public void test_5_s() throws Exception {
JSONSerializer serializer = new JSONSerializer(new SerializeWriter());
serializer.config(SerializerFeature.QuoteFieldNames, false);
Assert.assertEquals(false, serializer.isEnabled(SerializerFeature.QuoteFieldNames));
serializer.config(SerializerFeature.UseSingleQuotes, true);
Assert.assertEquals(true, serializer.isEnabled(SerializerFeature.UseSingleQuotes));
serializer.write(Collections.singletonMap("a\nge", 33));
Assert.assertEquals("{'a\\nge':33}", serializer.getWriter().toString());