test/src/jdk/nashorn/api/scripting/ScriptEngineTest.java

*** 719,728 ****
--- 719,737 ----
          });
          e.eval("var x = 'xy'; x += 'z';c({a:x})");
          assertTrue(invoked.get());
      }
  
+     @Test
+     public void testLengthOnArrayLikeObjects() throws Exception {
+         final ScriptEngine e = new ScriptEngineManager().getEngineByName("nashorn");
+         final Object val = e.eval("var arr = { length: 1, 0: 1}; arr.length");
+ 
+         assertTrue(Number.class.isAssignableFrom(val.getClass()));
+         assertTrue(((Number)val).intValue() == 1);
+     }
+ 
      // @bug JDK-8068603: NashornScriptEngine.put/get() impls don't conform to NPE, IAE spec assertions
      @Test
      public void illegalBindingsValuesTest() throws Exception {
          final ScriptEngineManager manager = new ScriptEngineManager();
          final ScriptEngine e = manager.getEngineByName("nashorn");