getEventListeners returns ProxyArray (#13057)

Author: JaroslavTulach

lib/java/ydoc-polyfill/src/main/java/org/enso/ydoc/polyfill/web/EventTarget.java

@@ -6,6 +6,7 @@
 import java.util.function.Function;
 import org.enso.ydoc.polyfill.Arguments;
 import org.graalvm.polyglot.Value;
+import org.graalvm.polyglot.proxy.ProxyArray;
 import org.graalvm.polyglot.proxy.ProxyExecutable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -86,8 +87,9 @@ private static final class EventStore {
       this.listeners = listeners;
     }
 
-    public Value[] getEventListeners(String type) {
-      return listeners.getOrDefault(type, Set.of()).toArray(new Value[0]);
+    public ProxyArray getEventListeners(String type) {
+      var arr = listeners.getOrDefault(type, Set.of()).toArray(new Value[0]);
+      return ProxyArray.fromArray((Object[]) arr);
     }
 
     public void addEventListener(String type, Value listener) {

lib/java/ydoc-polyfill/src/main/java/org/enso/ydoc/polyfill/web/WebEnvironment.java

@@ -11,7 +11,7 @@
 public final class WebEnvironment {
 
   public static final HostAccess.Builder defaultHostAccess =
-      HostAccess.newBuilder(HostAccess.EXPLICIT).allowArrayAccess(true).allowBufferAccess(true);
+      HostAccess.newBuilder(HostAccess.EXPLICIT).allowBufferAccess(true);
 
   private WebEnvironment() {}
 

lib/java/ydoc-polyfill/src/test/java/org/enso/ydoc/polyfill/web/EventTargetTest.java

@@ -43,7 +43,15 @@ public void dispatchEvent() throws Exception {
         """
         var count = 0;
         var et = new EventTarget();
-        et.addEventListener('inc', () => count += 1);
+        var l = () => count += 1;
+        et.addEventListener('inc', l);
+        var arr = et.getEventListeners('inc');
+        if (arr.length != 1) {
+            throw 'Expecting one listener';
+        }
+        if (arr[0] != l) {
+            throw 'Expecting the one listener!';
+        }
         et.dispatchEvent({type: 'inc'});
         count;
         """;