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DittoRuntimeExceptionToHttpResponseTest.java
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DittoRuntimeExceptionToHttpResponseTest.java
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/*
* Copyright (c) 2020 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.gateway.service.endpoints.routes;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatNullPointerException;
import static org.mutabilitydetector.unittesting.AllowedReason.provided;
import static org.mutabilitydetector.unittesting.MutabilityAssert.assertInstancesOf;
import static org.mutabilitydetector.unittesting.MutabilityMatchers.areImmutable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.eclipse.ditto.base.model.headers.DittoHeaderDefinition;
import org.eclipse.ditto.base.model.headers.DittoHeaders;
import org.eclipse.ditto.messages.model.MessageHeaderDefinition;
import org.eclipse.ditto.protocol.HeaderTranslator;
import org.eclipse.ditto.base.model.signals.commands.CommandNotSupportedException;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;
import akka.http.javadsl.model.ContentTypes;
import akka.http.javadsl.model.HttpHeader;
import akka.http.javadsl.model.HttpResponse;
import akka.util.ByteString;
/**
* Unit test for {@link DittoRuntimeExceptionToHttpResponse}.
*/
public final class DittoRuntimeExceptionToHttpResponseTest {
private static HeaderTranslator headerTranslator;
@Rule
public final TestName testName = new TestName();
@BeforeClass
public static void setUpClass() {
headerTranslator = HeaderTranslator.of(DittoHeaderDefinition.values(), MessageHeaderDefinition.values());
}
@Test
@Ignore("https://github.com/MutabilityDetector/MutabilityDetector/issues/185")
public void assertImmutability() {
assertInstancesOf(DittoRuntimeExceptionToHttpResponse.class,
areImmutable(),
provided(HeaderTranslator.class).isAlsoImmutable());
}
@Test
public void tryToGetInstanceWithNullHeaderTranslator() {
assertThatNullPointerException()
.isThrownBy(() -> DittoRuntimeExceptionToHttpResponse.getInstance(null))
.withMessage("The headerTranslator must not be null!")
.withNoCause();
}
@Test
public void tryToConvertNullException() {
final DittoRuntimeExceptionToHttpResponse underTest =
DittoRuntimeExceptionToHttpResponse.getInstance(headerTranslator);
assertThatNullPointerException()
.isThrownBy(() -> underTest.apply(null))
.withMessage("The exception must not be null!")
.withNoCause();
}
@Test
public void conversionReturnsExpected() {
final byte invalidApiVersion = -1;
final DittoHeaders dittoHeaders = DittoHeaders.newBuilder()
.correlationId(testName.getMethodName())
.build();
final CommandNotSupportedException exception = CommandNotSupportedException.newBuilder(invalidApiVersion)
.dittoHeaders(dittoHeaders)
.build();
final Map<String, String> externalHeaders = headerTranslator.toExternalHeaders(dittoHeaders);
final List<HttpHeader> httpHeaders = new ArrayList<>(externalHeaders.size());
externalHeaders.forEach((key, value) -> httpHeaders.add(HttpHeader.parse(key, value)));
final HttpResponse expected = HttpResponse.create()
.withStatus(exception.getHttpStatus().getCode())
.withHeaders(httpHeaders)
.withEntity(ContentTypes.APPLICATION_JSON, ByteString.fromString(exception.toJsonString()));
final DittoRuntimeExceptionToHttpResponse underTest =
DittoRuntimeExceptionToHttpResponse.getInstance(headerTranslator);
final HttpResponse actual = underTest.apply(exception);
assertThat(actual).isEqualTo(expected);
}
}