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// Copyright (C) 2021 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.cancellation;
import static com.google.common.truth.Truth.assertThat;
import static com.google.gerrit.testing.GerritJUnit.assertThrows;
import com.google.common.collect.ImmutableSet;
import com.google.gerrit.server.cancellation.RequestStateContext.NonCancellableOperationContext;
import org.junit.Test;
public class RequestStateContextTest {
@Test
public void openContext() {
assertNoRequestStateProviders();
RequestStateProvider requestStateProvider1 = new TestRequestStateProvider();
try (RequestStateContext requestStateContext =
RequestStateContext.open().addRequestStateProvider(requestStateProvider1)) {
RequestStateProvider requestStateProvider2 = new TestRequestStateProvider();
requestStateContext.addRequestStateProvider(requestStateProvider2);
assertRequestStateProviders(ImmutableSet.of(requestStateProvider1, requestStateProvider2));
}
assertNoRequestStateProviders();
}
@Test
public void openNestedContexts() {
assertNoRequestStateProviders();
RequestStateProvider requestStateProvider1 = new TestRequestStateProvider();
try (RequestStateContext requestStateContext =
RequestStateContext.open().addRequestStateProvider(requestStateProvider1)) {
RequestStateProvider requestStateProvider2 = new TestRequestStateProvider();
requestStateContext.addRequestStateProvider(requestStateProvider2);
assertRequestStateProviders(ImmutableSet.of(requestStateProvider1, requestStateProvider2));
RequestStateProvider requestStateProvider3 = new TestRequestStateProvider();
try (RequestStateContext requestStateContext2 =
RequestStateContext.open().addRequestStateProvider(requestStateProvider3)) {
RequestStateProvider requestStateProvider4 = new TestRequestStateProvider();
requestStateContext2.addRequestStateProvider(requestStateProvider4);
assertRequestStateProviders(
ImmutableSet.of(
requestStateProvider1,
requestStateProvider2,
requestStateProvider3,
requestStateProvider4));
}
assertRequestStateProviders(ImmutableSet.of(requestStateProvider1, requestStateProvider2));
}
assertNoRequestStateProviders();
}
@Test
public void openNestedContextsWithSameRequestStateProviders() {
assertNoRequestStateProviders();
RequestStateProvider requestStateProvider1 = new TestRequestStateProvider();
try (RequestStateContext requestStateContext =
RequestStateContext.open().addRequestStateProvider(requestStateProvider1)) {
RequestStateProvider requestStateProvider2 = new TestRequestStateProvider();
requestStateContext.addRequestStateProvider(requestStateProvider2);
assertRequestStateProviders(ImmutableSet.of(requestStateProvider1, requestStateProvider2));
try (RequestStateContext requestStateContext2 =
RequestStateContext.open().addRequestStateProvider(requestStateProvider1)) {
requestStateContext2.addRequestStateProvider(requestStateProvider2);
assertRequestStateProviders(ImmutableSet.of(requestStateProvider1, requestStateProvider2));
}
assertRequestStateProviders(ImmutableSet.of(requestStateProvider1, requestStateProvider2));
}
assertNoRequestStateProviders();
}
@Test
public void abortIfCancelled_noRequestStateProvider() {
assertNoRequestStateProviders();
// Calling abortIfCancelled() shouldn't throw an exception.
RequestStateContext.abortIfCancelled();
}
@Test
public void abortIfCancelled_requestNotCancelled() {
try (RequestStateContext requestStateContext =
RequestStateContext.open()
.addRequestStateProvider(
new RequestStateProvider() {
@Override
public void checkIfCancelled(OnCancelled onCancelled) {}
})) {
// Calling abortIfCancelled() shouldn't throw an exception.
