tests: Add test for `EventDispatcher.toString`

tests/tests/regression_tests.rs

@@ -722,6 +722,7 @@ swf_tests! {
     (as3_proxy_hasproperty, "avm2/proxy_hasproperty", 1),
     (as3_proxy_enumeration, "avm2/proxy_enumeration", 1),
     (as3_nonconflicting_declarations, "avm2/nonconflicting_declarations", 1),
+    (as3_eventdispatcher_tostring, "avm2/eventdispatcher_tostring", 1),
 }
 
 // TODO: These tests have some inaccuracies currently, so we use approx_eq to test that numeric values are close enough.

tests/tests/swfs/avm2/eventdispatcher_tostring/Test.as

@@ -0,0 +1,34 @@
+package {
+	public class Test {
+	}
+}
+
+import flash.events.EventDispatcher;
+
+trace("///Object.prototype.toString = function() { /* ... */ };");
+Object.prototype.toString = (function (old_ts) {
+	return function () {
+		trace("///(Object.prototype.toString called)");
+		return old_ts.apply(this, arguments);
+	}
+}(Object.prototype.toString));
+
+trace("///var ed = new EventDispatcher();");
+var ed = new EventDispatcher();
+
+trace("///ed.toString();");
+trace(ed.toString());
+
+class CustomDispatch extends EventDispatcher {
+	public override function toString() : String {
+		trace("///(CustomDispatch.prototype.toString called);");
+		
+		return super.toString();
+	}
+}
+
+trace("///var cust = new CustomDispatch();");
+var cust = new CustomDispatch();
+
+trace("///cust.toString();");
+trace(cust.toString());

tests/tests/swfs/avm2/eventdispatcher_tostring/output.txt

@@ -0,0 +1,10 @@
+///Object.prototype.toString = function() { /* ... */ };
+///var ed = new EventDispatcher();
+///ed.toString();
+///(Object.prototype.toString called)
+[object EventDispatcher]
+///var cust = new CustomDispatch();
+///cust.toString();
+///(CustomDispatch.prototype.toString called);
+///(Object.prototype.toString called)
+[object CustomDispatch]