[wptserve] Put // META: scripts after testharness.js (#11344)

Some tests, e.g., [1], expect testharness.js to exist in the script.

Part of #11269.

[1] html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/serialization-via-idb.any.html

infrastructure/server/order-of-metas.any.js

@@ -0,0 +1,10 @@
+// META: global=window,dedicatedworker,sharedworker
+// META: script=resources/expect-seen-testharness.js
+// META: timeout=long
+// META: title=foo
+// META: script=resources/expect-global.js
+// META: script=resources/expect-title-meta.js
+
+test(() => {
+  assert_array_equals(scripts, ['expect-seen-testharness.js', 'expect-global.js', 'expect-title-meta.js']);
+}, "order of scripts");

infrastructure/server/order-of-metas.window.js

@@ -0,0 +1,8 @@
+// META: script=resources/expect-seen-testharness.js
+// META: timeout=long
+// META: title=foo
+// META: script=resources/expect-title-meta.js
+
+test(() => {
+  assert_array_equals(scripts, ['expect-seen-testharness.js', 'expect-title-meta.js']);
+}, "order of scripts");

infrastructure/server/resources/expect-global.js

@@ -0,0 +1,5 @@
+test(() => {
+  assert_true('GLOBAL' in self);
+}, 'GLOBAL exists');
+
+scripts.push('expect-global.js');

infrastructure/server/resources/expect-seen-testharness.js

@@ -0,0 +1,5 @@
+test(() => {
+  assert_true('add_completion_callback' in self);
+}, 'add_completion_callback exists');
+
+var scripts = ['expect-seen-testharness.js'];

infrastructure/server/resources/expect-title-meta.js

@@ -0,0 +1,11 @@
+if (!self.GLOBAL || self.GLOBAL.isWindow()) {
+  test(() => {
+    assert_equals(document.title, "foo");
+  }, '<title> exists');
+
+  test(() => {
+    assert_equals(document.querySelectorAll("meta[name=timeout][content=long]").length, 1);
+  }, '<meta name=timeout> exists');
+}
+
+scripts.push('expect-title-meta.js');

tools/serve/serve.py

@@ -65,7 +65,8 @@ def handle_request(self, request, response):
         if query:
             query = "?" + query
         meta = "\n".join(self._get_meta(request))
-        response.content = self.wrapper % {"meta": meta, "path": path, "query": query}
+        script = "\n".join(self._get_script(request))
+        response.content = self.wrapper % {"meta": meta, "script": script, "path": path, "query": query}
         wrap_pipeline(path, request, response)
 
     def _get_path(self, path, resource_path):
@@ -93,7 +94,7 @@ def _get_path(self, path, resource_path):
         return path
 
     def _get_metadata(self, request):
-        """Get an iterator over script metadata based on //META comments in the
+        """Get an iterator over script metadata based on // META comments in the
         associated js file.
 
         :param request: The Request being processed.
@@ -105,7 +106,7 @@ def _get_metadata(self, request):
 
     def _get_meta(self, request):
         """Get an iterator over strings to inject into the wrapper document
-        based on //META comments in the associated js file.
+        based on // META comments in the associated js file.
 
         :param request: The Request being processed.
         """
@@ -114,6 +115,17 @@ def _get_meta(self, request):
             if replacement:
                 yield replacement
 
+    def _get_script(self, request):
+        """Get an iterator over strings to inject into the wrapper document
+        based on // META comments in the associated js file.
+
+        :param request: The Request being processed.
+        """
+        for key, value in self._get_metadata(request):
+            replacement = self._script_replacement(key, value)
+            if replacement:
+                yield replacement
+
     @abc.abstractproperty
     def path_replace(self):
         # A list containing a mix of 2 item tuples with (input suffix, output suffix)
@@ -159,14 +171,17 @@ def _meta_replacement(self, key, value):
         if key == b"timeout":
             if value == b"long":
                 return '<meta name="timeout" content="long">'
-        if key == b"script":
-            attribute = value.decode('utf-8').replace("&", "&amp;").replace('"', "&quot;")
-            return '<script src="%s"></script>' % attribute
         if key == b"title":
             value = value.decode('utf-8').replace("&", "&amp;").replace("<", "&lt;")
             return '<title>%s</title>' % value
         return None
 
+    def _script_replacement(self, key, value):
+        if key == b"script":
+            attribute = value.decode('utf-8').replace("&", "&amp;").replace('"', "&quot;")
+            return '<script src="%s"></script>' % attribute
+        return None
+
 
 class WorkersHandler(HtmlWrapperHandler):
     global_type = b"dedicatedworker"
@@ -191,6 +206,7 @@ class WindowHandler(HtmlWrapperHandler):
 %(meta)s
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+%(script)s
 <div id=log></div>
 <script src="%(path)s"></script>
 """
@@ -210,6 +226,7 @@ class AnyHtmlHandler(HtmlWrapperHandler):
 </script>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+%(script)s
 <div id=log></div>
 <script src="%(path)s"></script>
 """
@@ -260,11 +277,15 @@ class AnyWorkerHandler(WrapperHandler):
   isWorker: function() { return true; },
 };
 importScripts("/resources/testharness.js");
+%(script)s
 importScripts("%(path)s");
 done();
 """
 
     def _meta_replacement(self, key, value):
+        return None
+
+    def _script_replacement(self, key, value):
         if key == b"script":
             attribute = value.decode('utf-8').replace("\\", "\\\\").replace('"', '\\"')
             return 'importScripts("%s")' % attribute