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/util/CollectionUtilsTest.java

@@ -0,0 +1,84 @@
+// 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.util;
+
+import static com.google.common.truth.Truth.assertThat;
+import static com.google.domain.registry.util.CollectionUtils.nullToEmpty;
+import static com.google.domain.registry.util.CollectionUtils.partitionMap;
+
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.domain.registry.testing.ExceptionRule;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import java.util.Map;
+
+/** Unit tests for {@link CollectionUtils} */
+@RunWith(MockitoJUnitRunner.class)
+public class CollectionUtilsTest {
+
+  @Rule
+  public final ExceptionRule thrown = new ExceptionRule();
+
+  @Test
+  public void testNullToEmptyMap_leavesNonNullAlone() {
+    Map<String, Integer> map = ImmutableMap.of("hello", 1);
+    assertThat(nullToEmpty(map)).isEqualTo(map);
+  }
+
+  @Test
+  public void testNullToEmptyMap_convertsNullToEmptyMap() {
+    Map<String, Integer> map = null;
+    Map<String, Integer> convertedMap = nullToEmpty(map);
+    assertThat(map).isNull();
+    assertThat(convertedMap).isNotNull();
+    assertThat(convertedMap).isEmpty();
+  }
+
+  @Test
+  public void testPartitionMap() {
+    Map<String, String> map = ImmutableMap.of("ka", "va", "kb", "vb", "kc", "vc");
+    assertThat(partitionMap(map, 2)).containsExactlyElementsIn(ImmutableList.of(
+        ImmutableMap.of("ka", "va", "kb", "vb"),
+        ImmutableMap.of("kc", "vc")));
+  }
+
+  @Test
+  public void testPartitionMap_emptyInput() {
+    assertThat(partitionMap(ImmutableMap.of(), 100)).isEmpty();
+  }
+
+  @Test
+  public void testPartitionMap_negativePartitionSize() {
+    thrown.expect(IllegalArgumentException.class);
+    partitionMap(ImmutableMap.of("A", "b"), -2);
+  }
+
+  @Test
+  public void testPartitionMap_nullMap() {
+    thrown.expect(NullPointerException.class);
+    partitionMap(null, 100);
+  }
+
+  @Test
+  public void testDeadCodeWeDontWantToDelete() throws Exception {
+    CollectionUtils.nullToEmpty(HashMultimap.create());
+  }
+}