tests: Add a test for the `delete` operator

tests/tests/swfs/avm2/vector_int_delete/Test.as

@@ -0,0 +1,22 @@
+package {
+	public class Test {
+	}
+}
+
+trace("/// var a: Vector.<int> = new <int>[2,3];");
+var a:Vector.<int> = new <int>[2,3];
+
+trace(a[0]);
+trace(a[1]);
+
+trace("/// delete a[0];");
+trace(delete a[0]);
+
+trace(a[0]);
+trace(a[1]);
+
+trace("/// delete a[1];");
+trace(delete a[1]);
+
+trace(a[0]);
+trace(a[1]);

tests/tests/swfs/avm2/vector_int_delete/output.txt

@@ -0,0 +1,11 @@
+/// var a: Vector.<int> = new <int>[2,3];
+2
+3
+/// delete a[0];
+true
+2
+3
+/// delete a[1];
+true
+2
+3