mailet/api/src/test/java/org/apache/mailet/AttributeValueTest.java

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package org.apache.mailet;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
import static org.assertj.core.api.Assertions.assertThatNullPointerException;
import static org.assertj.core.api.Assertions.assertThatThrownBy;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.time.ZonedDateTime;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;

import org.apache.james.mailbox.model.MessageIdDto;
import org.apache.james.mailbox.model.TestMessageId;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;

import com.fasterxml.jackson.core.io.JsonEOFException;
import com.fasterxml.jackson.databind.JsonNode;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;

import nl.jqno.equalsverifier.EqualsVerifier;

class AttributeValueTest {
    @Test
    void shouldRespectBeanContract() {
        EqualsVerifier.forClass(AttributeValue.class).verify();
    }

    @Test
    void ofShouldThrowAnExceptionOnNullValue() {
        assertThatNullPointerException()
            .isThrownBy(() -> AttributeValue.of((String) null));
    }

    @Nested
    class StringSerialization {
        @Test
        void stringShouldBeSerializedAndBack() {
            AttributeValue<String> expected = AttributeValue.of("value");

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void emptyStringShouldBeSerializedAndBack() {
            AttributeValue<String> expected = AttributeValue.of("");

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullStringShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((String) null));
        }

        @Test
        void fromJsonStringShouldReturnStringAttributeValueWhenString() throws Exception {
            AttributeValue<String> expected = AttributeValue.of("value");

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"StringSerializer\",\"value\": \"value\"}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"StringSerializer\",\"value\": []}"));
        }
    }

    @Nested
    class BooleanSerialization {
        @Test
        void trueShouldBeSerializedAndBack() {
            AttributeValue<Boolean> expected = AttributeValue.of(true);

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void falseShouldBeSerializedAndBack() {
            AttributeValue<Boolean> expected = AttributeValue.of(true);

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullBooleanShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((Boolean) null));
        }

        @Test
        void fromJsonStringShouldReturnBooleanAttributeValueWhenBoolean() throws Exception {
            AttributeValue<Boolean> expected = AttributeValue.of(true);

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"BooleanSerializer\",\"value\": true}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"BooleanSerializer\",\"value\": []}"));
        }
    }

    @Nested
    class IntegerSerialization {
        @Test
        void intShouldBeSerializedAndBack() {
            AttributeValue<Integer> expected = AttributeValue.of(42);

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullIntShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((Integer) null));
        }

        @Test
        void fromJsonStringShouldReturnIntAttributeValueWhenInt() throws Exception {
            AttributeValue<Integer> expected = AttributeValue.of(42);

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"IntSerializer\",\"value\": 42}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"IntSerializer\",\"value\": []}"));
        }

        @Test
        void fromJsonStringShouldThrowOnFloatJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"IntSerializer\",\"value\": 42.0}"));
        }

        @Test
        void fromJsonStringShouldThrowOnLongJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"IntSerializer\",\"value\": 2147483648}"));
            // Int.MAX_VALUE + 1
        }
    }

    @Nested
    class LongSerialization {
        @Test
        void longShouldBeSerializedAndBack() {
            AttributeValue<Long> expected = AttributeValue.of(42L);

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void longShouldBeSerializedAndBackForLongMaxValue() {
            AttributeValue<Long> expected = AttributeValue.of(Long.MAX_VALUE);

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullLongShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((Long) null));
        }

        @Test
        void fromJsonStringShouldReturnLongAttributeValueWhenLong() throws Exception {
            AttributeValue<Long> expected = AttributeValue.of(42L);

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"LongSerializer\",\"value\":42}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"LongSerializer\",\"value\": []}"));
        }

        @Test
        void fromJsonStringShouldThrowOnFloatJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"LongSerializer\",\"value\": 42.0}"));
        }
    }

    @Nested
    class FloatSerialization {
        @Test
        void floatShouldBeSerializedAndBack() {
            AttributeValue<Float> expected = AttributeValue.of(1.0f);

