moving unit tests from .testsuite -> .context

org.springframework.context/src/test/java/org/springframework/util/SerializationTestUtils.java

+/*
+ * The Spring Framework is published under the terms
+ * of the Apache Software License.
+ */
+
+package org.springframework.util;
+
+import java.awt.Point;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.NotSerializableException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.OutputStream;
+import java.io.Serializable;
+
+import junit.framework.TestCase;
+
+import org.springframework.beans.TestBean;
+
+/**
+ * Utilities for testing serializability of objects.
+ * Exposes static methods for use in other test cases.
+ * Extends TestCase only to test itself.
+ *
+ * @author Rod Johnson
+ */
+public class SerializationTestUtils extends TestCase {
+	
+	public static void testSerialization(Object o) throws IOException {
+		OutputStream baos = new ByteArrayOutputStream();
+		ObjectOutputStream oos = new ObjectOutputStream(baos);
+		oos.writeObject(o);
+	}
+	
+	public static boolean isSerializable(Object o) throws IOException {
+		try {
+			testSerialization(o);
+			return true;
+		}
+		catch (NotSerializableException ex) {
+			return false;
+		}
+	}
+	
+	public static Object serializeAndDeserialize(Object o) throws IOException, ClassNotFoundException {
+		ByteArrayOutputStream baos = new ByteArrayOutputStream();
+		ObjectOutputStream oos = new ObjectOutputStream(baos);
+		oos.writeObject(o);
+		oos.flush();
+		baos.flush();
+		byte[] bytes = baos.toByteArray();
+		
+		ByteArrayInputStream is = new ByteArrayInputStream(bytes);
+		ObjectInputStream ois = new ObjectInputStream(is);
+		Object o2 = ois.readObject();
+		
+		return o2;
+	}
+	
+	public SerializationTestUtils(String s) {
+		super(s);
+	}
+	
+	public void testWithNonSerializableObject() throws IOException {
+		TestBean o = new TestBean();
+		assertFalse(o instanceof Serializable);
+		
+		assertFalse(isSerializable(o));
+		
+		try {
+			testSerialization(o);
+			fail();
+		}
+		catch (NotSerializableException ex) {
+			// Ok
+		}
+	}
+	
+	public void testWithSerializableObject() throws Exception {
+		int x = 5;
+		int y = 10;
+		Point p = new Point(x, y);
+		assertTrue(p instanceof Serializable);
+	
+		testSerialization(p);
+		
+		assertTrue(isSerializable(p));
+		
+		Point p2 = (Point) serializeAndDeserialize(p);
+		assertNotSame(p, p2);
+		assertEquals(x, (int) p2.getX());
+		assertEquals(y, (int) p2.getY());
+	}
+
+}