1 files changed, 368 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/SerializationUtilsTest.java b/src/test/java/org/apache/commons/lang3/SerializationUtilsTest.java
new file mode 100644
index 000000000..f31610343
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+++ b/src/test/java/org/apache/commons/lang3/SerializationUtilsTest.java
@@ -0,0 +1,368 @@
+/*
+ * 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;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.OutputStream;
+import java.io.Serializable;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Modifier;
+import java.util.HashMap;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Unit tests {@link org.apache.commons.lang3.SerializationUtils}.
+ */
+public class SerializationUtilsTest extends AbstractLangTest {
+
+  static final String CLASS_NOT_FOUND_MESSAGE = "ClassNotFoundSerialization.readObject fake exception";
+    protected static final String SERIALIZE_IO_EXCEPTION_MESSAGE = "Anonymous OutputStream I/O exception";
+
+    private String iString;
+    private Integer iInteger;
+    private HashMap<Object, Object> iMap;
+
+    @BeforeEach
+    public void setUp() {
+        iString = "foo";
+        iInteger = Integer.valueOf(7);
+        iMap = new HashMap<>();
+        iMap.put("FOO", iString);
+        iMap.put("BAR", iInteger);
+    }
+
+
+    @Test
+    public void testConstructor() {
+        assertNotNull(new SerializationUtils());
+        final Constructor<?>[] cons = SerializationUtils.class.getDeclaredConstructors();
+        assertEquals(1, cons.length);
+        assertTrue(Modifier.isPublic(cons[0].getModifiers()));
+        assertTrue(Modifier.isPublic(SerializationUtils.class.getModifiers()));
+        assertFalse(Modifier.isFinal(SerializationUtils.class.getModifiers()));
+    }
+
+    @Test
+    public void testException() {
+        SerializationException serEx;
+        final Exception ex = new Exception();
+
+        serEx = new SerializationException();
+        assertSame(null, serEx.getMessage());
+        assertSame(null, serEx.getCause());
+
+        serEx = new SerializationException("Message");
+        assertSame("Message", serEx.getMessage());
+        assertSame(null, serEx.getCause());
+
+        serEx = new SerializationException(ex);
+        assertEquals("java.lang.Exception", serEx.getMessage());
+        assertSame(ex, serEx.getCause());
+
+        serEx = new SerializationException("Message", ex);
+        assertSame("Message", serEx.getMessage());
+        assertSame(ex, serEx.getCause());
+    }
+
+
+    @Test
+    public void testSerializeStream() throws Exception {
+        final ByteArrayOutputStream streamTest = new ByteArrayOutputStream();
+        SerializationUtils.serialize(iMap, streamTest);
+
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(iMap);
+            oos.flush();
+        }
+
+        final byte[] testBytes = streamTest.toByteArray();
+        final byte[] realBytes = streamReal.toByteArray();
+        assertEquals(testBytes.length, realBytes.length);
+        assertArrayEquals(realBytes, testBytes);
+    }
+
+    @Test
+    public void testSerializeStreamUnserializable() {
+        final ByteArrayOutputStream streamTest = new ByteArrayOutputStream();
+        iMap.put(new Object(), new Object());
+        assertThrows(SerializationException.class, () -> SerializationUtils.serialize(iMap, streamTest));
+    }
+
+    @Test
+    public void testSerializeStreamNullObj() throws Exception {
+        final ByteArrayOutputStream streamTest = new ByteArrayOutputStream();
+        SerializationUtils.serialize(null, streamTest);
+
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(null);
+            oos.flush();
+        }
+
+        final byte[] testBytes = streamTest.toByteArray();
+        final byte[] realBytes = streamReal.toByteArray();
+        assertEquals(testBytes.length, realBytes.length);
+        assertArrayEquals(realBytes, testBytes);
+    }
+
+    @Test
