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RootRouteExceptionHandlerTest.java
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RootRouteExceptionHandlerTest.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.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.concurrent.CompletionException;
import java.util.function.Function;
import java.util.function.Supplier;
import org.eclipse.ditto.base.model.exceptions.DittoJsonException;
import org.eclipse.ditto.base.model.exceptions.DittoRuntimeException;
import org.eclipse.ditto.base.model.headers.DittoHeaders;
import org.eclipse.ditto.gateway.api.GatewayMethodNotAllowedException;
import org.eclipse.ditto.json.JsonMissingFieldException;
import org.eclipse.ditto.json.JsonRuntimeException;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.junit.MockitoJUnitRunner;
import org.apache.pekko.http.javadsl.model.HttpRequest;
import org.apache.pekko.http.javadsl.model.HttpResponse;
import org.apache.pekko.http.javadsl.model.MediaTypes;
import org.apache.pekko.http.javadsl.model.StatusCodes;
import org.apache.pekko.http.javadsl.server.Directives;
import org.apache.pekko.http.javadsl.server.ExceptionHandler;
import org.apache.pekko.http.javadsl.server.RejectionHandler;
import org.apache.pekko.http.javadsl.server.Route;
import org.apache.pekko.http.javadsl.testkit.JUnitRouteTest;
import org.apache.pekko.http.javadsl.testkit.TestRoute;
/**
* Unit test for {@link RootRouteExceptionHandler}.
*/
@RunWith(MockitoJUnitRunner.class)
public final class RootRouteExceptionHandlerTest extends JUnitRouteTest {
private static final String ROUTE_PATH = "foo";
private static final HttpRequest HTTP_REQUEST = HttpRequest.GET("/" + ROUTE_PATH);
@Rule
public final TestName testName = new TestName();
@Mock
private Function<DittoRuntimeException, HttpResponse> dreToHttpResponse;
private ExceptionHandler underTest;
@Before
public void setUp() {
underTest = RootRouteExceptionHandler.getInstance(dreToHttpResponse);
}
@Test
public void assertImmutability() {
assertInstancesOf(RootRouteExceptionHandler.class,
areImmutable(),
provided(Function.class).isAlsoImmutable());
}
@Test
public void tryToGetInstanceWithNullFunction() {
assertThatNullPointerException()
.isThrownBy(() -> RootRouteExceptionHandler.getInstance(null))
.withMessage("The dittoRuntimeExceptionToHttpResponse must not be null!")
.withNoCause();
}
@Test
public void handleDittoRuntimeException() {
final DittoHeaders dittoHeaders = DittoHeaders.newBuilder()
.correlationId(testName.getMethodName())
.build();
final GatewayMethodNotAllowedException exception = GatewayMethodNotAllowedException.newBuilder("GET")
.dittoHeaders(dittoHeaders)
.build();
final TestRoute testRoute = getTestRoute(() -> {
throw exception;
});
testRoute.run(HTTP_REQUEST);
Mockito.verify(dreToHttpResponse).apply(Mockito.eq(exception));
}
@Test
public void handleJsonRuntimeException() {
final JsonRuntimeException jsonRuntimeException = JsonMissingFieldException.newBuilder()
.fieldName("myField")
.build();
final DittoHeaders dittoHeaders = DittoHeaders.newBuilder()
.correlationId(testName.getMethodName())
.build();
final DittoJsonException dittoJsonException = new DittoJsonException(jsonRuntimeException, dittoHeaders);
final TestRoute testRoute = getTestRoute(() -> {
throw jsonRuntimeException;
});
testRoute.run(HTTP_REQUEST);
Mockito.verify(dreToHttpResponse).apply(Mockito.eq(dittoJsonException));
}
@Test
public void handleCompletionExceptionWithUnhandledRuntimeExceptionAsCause() {
final NumberFormatException numberFormatException = new NumberFormatException("42");
final CompletionException completionException = new CompletionException(numberFormatException);
final TestRoute testRoute = getTestRoute(() -> {
throw completionException;
});
testRoute.run(HTTP_REQUEST)
.assertStatusCode(StatusCodes.INTERNAL_SERVER_ERROR)
.assertMediaType(MediaTypes.TEXT_PLAIN);
Mockito.verifyNoInteractions(dreToHttpResponse);
}
@Test
public void handleCompletionExceptionWithDittoRuntimeExceptionAsCause() {
final DittoHeaders dittoHeaders = DittoHeaders.newBuilder()
.correlationId(testName.getMethodName())
.build();
final GatewayMethodNotAllowedException gatewayMethodNotAllowedException =
GatewayMethodNotAllowedException.newBuilder("GET")
.dittoHeaders(dittoHeaders)
.build();
final CompletionException completionException = new CompletionException(gatewayMethodNotAllowedException);
final TestRoute testRoute = getTestRoute(() -> {
throw completionException;
});
testRoute.run(HTTP_REQUEST);
Mockito.verify(dreToHttpResponse).apply(Mockito.eq(gatewayMethodNotAllowedException));
}
@Test
public void handleCompletionExceptionWithJsonRuntimeExceptionAsCause() {
final JsonRuntimeException jsonRuntimeException = JsonMissingFieldException.newBuilder()
.fieldName("myField")
.build();
final DittoHeaders dittoHeaders = DittoHeaders.newBuilder()
.correlationId(testName.getMethodName())
.build();
final DittoJsonException dittoJsonException = new DittoJsonException(jsonRuntimeException, dittoHeaders);
final CompletionException completionException = new CompletionException(jsonRuntimeException);
final TestRoute testRoute = getTestRoute(() -> {
throw completionException;
});
testRoute.run(HTTP_REQUEST);
Mockito.verify(dreToHttpResponse).apply(Mockito.eq(dittoJsonException));
}
@Test
public void handleUnknownExceptionAsInternalServerError() {
final TestRoute testRoute = getTestRoute(() -> {
throw new NumberFormatException("42");
});
testRoute.run(HTTP_REQUEST)
.assertStatusCode(StatusCodes.INTERNAL_SERVER_ERROR)
.assertMediaType(MediaTypes.TEXT_PLAIN);
Mockito.verifyNoInteractions(dreToHttpResponse);
}
@Test
public void handleUnknownErrorAsInternalServerError() {
final TestRoute testRoute = getTestRoute(() -> {
throw new AssertionError();
});
testRoute.run(HTTP_REQUEST)
.assertStatusCode(StatusCodes.INTERNAL_SERVER_ERROR)
.assertMediaType(MediaTypes.TEXT_PLAIN);
Mockito.verifyNoInteractions(dreToHttpResponse);
}
private TestRoute getTestRoute(final Supplier<Route> innerRouteSupplier) {
final Route dummyRoute = Directives.get(() -> Directives.path(ROUTE_PATH, innerRouteSupplier));
return testRoute(dummyRoute.seal(RejectionHandler.defaultHandler(), underTest));
}
}