"
+/
+resources
+/
+testharness
+.
+js
+"
+>
+<
+/
+script
+>
+<
+script
+src
+=
+"
+/
+resources
+/
+testharnessreport
+.
+js
+"
+>
+<
+/
+script
+>
+<
+meta
+http
+-
+equiv
+=
+"
+Content
+-
+Security
+-
+Policy
+"
+content
+=
+"
+require
+-
+trusted
+-
+types
+-
+for
+'
+script
+'
+"
+>
+<
+div
+id
+=
+"
+log
+"
+>
+<
+/
+div
+>
+<
+script
+id
+=
+"
+prependScript
+"
+>
+;
+<
+/
+script
+>
+<
+script
+id
+=
+"
+appendScript
+"
+>
+;
+<
+/
+script
+>
+<
+script
+id
+=
+"
+replaceChildrenScript
+"
+>
+;
+<
+/
+script
+>
+<
+script
+id
+=
+"
+beforeScript
+"
+>
+;
+<
+/
+script
+>
+<
+script
+id
+=
+"
+afterScript
+"
+>
+;
+<
+/
+script
+>
+<
+script
+id
+=
+"
+replaceWithScript
+"
+>
+;
+<
+/
+script
+>
+<
+script
+>
+test
+(
+t
+=
+>
+{
+prependScript
+.
+prepend
+(
+"
+1
+"
+"
+2
+"
+"
+3
+"
+)
+;
+assert_equals
+(
+prependScript
+.
+textContent
+"
+123
+;
+"
+)
+;
+appendScript
+.
+append
+(
+"
+1
+"
+"
+2
+"
+"
+3
+"
+)
+;
+assert_equals
+(
+appendScript
+.
+textContent
+"
+;
+123
+"
+)
+;
+replaceChildrenScript
+.
+replaceChildren
+(
+"
+1
+"
+"
+2
+"
+"
+3
+"
+)
+;
+assert_equals
+(
+replaceChildrenScript
+.
+textContent
+"
+123
+"
+)
+;
+beforeScript
+.
+firstChild
+.
+before
+(
+"
+1
+"
+"
+2
+"
+"
+3
+"
+)
+;
+assert_equals
+(
+beforeScript
+.
+textContent
+"
+123
+;
+"
+)
+;
+afterScript
+.
+firstChild
+.
+after
+(
+"
+1
+"
+"
+2
+"
+"
+3
+"
+)
+;
+assert_equals
+(
+afterScript
+.
+textContent
+"
+;
+123
+"
+)
+;
+replaceWithScript
+.
+firstChild
+.
+replaceWith
+(
+"
+1
+"
+"
+2
+"
+"
+3
+"
+)
+;
+assert_equals
+(
+replaceWithScript
+.
+textContent
+"
+123
+"
+)
+;
+}
+"
+Legacy
+sinks
+for
+TrustedScript
+accept
+arbitrary
+strings
+.
+"
+)
+;
+<
+/
+script
+>