fix(wpt): substitute the primary domain in fixture templates

Expand {{domains[]}} to the configured primary hostname in fixture content
and sidecar headers. This fixes credentialed CORS fixtures whose allow-origin
header previously retained the literal placeholder.

Cover cross-subdomain requests and default and non-default HTTP ports.

Move the full SRI fixture to passed-cases after both engines pass all 48
subtests; the four-case integrity selection passes 68/68 in both engines.

moli-benchmark/moli_benchmark/wpt_cross/server.py

@@ -1371,6 +1371,7 @@ def _substitute_wpt_template_variables(
             b"ws://" + primary_url_host_bytes + b":" + str(alternate_port).encode("ascii")
         ),
         b"{{host}}": primary_hostname_bytes,
+        b"{{domains[]}}": primary_hostname_bytes,
         b"{{location[scheme]}}": b"http",
         b"{{location[server]}}": current_origin,
         b"{{location[host]}}": request_host_bytes,

moli-benchmark/tests/test_wpt_cross.py

@@ -5518,6 +5518,34 @@ test(() => {}, "ok");
                 ],
             )
 
+    def test_fixture_server_substitutes_primary_domain_in_cors_sidecar(self) -> None:
+        with tempfile.TemporaryDirectory() as root:
+            fixture = Path(root) / "style.css"
+            fixture.write_text("body {}", encoding="utf-8")
+            fixture.with_name("style.css.sub.headers").write_text(
+                "Access-Control-Allow-Origin: {{location[scheme]}}://{{domains[]}}{{GET[acao_port]}}\n"
+                "Access-Control-Allow-Credentials: true\n",
+                encoding="utf-8",
+            )
+
+            for port in (80, 12345):
+                with self.subTest(port=port):
+                    suffix = "" if port == 80 else f":{port}"
+                    query = "" if port == 80 else f"acao_port=%3A{port}"
+                    self.assertEqual(
+                        _static_response_headers(
+                            fixture,
+                            query,
+                            port=port,
+                            request_hostname="www.example.test",
+                            primary_hostname="example.test",
+                        ),
+                        [
+                            ("Access-Control-Allow-Origin", f"http://example.test{suffix}"),
+                            ("Access-Control-Allow-Credentials", "true"),
+                        ],
+                    )
+
     def test_fixture_server_substitution_preserves_non_utf8_bytes(self) -> None:
         body = b"\xff{{host}}\xfe{{ports[http][0]}}"
 
@@ -5530,7 +5558,7 @@ test(() => {}, "ok");
         self,
     ) -> None:
         body = (
-            b"host={{host}} "
+            b"host={{host}} domain={{domains[]}} "
             b"location={{location[hostname]}} "
             b"HTTP_ORIGIN: 'http://' + ORIGINAL_HOST + HTTP_PORT_ELIDED,"
         )
@@ -5542,7 +5570,7 @@ test(() => {}, "ok");
                 request_hostname="www1.localhost",
                 primary_hostname="localhost",
             ),
-            b"host=localhost location=www1.localhost "
+            b"host=localhost domain=localhost location=www1.localhost "
             b"HTTP_ORIGIN: 'http://' + ORIGINAL_HOST + HTTP_PORT_ELIDED,",
         )
 

moli-benchmark/wpt-cross-current/failed-cases.txt

@@ -3523,7 +3523,6 @@ streams/readable-streams/owning-type-video-frame.any.js?moli-wpt-any=window
 streams/readable-streams/owning-type.any.js?moli-wpt-any=dedicatedworker
 streams/readable-streams/owning-type.any.js?moli-wpt-any=window
 subresource-integrity/signatures/tentative/inline.html
-subresource-integrity/subresource-integrity.html
 svg/coordinate-systems/outer-svg-intrinsic-size-001.html
 svg/coordinate-systems/outer-svg-intrinsic-size-002.html
 svg/extensibility/foreignObject/containing-block.html

moli-benchmark/wpt-cross-current/passed-cases.txt

@@ -8512,6 +8512,7 @@ streams/writable-streams/start.any.js?moli-wpt-any=dedicatedworker
 streams/writable-streams/start.any.js?moli-wpt-any=window
 streams/writable-streams/write.any.js?moli-wpt-any=dedicatedworker
 streams/writable-streams/write.any.js?moli-wpt-any=window
+subresource-integrity/subresource-integrity.html
 svg/coordinate-systems/svgtransformlist-replaceitem.html
 svg/coordinate-systems/transform-translate-single-parameter.html
 svg/crashtests/chrome-bug-1172059.html