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112 lines
4.4 KiB
Java
112 lines
4.4 KiB
Java
// Copyright 2016 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.model.server;
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import static com.google.common.truth.Truth.assertThat;
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import google.registry.model.ofy.Ofy;
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import google.registry.testing.AppEngineRule;
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import google.registry.testing.ExceptionRule;
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import google.registry.testing.FakeClock;
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import google.registry.testing.InjectRule;
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import org.joda.time.Duration;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.JUnit4;
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/** Unit tests for {@link Lock}. */
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@RunWith(JUnit4.class)
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public class LockTest {
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private static final String RESOURCE_NAME = "foo";
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private static final Duration ONE_DAY = Duration.standardDays(1);
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private static final Duration TWO_MILLIS = Duration.millis(2);
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@Rule
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public final AppEngineRule appEngine = AppEngineRule.builder()
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.withDatastore()
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.build();
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@Rule
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public final InjectRule inject = new InjectRule();
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@Rule
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public final ExceptionRule thrown = new ExceptionRule();
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@Test
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public void testReleasedExplicitly() throws Exception {
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Lock lock = Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY);
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assertThat(lock).isNotNull();
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// We can't get it again at the same time.
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY)).isNull();
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// But if we release it, it's available.
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lock.release();
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY)).isNotNull();
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}
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@Test
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public void testReleasedAfterTimeout() throws Exception {
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FakeClock clock = new FakeClock();
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inject.setStaticField(Ofy.class, "clock", clock);
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
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// We can't get it again at the same time.
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNull();
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// A second later we still can't get the lock.
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clock.advanceOneMilli();
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNull();
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// But two seconds later we can get it.
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clock.advanceOneMilli();
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
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}
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@Test
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public void testTldsAreIndependent() throws Exception {
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Lock lockA = Lock.acquire(getClass(), RESOURCE_NAME, "a", ONE_DAY);
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assertThat(lockA).isNotNull();
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// For a different tld we can still get a lock with the same name.
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Lock lockB = Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY);
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assertThat(lockB).isNotNull();
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// We can't get lockB again at the same time.
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY)).isNull();
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// Releasing lockA has no effect on lockB (even though we are still using the "b" tld).
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lockA.release();
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY)).isNull();
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}
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@Test
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public void testQueueing() throws Exception {
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// This should work... there's nothing on the queue.
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Lock lock = Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS);
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assertThat(lock).isNotNull();
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lock.release();
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// Queue up a request from "Object".
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Lock.joinQueue(Object.class, RESOURCE_NAME, "");
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// We can't get the lock because the "requester" is different than what's on the queue.
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assertThat(Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS)).isNull();
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// But this will work because the requester is the same as what's on the queue.
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lock = Lock.acquire(Object.class, RESOURCE_NAME, "", TWO_MILLIS);
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assertThat(lock).isNotNull();
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lock.release();
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// Now the queue is empty again so we can get the lock.
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assertThat(Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
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}
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@Test
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public void testFailure_emptyResourceName() throws Exception {
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thrown.expect(IllegalArgumentException.class, "resourceName cannot be null or empty");
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Lock.acquire(String.class, "", "", TWO_MILLIS);
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}
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}
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