+    public void testSerializeStreamObjNull() {
+        assertThrows(NullPointerException.class, () -> SerializationUtils.serialize(iMap, null));
+    }
+
+    @Test
+    public void testSerializeStreamNullNull() {
+        assertThrows(NullPointerException.class, () -> SerializationUtils.serialize(null, null));
+    }
+
+    @Test
+    public void testSerializeIOException() {
+        // forces an IOException when the ObjectOutputStream is created, to test not closing the stream
+        // in the finally block
+        final OutputStream streamTest = new OutputStream() {
+            @Override
+            public void write(final int arg0) throws IOException {
+                throw new IOException(SERIALIZE_IO_EXCEPTION_MESSAGE);
+            }
+        };
+        final SerializationException e =
+                assertThrows(SerializationException.class, () -> SerializationUtils.serialize(iMap, streamTest));
+        assertEquals("java.io.IOException: " + SERIALIZE_IO_EXCEPTION_MESSAGE, e.getMessage());
+    }
+
+
+    @Test
+    public void testDeserializeStream() throws Exception {
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(iMap);
+            oos.flush();
+        }
+
+        final ByteArrayInputStream inTest = new ByteArrayInputStream(streamReal.toByteArray());
+        final Object test = SerializationUtils.deserialize(inTest);
+        assertNotNull(test);
+        assertTrue(test instanceof HashMap<?, ?>);
+        assertNotSame(test, iMap);
+        final HashMap<?, ?> testMap = (HashMap<?, ?>) test;
+        assertEquals(iString, testMap.get("FOO"));
+        assertNotSame(iString, testMap.get("FOO"));
+        assertEquals(iInteger, testMap.get("BAR"));
+        assertNotSame(iInteger, testMap.get("BAR"));
+        assertEquals(iMap, testMap);
+    }
+
+    @Test
+    public void testDeserializeClassCastException() {
+        final String value = "Hello";
+        final byte[] serialized = SerializationUtils.serialize(value);
+        assertEquals(value, SerializationUtils.deserialize(serialized));
+        assertThrows(ClassCastException.class, () -> {
+            // Causes ClassCastException in call site, not in SerializationUtils.deserialize
+            @SuppressWarnings("unused") // needed to cause Exception
+            final Integer i = SerializationUtils.deserialize(serialized);
+        });
+    }
+
+    @Test
+    public void testDeserializeStreamOfNull() throws Exception {
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(null);
+            oos.flush();
+        }
+
+        final ByteArrayInputStream inTest = new ByteArrayInputStream(streamReal.toByteArray());
+        final Object test = SerializationUtils.deserialize(inTest);
+        assertNull(test);
+    }
+
+    @Test
+    public void testDeserializeStreamNull() {
+        assertThrows(NullPointerException.class, () -> SerializationUtils.deserialize((InputStream) null));
+    }
+
+    @Test
+    public void testDeserializeStreamBadStream() {
+        assertThrows(SerializationException.class,
+                () -> SerializationUtils.deserialize(new ByteArrayInputStream(new byte[0])));
+    }
+
+    @Test
+    public void testDeserializeStreamClassNotFound() throws Exception {
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(new ClassNotFoundSerialization());
+            oos.flush();
+        }
+
+        final ByteArrayInputStream inTest = new ByteArrayInputStream(streamReal.toByteArray());
+        final SerializationException se = assertThrows(SerializationException.class, () -> SerializationUtils.deserialize(inTest));
+        assertEquals("java.lang.ClassNotFoundException: " + CLASS_NOT_FOUND_MESSAGE, se.getMessage());
+    }
+
+    @Test
+    public void testRoundtrip() {
+        final HashMap<Object, Object> newMap = SerializationUtils.roundtrip(iMap);
+        assertEquals(iMap, newMap);
+    }
+
+    @Test
+    public void testSerializeBytes() throws Exception {
+        final byte[] testBytes = SerializationUtils.serialize(iMap);
