1 files changed, 133 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/concurrent/ConstantInitializerTest.java b/src/test/java/org/apache/commons/lang3/concurrent/ConstantInitializerTest.java
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index 000000000..c296f056f
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+++ b/src/test/java/org/apache/commons/lang3/concurrent/ConstantInitializerTest.java
@@ -0,0 +1,133 @@
+/*
+ * 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.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang3.AbstractLangTest;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test class for {@code ConstantInitializer}.
+ */
+public class ConstantInitializerTest extends AbstractLangTest {
+    /** Constant for the object managed by the initializer. */
+    private static final Integer VALUE = 42;
+
+    /** The initializer to be tested. */
+    private ConstantInitializer<Integer> init;
+
+    @BeforeEach
+    public void setUp() {
+        init = new ConstantInitializer<>(VALUE);
+    }
+
+    /**
+     * Helper method for testing equals() and hashCode().
+     *
+     * @param obj the object to compare with the test instance
+     * @param expected the expected result
+     */
+    private void checkEquals(final Object obj, final boolean expected) {
+        assertEquals(expected, init.equals(obj), "Wrong result of equals");
+        if (obj != null) {
+            assertEquals(expected, obj.equals(init), "Not symmetric");
+            if (expected) {
+                assertEquals(init.hashCode(), obj.hashCode(), "Different hash codes");
+            }
+        }
+    }
+
+    /**
+     * Tests whether the correct object is returned.
+     */
+    @Test
+    public void testGetObject() {
+        assertEquals(VALUE, init.getObject(), "Wrong object");
+    }
+
+    /**
+     * Tests whether get() returns the correct object.
+     *
+     * @throws org.apache.commons.lang3.concurrent.ConcurrentException so we don't have to catch it
+     */
+    @Test
+    public void testGet() throws ConcurrentException {
+        assertEquals(VALUE, init.get(), "Wrong object");
+    }
+
+    /**
+     * Tests equals() if the expected result is true.
+     */
+    @Test
+    public void testEqualsTrue() {
+        checkEquals(init, true);
+        ConstantInitializer<Integer> init2 = new ConstantInitializer<>(
+                Integer.valueOf(VALUE.intValue()));
+        checkEquals(init2, true);
+        init = new ConstantInitializer<>(null);
+        init2 = new ConstantInitializer<>(null);
+        checkEquals(init2, true);
+    }
+
+    /**
+     * Tests equals() if the expected result is false.
+     */
+    @Test
+    public void testEqualsFalse() {
+        ConstantInitializer<Integer> init2 = new ConstantInitializer<>(
+                null);
+        checkEquals(init2, false);
+        init2 = new ConstantInitializer<>(VALUE + 1);
+        checkEquals(init2, false);
+    }
+
+    /**
+     * Tests equals() with objects of other classes.
+     */
+    @Test
+    public void testEqualsWithOtherObjects() {
+        checkEquals(null, false);
+        checkEquals(this, false);
+        checkEquals(new ConstantInitializer<>("Test"), false);
+    }
+
+    /**
+     * Tests the string representation.
+     */
+    @Test
+    public void testToString() {
+        final String s = init.toString();
+        final Pattern pattern = Pattern
+                .compile("ConstantInitializer@-?\\d+ \\[ object = " + VALUE
+                        + " \\]");
+        assertTrue(pattern.matcher(s).matches(), "Wrong string: " + s);
+    }
+
+    /**
+     * Tests the string representation if the managed object is null.
+     */
+    @Test
+    public void testToStringNull() {
+        final String s = new ConstantInitializer<>(null).toString();
+        assertTrue(s.indexOf("object = null") > 0, "Object not found: " + s);
+    }
+}