Add basic unit tests

library/src/test/java/com/tom_roush/pdfbox/cos/TestCOSBase.java

@@ -0,0 +1,52 @@
+package com.tom_roush.pdfbox.cos;
+
+import junit.framework.TestCase;
+
+import java.io.IOException;
+
+/**
+ * Test class for {@link COSBase}.
+ */
+public abstract class TestCOSBase extends TestCase
+{
+	/** The COSBase abstraction of the object being tested. */
+	protected COSBase testCOSBase;
+
+	/**
+	 * Tests getCOSObject() - tests that the underlying object is returned.
+	 */
+	public void testGetCOSObject()
+	{
+		assertEquals(testCOSBase, testCOSBase.getCOSObject());
+	}
+
+	/**
+	 * Test accept() - tests the interface for visiting a document at the COS level.
+	 */
+	public abstract void testAccept() throws IOException;
+
+	/**
+	 * Tests isDirect() and setDirect() - tests the getter/setter methods.
+	 */
+	public void testIsSetDirect()
+	{
+		testCOSBase.setDirect(true);
+		assertTrue(testCOSBase.isDirect());
+		testCOSBase.setDirect(false);
+		assertFalse(testCOSBase.isDirect());
+	}
+
+	/**
+	 * A simple utility function to compare two byte arrays.
+	 * @param byteArr1 the expected byte array
+	 * @param byteArr2 the byte array being compared
+	 */
+	protected void testByteArrays(byte[] byteArr1, byte[] byteArr2)
+	{
+		assertEquals(byteArr1.length, byteArr1.length);
+		for (int i = 0; i < byteArr1.length; i++)
+		{
+			assertEquals(byteArr1[i], byteArr2[i]);
+		}
+	}
+}