when:
        inputs.property('a', { "hey ${new NotSerializable()}" })

        then:
        inputProperties() == [a: "hey Joe"]
        String.is inputProperties().a.class
    }

    class NotSerializable {
        String toString() { "Joe" }
    }

    def "can register non-source files"() {
        when:

            it.setCurrentDir(rootDir)
            overrides.delegate = it
            overrides()
        }
    }

    static class NotSerializable {
    }
    static final NULL_OBJECT = new NotSerializable()

    }
    fail();
  }

  public static class BadSerializableFactory {
    public static Object bad() {
      return new Serializable() {
        @SuppressWarnings("unused")
        private final Object notSerializable = new Object();
      };
    }
  }

  public void testEqualsAndSerializableOnReturnValues_equalsIsGoodButNotSerializable()
      throws Exception {
    try {