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullFloatShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((Float) null));
        }

        @Test
        void fromJsonStringShouldReturnFloatAttributeValueWhenFloat() throws Exception {
            AttributeValue<Float> expected = AttributeValue.of(1.0f);

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"FloatSerializer\",\"value\":1.0}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"FloatSerializer\",\"value\": []}"));
        }

        @Test
        void fromJsonStringShouldThrowOnIntNode() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"FloatSerializer\",\"value\": 1}"));
        }
    }

    @Nested
    class DoubleSerialization {
        @Test
        void doubleShouldBeSerializedAndBack() {
            AttributeValue<Double> expected = AttributeValue.of(1.0d);

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void doubleShouldBeSerializedAndBackForMaxValue() {
            AttributeValue<Double> expected = AttributeValue.of(Double.MAX_VALUE);

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullDoubleShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((Double) null));
        }

        @Test
        void fromJsonStringShouldReturnDoubleAttributeValueWhenDouble() throws Exception {
            AttributeValue<Double> expected = AttributeValue.of(1.0);

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"DoubleSerializer\",\"value\":1.0}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"DoubleSerializer\",\"value\": []}"));
        }

        @Test
        void fromJsonStringShouldThrowOnIntNode() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"DoubleSerializer\",\"value\": 1}"));
        }
    }

    @Nested
    class DateSerialization {
        @Test
        void dateShouldBeSerializedAndBack() {
            AttributeValue<ZonedDateTime> expected = AttributeValue.of(ZonedDateTime.parse("2015-10-30T16:12:00Z"));

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullDoubleShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((Double) null));
        }

        @Test
        void fromJsonStringShouldReturnDoubleAttributeValueWhenDouble() throws Exception {
            AttributeValue<ZonedDateTime> expected = AttributeValue.of(ZonedDateTime.parse("2015-10-30T16:12:00Z"));

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"DateSerializer\",\"value\":\"2015-10-30T16:12:00Z\"}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"DateSerializer\",\"value\": []}"));
        }

        @Test
        void fromJsonStringShouldThrowOnIntNode() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"DateSerializer\",\"value\": 1}"));
        }
    }

    @Nested
    class QueueSerializableTest {
        @Test
        void queueSerializableShouldBeSerializedAndBack() {
            AttributeValue<TestArbitrarySerializable> expected = AttributeValue.of(new TestArbitrarySerializable(42));

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }


        @Test
        void fromJsonStringShouldReturnQueueSerializableAttributeValueWhenQueueSerializable() throws Exception {
            AttributeValue<TestArbitrarySerializable> expected = AttributeValue.of(new TestArbitrarySerializable(42));

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"ArbitrarySerializableSerializer\",\"value\":{\"deserializer\":\"org.apache.mailet.AttributeValueTest$TestArbitrarySerializable$Factory\",\"value\":{\"serializer\":\"IntSerializer\",\"value\":42}}}");

            assertThat(actual).isEqualTo(expected);
        }
    }

    @Nested
    class UrlSerialization {
        @Test
        void urlShouldBeSerializedAndBack() throws MalformedURLException, URISyntaxException {
            AttributeValue<URL> expected = AttributeValue.of(new URI("https://james.apache.org/").toURL());

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullURLShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((URL) null));
        }

        @Test
        void fromJsonStringShouldReturnUrlAttributeValueWhenUrl() throws Exception {
            AttributeValue<URL> expected = AttributeValue.of(new URI("https://james.apache.org/").toURL());

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"UrlSerializer\",\"value\": \"https://james.apache.org/\"}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedUrl() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"UrlSerializer\",\"value\": \"htps://bad/\"}"));
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"UrlSerializer\",\"value\": {}}"));
        }
    }

    @Nested
    class MessageIdDtoSerialization {
        @Test
        void messageIdShouldBeSerializedAndBack() {
            AttributeValue<MessageIdDto> expected = AttributeValue.of(new MessageIdDto(TestMessageId.of(42)));

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void nullMessageIdDtoShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((MessageIdDto) null));
        }

