RetrieveFeatureTest.java

/*
 * Copyright (c) 2017 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 */
package org.eclipse.ditto.things.model.signals.commands.query;

import static org.eclipse.ditto.things.model.signals.commands.assertions.ThingCommandAssertions.assertThat;
import static org.mutabilitydetector.unittesting.AllowedReason.provided;
import static org.mutabilitydetector.unittesting.MutabilityAssert.assertInstancesOf;
import static org.mutabilitydetector.unittesting.MutabilityMatchers.areImmutable;

import org.assertj.core.api.Assertions;
import org.eclipse.ditto.json.JsonFactory;
import org.eclipse.ditto.json.JsonFieldSelector;
import org.eclipse.ditto.json.JsonObject;
import org.eclipse.ditto.json.JsonParseOptions;
import org.eclipse.ditto.json.assertions.DittoJsonAssertions;
import org.eclipse.ditto.base.model.json.FieldType;
import org.eclipse.ditto.things.model.ThingId;
import org.eclipse.ditto.things.model.signals.commands.TestConstants;
import org.eclipse.ditto.things.model.signals.commands.ThingCommand;
import org.junit.Ignore;
import org.junit.Test;

import nl.jqno.equalsverifier.EqualsVerifier;


/**
 * Unit test for {@link RetrieveFeature}.
 */
public final class RetrieveFeatureTest {

    private static final String SELECTED_FIELDS = "field1,field2,field3";

    private static final JsonObject KNOWN_JSON = JsonFactory.newObjectBuilder()
            .set(ThingCommand.JsonFields.TYPE, RetrieveFeature.TYPE)
            .set(ThingCommand.JsonFields.JSON_THING_ID, TestConstants.Thing.THING_ID.toString())
            .set(RetrieveFeature.JSON_FEATURE_ID, TestConstants.Feature.HOVER_BOARD_ID)
            .build();

    private static final JsonObject KNOWN_JSON_WITH_FIELD_SELECTION = JsonFactory.newObjectBuilder()
            .set(ThingCommand.JsonFields.TYPE, RetrieveFeature.TYPE)
            .set(ThingCommand.JsonFields.JSON_THING_ID, TestConstants.Thing.THING_ID.toString())
            .set(RetrieveFeature.JSON_FEATURE_ID, TestConstants.Feature.HOVER_BOARD_ID)
            .set(RetrieveFeature.JSON_SELECTED_FIELDS, SELECTED_FIELDS)
            .build();

    private static final JsonParseOptions JSON_PARSE_OPTIONS =
            JsonFactory.newParseOptionsBuilder().withoutUrlDecoding().build();

    private static JsonFieldSelector getJsonFieldSelector() {
        return JsonFactory.newFieldSelector(SELECTED_FIELDS, JSON_PARSE_OPTIONS);
    }

    @Test
    public void assertImmutability() {
        assertInstancesOf(RetrieveFeature.class, areImmutable(),
                provided(JsonFieldSelector.class, ThingId.class).isAlsoImmutable());
    }

    @Test
    public void testHashCodeAndEquals() {
        EqualsVerifier.forClass(RetrieveFeature.class)
                .withRedefinedSuperclass()
                .verify();
    }

    @Test
    public void toJsonReturnsExpected() {
        final RetrieveFeature underTest =
                RetrieveFeature.of(TestConstants.Thing.THING_ID, TestConstants.Feature.HOVER_BOARD_ID,
                        TestConstants.EMPTY_DITTO_HEADERS);
        final JsonObject actualJson = underTest.toJson(FieldType.regularOrSpecial());

        DittoJsonAssertions.assertThat(actualJson).isEqualTo(KNOWN_JSON);
    }

    @Test
    public void createInstanceFromValidJson() {
        final RetrieveFeature underTest =
                RetrieveFeature.fromJson(KNOWN_JSON.toString(), TestConstants.EMPTY_DITTO_HEADERS);

        assertThat(underTest).isNotNull();
        Assertions.assertThat((CharSequence) underTest.getEntityId()).isEqualTo(TestConstants.Thing.THING_ID);
        assertThat(underTest.getFeatureId()).isEqualTo(TestConstants.Feature.HOVER_BOARD_ID);
        assertThat(underTest.getSelectedFields()).isEmpty();
    }

    @Test
    public void jsonSerializationWorksAsExpectedWithSelectedFields() {
        final RetrieveFeature underTest =
                RetrieveFeature.of(TestConstants.Thing.THING_ID, TestConstants.Feature.HOVER_BOARD_ID,
                        getJsonFieldSelector(), TestConstants.EMPTY_DITTO_HEADERS);
        final JsonObject actualJson = underTest.toJson(FieldType.regularOrSpecial());

        DittoJsonAssertions.assertThat(actualJson).isEqualTo(KNOWN_JSON_WITH_FIELD_SELECTION);
    }

    @Test
    public void createInstanceFromValidJsonWithSelectedFields() {
        final RetrieveFeature underTest =
                RetrieveFeature.fromJson(KNOWN_JSON_WITH_FIELD_SELECTION.toString(),
                        TestConstants.EMPTY_DITTO_HEADERS);

        assertThat(underTest).isNotNull();
        Assertions.assertThat((CharSequence) underTest.getEntityId()).isEqualTo(TestConstants.Thing.THING_ID);
        assertThat(underTest.getFeatureId()).isEqualTo(TestConstants.Feature.HOVER_BOARD_ID);
        assertThat(underTest.getSelectedFields()).contains(getJsonFieldSelector());
    }

}