+
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(iMap);
+            oos.flush();
+        }
+
+        final byte[] realBytes = streamReal.toByteArray();
+        assertEquals(testBytes.length, realBytes.length);
+        assertArrayEquals(realBytes, testBytes);
+    }
+
+    @Test
+    public void testSerializeBytesUnserializable() {
+        iMap.put(new Object(), new Object());
+        assertThrows(SerializationException.class, () -> SerializationUtils.serialize(iMap));
+    }
+
+    @Test
+    public void testSerializeBytesNull() throws Exception {
+        final byte[] testBytes = SerializationUtils.serialize(null);
+
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(null);
+            oos.flush();
+        }
+
+        final byte[] realBytes = streamReal.toByteArray();
+        assertEquals(testBytes.length, realBytes.length);
+        assertArrayEquals(realBytes, testBytes);
+    }
+
+
+    @Test
+    public void testDeserializeBytes() throws Exception {
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(iMap);
+            oos.flush();
+        }
+
+        final Object test = SerializationUtils.deserialize(streamReal.toByteArray());
+        assertNotNull(test);
+        assertTrue(test instanceof HashMap<?, ?>);
+        assertNotSame(test, iMap);
+        final HashMap<?, ?> testMap = (HashMap<?, ?>) test;
+        assertEquals(iString, testMap.get("FOO"));
+        assertNotSame(iString, testMap.get("FOO"));
+        assertEquals(iInteger, testMap.get("BAR"));
+        assertNotSame(iInteger, testMap.get("BAR"));
+        assertEquals(iMap, testMap);
+    }
+
+    @Test
+    public void testDeserializeBytesOfNull() throws Exception {
+        final ByteArrayOutputStream streamReal = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(streamReal)) {
+            oos.writeObject(null);
+            oos.flush();
+        }
+
+        final Object test = SerializationUtils.deserialize(streamReal.toByteArray());
+        assertNull(test);
+    }
+
+    @Test
+    public void testDeserializeBytesNull() {
+        assertThrows(NullPointerException.class, () -> SerializationUtils.deserialize((byte[]) null));
+    }
+
+    @Test
+    public void testDeserializeBytesBadStream() {
+        assertThrows(SerializationException.class, () -> SerializationUtils.deserialize(new byte[0]));
+    }
+
+
+    @Test
+    public void testClone() {
+        final Object test = SerializationUtils.clone(iMap);
+        assertNotNull(test);
+        assertTrue(test instanceof HashMap<?, ?>);
+        assertNotSame(test, iMap);
+        final HashMap<?, ?> testMap = (HashMap<?, ?>) test;
+        assertEquals(iString, testMap.get("FOO"));
+        assertNotSame(iString, testMap.get("FOO"));
+        assertEquals(iInteger, testMap.get("BAR"));
+        assertNotSame(iInteger, testMap.get("BAR"));
+        assertEquals(iMap, testMap);
+    }
+
+    @Test
+    public void testCloneNull() {
+        final Object test = SerializationUtils.clone(null);
+        assertNull(test);
+    }
+
+    @Test
+    public void testCloneUnserializable() {
+        iMap.put(new Object(), new Object());
+        assertThrows(SerializationException.class, () -> SerializationUtils.clone(iMap));
+    }
+
+    @Test
+    public void testPrimitiveTypeClassSerialization() {
+        final Class<?>[] primitiveTypes = { byte.class, short.class, int.class, long.class, float.class, double.class,
+                boolean.class, char.class, void.class };
+
+        for (final Class<?> primitiveType : primitiveTypes) {
+            final Class<?> clone = SerializationUtils.clone(primitiveType);
+            assertEquals(primitiveType, clone);
+        }
+    }
+
+}
+
+class ClassNotFoundSerialization implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    private void readObject(final ObjectInputStream in) throws ClassNotFoundException    {
+        throw new ClassNotFoundException(SerializationUtilsTest.CLASS_NOT_FOUND_MESSAGE);
+    }
+}