        @Test
        void fromJsonStringShouldReturnMessageIdAttributeValue() throws Exception {
            AttributeValue<MessageIdDto> expected = AttributeValue.of(new MessageIdDto(TestMessageId.of(42)));

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"MessageIdDtoSerializer\",\"value\":\"42\"}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"MessageIdDtoSerializer\",\"value\": {}}"));
        }
    }

    @Nested
    class ListSerialization {
        @Test
        void nullStringListShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.ofAny((List<String>) null));
        }

        @Test
        void emptyStringListShouldBeSerializedAndBack() {
            AttributeValue<?> expected = AttributeValue.ofAny(ImmutableList.<String>of());

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void listShouldBeSerializedAndBack() {
            AttributeValue<?> expected = AttributeValue.of(ImmutableList.of(AttributeValue.of("first"), AttributeValue.of("second")));

            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldReturnEmptyListAttributeValueWhenEmptyArray() throws Exception {
            AttributeValue<?> expected = AttributeValue.of(ImmutableList.of());

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"CollectionSerializer\",\"value\": []}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldReturnListAttributeValueWhenArray() throws Exception {
            AttributeValue<?> expected = AttributeValue.of(ImmutableList.of(AttributeValue.of("first"), AttributeValue.of("second")));

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"CollectionSerializer\",\"value\":[{\"serializer\":\"StringSerializer\",\"value\":\"first\"},{\"serializer\":\"StringSerializer\",\"value\":\"second\"}]}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"CollectionSerializer\",\"value\": {}}"));
        }

        @Test
        void ofShouldRejectIllegalTypes() {
            ImmutableList invalidList = ImmutableList.of("b");

            assertThatThrownBy(() -> AttributeValue.of(invalidList))
                .isInstanceOf(ClassCastException.class);
        }
    }

    @Nested
    class MapSerialization {
        @SuppressWarnings({ "rawtypes", "unchecked" })
        @Test
        void nullMapShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((Map) null));
        }

        @Test
        void emptyMapShouldBeSerializedAndBack() {
            AttributeValue<?> expected = AttributeValue.of(ImmutableMap.of());
            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void mapWithPrimitiveTypesShouldBeSerializedAndBack() {
            AttributeValue<?> expected = AttributeValue.of(ImmutableMap.of("a", AttributeValue.of("value"), "b", AttributeValue.of(12)));
            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldReturnEmptyMapWhenEmptyMap() throws Exception {
            AttributeValue<Map<String, AttributeValue<?>>> expected = AttributeValue.of(ImmutableMap.of());

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"MapSerializer\",\"value\":{}}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldReturnMapWhenMap() throws Exception {
            AttributeValue<Map<String, AttributeValue<?>>> expected = AttributeValue.of(
                ImmutableMap.of(
                    "a", AttributeValue.of(1),
                    "b", AttributeValue.of(2)));

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"MapSerializer\",\"value\":{\"a\":{\"serializer\":\"IntSerializer\",\"value\":1},\"b\":{\"serializer\":\"IntSerializer\",\"value\":2}}}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"MapSerializer\",\"value\": []}"));
        }

        @Test
        void ofShouldRejectIllegalTypes() {
            ImmutableMap invalid = ImmutableMap.of("b", "c");

            assertThatThrownBy(() -> AttributeValue.of(invalid))
                .isInstanceOf(IllegalArgumentException.class);
        }
    }

    @Nested
    class OptionalSerialization {
        @SuppressWarnings({ "unchecked", "rawtypes" })
        @Test
        void nullMapShouldThrowAnException() {
            assertThatNullPointerException()
                .isThrownBy(() -> AttributeValue.of((Optional) null));
        }

        @Test
        void emptyOptionalShouldBeSerializedAndBack() {
            AttributeValue<?> expected = AttributeValue.of(Optional.empty());
            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void optionalShouldBeSerializedAndBack() {
            AttributeValue<?> expected = AttributeValue.of(Optional.of(AttributeValue.of(42)));
            JsonNode json = expected.toJson().get();
            AttributeValue<?> actual = AttributeValue.fromJson(json);

