mv com/google/domain/registry google/registry

This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.

javatests/google/registry/model/server/LockTest.java

@@ -0,0 +1,113 @@
+// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
+//
+// 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.domain.registry.model.server;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.domain.registry.model.ofy.Ofy;
+import com.google.domain.registry.testing.AppEngineRule;
+import com.google.domain.registry.testing.ExceptionRule;
+import com.google.domain.registry.testing.FakeClock;
+import com.google.domain.registry.testing.InjectRule;
+
+import org.joda.time.Duration;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link Lock}. */
+@RunWith(JUnit4.class)
+public class LockTest {
+
+  private static final String RESOURCE_NAME = "foo";
+  private static final Duration ONE_DAY = Duration.standardDays(1);
+  private static final Duration TWO_MILLIS = Duration.millis(2);
+
+  @Rule
+  public final AppEngineRule appEngine = AppEngineRule.builder()
+      .withDatastore()
+      .build();
+
+  @Rule
+  public final InjectRule inject = new InjectRule();
+
+  @Rule
+  public final ExceptionRule thrown = new ExceptionRule();
+
+  @Test
+  public void testReleasedExplicitly() throws Exception {
+    Lock lock = Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY);
+    assertThat(lock).isNotNull();
+    // We can't get it again at the same time.
+    assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY)).isNull();
+    // But if we release it, it's available.
+    lock.release();
+    assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY)).isNotNull();
+  }
+
+  @Test
+  public void testReleasedAfterTimeout() throws Exception {
+    FakeClock clock = new FakeClock();
+    inject.setStaticField(Ofy.class, "clock", clock);
+    assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
+    // We can't get it again at the same time.
+    assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNull();
+    // A second later we still can't get the lock.
+    clock.advanceOneMilli();
+    assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNull();
+    // But two seconds later we can get it.
+    clock.advanceOneMilli();
+    assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
+  }
+
+  @Test
+  public void testTldsAreIndependent() throws Exception {
+    Lock lockA = Lock.acquire(getClass(), RESOURCE_NAME, "a", ONE_DAY);
+    assertThat(lockA).isNotNull();
+    // For a different tld we can still get a lock with the same name.
+    Lock lockB = Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY);
+    assertThat(lockB).isNotNull();
+    // We can't get lockB again at the same time.
+    assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY)).isNull();
+    // Releasing lockA has no effect on lockB (even though we are still using the "b" tld).
+    lockA.release();
+    assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY)).isNull();
+  }
+
+  @Test
+  public void testQueueing() throws Exception {
+    // This should work... there's nothing on the queue.
+    Lock lock = Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS);
+    assertThat(lock).isNotNull();
+    lock.release();
+    // Queue up a request from "Object".
+    Lock.joinQueue(Object.class, RESOURCE_NAME, "");
+    // We can't get the lock because the "requester" is different than what's on the queue.
+    assertThat(Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS)).isNull();
+    // But this will work because the requester is the same as what's on the queue.
+    lock = Lock.acquire(Object.class, RESOURCE_NAME, "", TWO_MILLIS);
+    assertThat(lock).isNotNull();
+    lock.release();
+    // Now the queue is empty again so we can get the lock.
+    assertThat(Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
+  }
+
+  @Test
+  public void testFailure_emptyResourceName() throws Exception {
+    thrown.expect(IllegalArgumentException.class, "resourceName cannot be null or empty");
+    Lock.acquire(String.class, "", "", TWO_MILLIS);
+  }
+}