The spec
http://docs.oracle.com/javase/8/docs/api/javax/script/ScriptContext.html
asserts plenty of IAE/NPE exception throwing for getter/setter methods, however this is not completely fulfilled by the state/instance of SimpleScriptContext used by NashornScriptEngine; the following code will produce no exceptions:


        new ScriptEngineManager()
            .getEngineFactories()
            .stream()
            .map(ScriptEngineFactory::getScriptEngine)
            .map(engine -> {
                System.err.println("engine: " + engine);
                return engine.getContext();
            })
            .forEach(c -> {
                System.err.println("context: " + c);
                c.getAttribute("");
                c.getAttribute(null);
                c.getAttribute("", ScriptContext.ENGINE_SCOPE);
                c.getAttribute(null, ScriptContext.ENGINE_SCOPE);
                c.removeAttribute(null, ScriptContext.ENGINE_SCOPE);
                c.removeAttribute("", ScriptContext.ENGINE_SCOPE);
                c.setAttribute("", "value", ScriptContext.ENGINE_SCOPE);
                c.setAttribute(null, "value", ScriptContext.ENGINE_SCOPE);
                c.getAttributesScope("");
                c.getAttributesScope(null);
            });

However if SimpleScriptContext instance is created manually the expected exceptions are thrown - any of the following lines WILL cause the expected NPE or IAE:

        new SimpleScriptContext().getAttribute("");
        new SimpleScriptContext().getAttribute(null);
        new SimpleScriptContext().getAttribute("", ScriptContext.ENGINE_SCOPE);
        new SimpleScriptContext().getAttribute(null, ScriptContext.ENGINE_SCOPE);
        new SimpleScriptContext().removeAttribute(null, ScriptContext.ENGINE_SCOPE);
        new SimpleScriptContext().removeAttribute("", ScriptContext.ENGINE_SCOPE);
        new SimpleScriptContext().setAttribute("", "value", ScriptContext.ENGINE_SCOPE);
        new SimpleScriptContext().setAttribute(null, "value", ScriptContext.ENGINE_SCOPE);
        new SimpleScriptContext().getAttributesScope("");
        new SimpleScriptContext().getAttributesScope(null);

---

The following JCK9 tests will fail due to the problem with Nashorn:

api/javax_script/ScriptContext/index.html#Exceptions[getAttribute_IAE_emptyName]
api/javax_script/ScriptContext/index.html#Exceptions[getAttribute_NPE]
api/javax_script/ScriptContext/index.html#Exceptions[getAttribute_noScope_IAE_emptyName]
api/javax_script/ScriptContext/index.html#Exceptions[getAttribute_noScope_NPE]
api/javax_script/ScriptContext/index.html#Exceptions[getAttributesScope_noScope_IAE_emptyName]
api/javax_script/ScriptContext/index.html#Exceptions[getAttributesScope_noScope_NPE]
api/javax_script/ScriptContext/index.html#Exceptions[removeAttribute_IAE_emptyName]
api/javax_script/ScriptContext/index.html#Exceptions[removeAttribute_NPE]
api/javax_script/ScriptContext/index.html#Exceptions[setAttribute_IAE_emptyName]
api/javax_script/ScriptContext/index.html#Exceptions[setAttribute_NPE]

Please note these tests are not targeted or specific for Nashorn - they check any implementation found on a particular JavaSE platform and they fail for Oracle JDK.