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldReturnEmptyOptionalWhenEmptyOptional() throws Exception {
            AttributeValue<?> expected = AttributeValue.of(Optional.empty());

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"OptionalSerializer\",\"value\":null}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldReturnOptional() throws Exception {
            AttributeValue<Optional<AttributeValue<Integer>>> expected = AttributeValue.of(
                Optional.of(AttributeValue.of(1)));

            AttributeValue<?> actual = AttributeValue.fromJsonString("{\"serializer\":\"OptionalSerializer\",\"value\":{\"serializer\":\"IntSerializer\",\"value\":1}}");

            assertThat(actual).isEqualTo(expected);
        }

        @Test
        void fromJsonStringShouldThrowOnMalformedFormattedJson() {
            assertThatIllegalStateException()
                .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"OptionalSerializer\",\"value\": []}"));
        }

        @Test
        void ofShouldRejectIllegalTypes() {
            Optional invalid = Optional.of("b");

            assertThatThrownBy(() -> AttributeValue.of(invalid))
                .isInstanceOf(ClassCastException.class);
        }
    }

    @Test
    void fromJsonStringShouldThrowOnUnknownSerializer() {
        assertThatIllegalStateException()
            .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"unknown\",\"value\": \"value\"}"));
    }

    @Test
    void fromJsonStringShouldThrowOnBrokenJson() {
        assertThatThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"StringSerializer\",\"value\": \"Missing closing bracket\""))
            .isInstanceOf(JsonEOFException.class);
    }

    @Test
    void fromJsonStringShouldThrowOnMissingSerializerField() {
        assertThatIllegalStateException()
            .isThrownBy(() -> AttributeValue.fromJsonString("{\"value\": \"value\"}"));
    }

    @Test
    void fromJsonStringShouldThrowOnMissingValueField() {
        assertThatIllegalStateException()
            .isThrownBy(() -> AttributeValue.fromJsonString("{\"serializer\":\"MapSerializer\"}"));
    }

    @Test
    void valueAsShouldCastValueWhenRightType() {
        assertThat(AttributeValue.of("value").valueAs(String.class))
            .contains("value");
    }

    @Test
    void valueAsShouldReturnEmptyWhenWrongType() {
        assertThat(AttributeValue.of("value").valueAs(Boolean.class))
            .isEmpty();
    }

    private static class TestArbitrarySerializable implements ArbitrarySerializable<TestArbitrarySerializable> {
        public static class Factory implements ArbitrarySerializable.Deserializer<TestArbitrarySerializable> {
            @Override
            public Optional<TestArbitrarySerializable> deserialize(Serializable<TestArbitrarySerializable> serializable) {
                return Optional.of(serializable.getValue().value())
                        .filter(Integer.class::isInstance)
                        .map(Integer.class::cast)
                        .map(TestArbitrarySerializable::new);
            }
        }

        private final Integer value;

        public TestArbitrarySerializable(Integer value) {
            this.value = value;
        }

        @Override
        public Serializable<TestArbitrarySerializable> serialize() {
            return new Serializable<>(AttributeValue.of(value), Factory.class);
        }

        @Override
        public final boolean equals(Object o) {
            if (o instanceof TestArbitrarySerializable) {
                TestArbitrarySerializable that = (TestArbitrarySerializable) o;

                return Objects.equals(this.value, that.value);
            }
            return false;
        }

        @Override
        public final int hashCode() {
            return Objects.hash(value);
        }
    }

    private static class TestSerializable implements java.io.Serializable {
        private final String name;

        public TestSerializable(String name) {
            this.name = name;
        }

        @Override
        public final boolean equals(Object o) {
            if (o instanceof TestSerializable) {
                TestSerializable that = (TestSerializable) o;

                return Objects.equals(this.name, that.name);
            }
            return false;
        }

        @Override
        public final int hashCode() {
            return Objects.hash(name);
        }
    }
}