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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.commons.lang3.concurrent;
+
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test class for {@code AtomicInitializer}.
+ */
+public class AtomicInitializerObjectTest extends AbstractConcurrentInitializerTest<Object> {
+
+ /**
+ * Returns the initializer to be tested.
+ *
+ * @return the {@code AtomicInitializer}
+ */
+ @Override
+ protected ConcurrentInitializer<Object> createInitializer() {
+ return new AtomicInitializer<Object>() {
+ @Override
+ protected Object initialize() {
+ return new Object();
+ }
+ };
+ }
+
+ @Test
+ public void testGetThatReturnsNullFirstTime() throws ConcurrentException {
+ final AtomicInitializer<Object> initializer = new AtomicInitializer<Object>() {
+ final AtomicBoolean firstRun = new AtomicBoolean(true);
+
+ @Override
+ protected Object initialize() {
+ if (firstRun.getAndSet(false)) {
+ return null;
+ }
+ return new Object();
+ }
+ };
+
+ assertNull(initializer.get());
+ assertNull(initializer.get());
+ }
+}