RequestStateContext.abortIfCancelled();
}
}
@Test
public void abortIfCancelled_requestCancelled() {
try (RequestStateContext requestStateContext =
RequestStateContext.open()
.addRequestStateProvider(
new RequestStateProvider() {
@Override
public void checkIfCancelled(OnCancelled onCancelled) {
onCancelled.onCancel(
RequestStateProvider.Reason.CLIENT_CLOSED_REQUEST, /* message= */ null);
}
})) {
RequestCancelledException requestCancelledException =
assertThrows(
RequestCancelledException.class, () -> RequestStateContext.abortIfCancelled());
assertThat(requestCancelledException)
.hasMessageThat()
.isEqualTo("Request cancelled: CLIENT_CLOSED_REQUEST");
assertThat(requestCancelledException.getCancellationReason())
.isEqualTo(RequestStateProvider.Reason.CLIENT_CLOSED_REQUEST);
assertThat(requestCancelledException.getCancellationMessage()).isEmpty();
}
}
@Test
public void abortIfCancelled_requestCancelled_withMessage() {
try (RequestStateContext requestStateContext =
RequestStateContext.open()
.addRequestStateProvider(
new RequestStateProvider() {
@Override
public void checkIfCancelled(OnCancelled onCancelled) {
onCancelled.onCancel(
RequestStateProvider.Reason.SERVER_DEADLINE_EXCEEDED, "deadline = 10m");
}
})) {
RequestCancelledException requestCancelledException =
assertThrows(
RequestCancelledException.class, () -> RequestStateContext.abortIfCancelled());
assertThat(requestCancelledException)
.hasMessageThat()
.isEqualTo("Request cancelled: SERVER_DEADLINE_EXCEEDED (deadline = 10m)");
assertThat(requestCancelledException.getCancellationReason())
.isEqualTo(RequestStateProvider.Reason.SERVER_DEADLINE_EXCEEDED);
assertThat(requestCancelledException.getCancellationMessage()).hasValue("deadline = 10m");
}
}
@Test
public void nonCancellableOperation_requestNotCanclled() {
try (RequestStateContext requestStateContext =
RequestStateContext.open()
.addRequestStateProvider(
new RequestStateProvider() {
@Override
public void checkIfCancelled(OnCancelled onCancelled) {}
})) {
// Calling abortIfCancelled() shouldn't throw an exception.
RequestStateContext.abortIfCancelled();
try (NonCancellableOperationContext nonCancellableOperationContext =
RequestStateContext.startNonCancellableOperation()) {
// Calling abortIfCancelled() shouldn't throw an exception.
RequestStateContext.abortIfCancelled();
}
// Calling abortIfCancelled() shouldn't throw an exception.
RequestStateContext.abortIfCancelled();
}
}
@Test
public void nonCancellableOperationNotAborted() {
try (RequestStateContext requestStateContext =
RequestStateContext.open()
.addRequestStateProvider(
new RequestStateProvider() {
@Override
public void checkIfCancelled(OnCancelled onCancelled) {
onCancelled.onCancel(
RequestStateProvider.Reason.CLIENT_CLOSED_REQUEST, /* message= */ null);
}
})) {
assertThrows(RequestCancelledException.class, () -> RequestStateContext.abortIfCancelled());
boolean cancelledOnClose = false;
try (NonCancellableOperationContext nonCancellableOperationContext =
RequestStateContext.startNonCancellableOperation()) {
// Calling abortIfCancelled() shouldn't throw an exception since we are within a
// non-cancellable operation.
RequestStateContext.abortIfCancelled();
} catch (RequestCancelledException e) {
// The request is expected to get aborted on close of the non-cancellable operation.
cancelledOnClose = true;
}
assertThat(cancelledOnClose).isTrue();
}
}
@Test
public void nestedNonCancellableOperationNotAborted() {
try (RequestStateContext requestStateContext =
RequestStateContext.open()
.addRequestStateProvider(
new RequestStateProvider() {
@Override
public void checkIfCancelled(OnCancelled onCancelled) {
onCancelled.onCancel(
RequestStateProvider.Reason.CLIENT_CLOSED_REQUEST, /* message= */ null);
}
})) {
assertThrows(RequestCancelledException.class, () -> RequestStateContext.abortIfCancelled());
boolean cancelledOnClose = false;
try (NonCancellableOperationContext nonCancellableOperationContext =
RequestStateContext.startNonCancellableOperation()) {
// Calling abortIfCancelled() shouldn't throw an exception since we are within a
// non-cancellable operation.
RequestStateContext.abortIfCancelled();
try (NonCancellableOperationContext nestedNonCancellableOperationContext =
RequestStateContext.startNonCancellableOperation()) {
// Calling abortIfCancelled() shouldn't throw an exception since we are within a
// non-cacellable operation.
RequestStateContext.abortIfCancelled();
// Close of the nestedNonCancellableOperationContext shouldn't throw an exception since
// the outer nonCancellableOperationContext is still open.
}
// Calling abortIfCancelled() shouldn't throw an exception since we are within a
// non-cancellable operation.
RequestStateContext.abortIfCancelled();
} catch (RequestCancelledException e) {
// The request is expected to get aborted on close of the non-cancellable operation.
cancelledOnClose = true;
}
assertThat(cancelledOnClose).isTrue();
}
}
private void assertNoRequestStateProviders() {
assertRequestStateProviders(ImmutableSet.of());
}
private void assertRequestStateProviders(
ImmutableSet<RequestStateProvider> expectedRequestStateProviders) {
assertThat(RequestStateContext.getRequestStateProviders())
.containsExactlyElementsIn(expectedRequestStateProviders);
}
private static class TestRequestStateProvider implements RequestStateProvider {
@Override
public void checkIfCancelled(OnCancelled onCancelled) {}
}
}