forked from googleapis/gax-java
/
ApiMessageOperationTransformersTest.java
235 lines (204 loc) · 8.34 KB
/
ApiMessageOperationTransformersTest.java
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/*
* Copyright 2019 Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.google.api.gax.httpjson;
import com.google.api.gax.httpjson.ApiMessageOperationTransformers.MetadataTransformer;
import com.google.api.gax.httpjson.ApiMessageOperationTransformers.ResponseTransformer;
import com.google.api.gax.httpjson.testing.FakeApiMessage;
import com.google.api.gax.longrunning.OperationSnapshot;
import com.google.api.gax.rpc.ApiException;
import com.google.api.gax.rpc.StatusCode;
import com.google.api.gax.rpc.StatusCode.Code;
import com.google.api.gax.rpc.UnavailableException;
import com.google.common.collect.ImmutableMap;
import com.google.common.truth.Truth;
import java.util.List;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for ApiMessageOperationTransformers. */
@RunWith(JUnit4.class)
public class ApiMessageOperationTransformersTest {
@Test
public void testResponseTransformer() {
ResponseTransformer<EmptyMessage> transformer = ResponseTransformer.create(EmptyMessage.class);
EmptyMessage emptyResponse = EmptyMessage.getDefaultInstance();
FakeMetadataMessage metadata = new FakeMetadataMessage(Status.PENDING, Code.OK);
OperationSnapshot operationSnapshot =
new OperationSnapshotImpl(
new FakeOperationMessage<>("Pending; no response method", emptyResponse, metadata));
Truth.assertThat(transformer.apply(operationSnapshot)).isEqualTo(emptyResponse);
}
@Test
public void testResponseTransformer_exception() {
ResponseTransformer<EmptyMessage> transformer = ResponseTransformer.create(EmptyMessage.class);
EmptyMessage emptyResponse = EmptyMessage.getDefaultInstance();
FakeMetadataMessage metadata = new FakeMetadataMessage(Status.PENDING, Code.UNAVAILABLE);
OperationSnapshot operationSnapshot =
new OperationSnapshotImpl(
new FakeOperationMessage<>("Unavailable; no response method", emptyResponse, metadata));
try {
transformer.apply(operationSnapshot);
Assert.fail("ResponseTransformer should have thrown an exception");
} catch (UnavailableException expected) {
Truth.assertThat(expected).hasMessageThat().contains("Unavailable; no response method");
}
}
@Test
public void testResponseTransformer_mismatchedTypes() {
ResponseTransformer<EmptyMessage> transformer = ResponseTransformer.create(EmptyMessage.class);
FakeMetadataMessage metadata = new FakeMetadataMessage(Status.PENDING, Code.OK);
ApiMessage bananaResponse =
new FakeApiMessage(ImmutableMap.<String, Object>of("name", "banana"), null, null);
OperationSnapshot operationSnapshot =
new OperationSnapshotImpl(
new FakeOperationMessage<>("No response method", bananaResponse, metadata));
try {
transformer.apply(operationSnapshot);
Assert.fail("ResponseTransformer should have thrown an exception");
} catch (ApiException expected) {
Truth.assertThat(expected).hasMessageThat().contains("cannot be cast");
}
}
@Test
public void testMetadataTransformer() {
MetadataTransformer<FakeMetadataMessage> transformer =
MetadataTransformer.create(FakeMetadataMessage.class);
EmptyMessage returnType = EmptyMessage.getDefaultInstance();
FakeMetadataMessage metadataMessage = new FakeMetadataMessage(Status.PENDING, Code.OK);
FakeOperationMessage operation = new FakeOperationMessage<>("foo", returnType, metadataMessage);
OperationSnapshot operationSnapshot = new OperationSnapshotImpl(operation);
Truth.assertThat(transformer.apply(operationSnapshot)).isEqualTo(metadataMessage);
}
@Test
public void testMetadataTransformer_mismatchedTypes() {
MetadataTransformer<FakeOperationMessage> transformer =
MetadataTransformer.create(FakeOperationMessage.class);
FakeMetadataMessage metadataMessage = new FakeMetadataMessage(Status.PENDING, Code.OK);
ApiMessage bananaResponse =
new FakeApiMessage(ImmutableMap.<String, Object>of("name", "banana"), null, null);
FakeOperationMessage metadata =
new FakeOperationMessage<>("No response method", bananaResponse, metadataMessage);
OperationSnapshot operationSnapshot = new OperationSnapshotImpl(metadata);
try {
transformer.apply(operationSnapshot);
Assert.fail("MetadataTransformer should have thrown an exception");
} catch (ApiException expected) {
Truth.assertThat(expected).hasMessageThat().contains("cannot be cast");
}
}
private enum Status {
PENDING,
DONE
}
private static class FakeMetadataMessage<ResponseT extends ApiMessage> implements ApiMessage {
private final Status status;
private final Code code;
public FakeMetadataMessage(Status status, Code code) {
this.status = status;
this.code = code;
}
public Object getFieldValue(String fieldName) {
if ("status".equals(fieldName)) {
return status;
}
if ("code".equals(fieldName)) {
return code;
}
return null;
}
public List<String> getFieldMask() {
return null;
}
public ApiMessage getApiMessageRequestBody() {
return null;
}
}
private static class FakeOperationMessage<
ResponseT extends ApiMessage, MetadataT extends ApiMessage>
implements ApiMessage {
private final String name;
private final ResponseT responseT;
private final MetadataT metadata;
public FakeOperationMessage(String name, ResponseT responseT, MetadataT metadata) {
this.name = name;
this.responseT = responseT;
this.metadata = metadata;
}
public Object getFieldValue(String fieldName) {
if ("name".equals(fieldName)) {
return name;
}
if ("responseT".equals(fieldName)) {
return responseT;
}
if ("metadata".equals(fieldName)) {
return metadata;
}
return null;
}
public List<String> getFieldMask() {
return null;
}
public ResponseT getApiMessageRequestBody() {
return responseT;
}
}
private static class OperationSnapshotImpl implements OperationSnapshot {
private final FakeOperationMessage operation;
public OperationSnapshotImpl(FakeOperationMessage operation) {
this.operation = operation;
}
@Override
public String getName() {
return (String) operation.getFieldValue("name");
}
@Override
public Object getMetadata() {
return operation.metadata;
}
@Override
public boolean isDone() {
return operation.metadata.getFieldValue("status") != Status.PENDING;
}
@Override
public Object getResponse() {
return operation.getApiMessageRequestBody();
}
@Override
public StatusCode getErrorCode() {
return HttpJsonStatusCode.of((Code) operation.metadata.getFieldValue("code"));
}
@Override
public String getErrorMessage() {
return ((Code) operation.metadata.getFieldValue("code")).name();
}
}
}