Add ConverterTest

Add a test class for individual converters. Currently only the
NullConverter is tested, as testing the DefaultConverter would
effectively be replicating all of the ConvertService test.

Author: hinerm

src/test/java/org/scijava/convert/ConverterTest.java

@@ -0,0 +1,74 @@
+/*
+ * #%L
+ * SciJava Common shared library for SciJava software.
+ * %%
+ * Copyright (C) 2009 - 2014 Board of Regents of the University of
+ * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
+ * Institute of Molecular Cell Biology and Genetics.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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+ * #L%
+ */
+
+package org.scijava.convert;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+
+import org.junit.Test;
+
+/**
+ * Tests individual {@link Converter}s.
+ * <p>
+ * TODO: Consider splitting up the {@link DefaultConverter} into component parts
+ * and testing each individually. As is, the {@code DefaultConverter} is a bit
+ * monolithic to test (without duplicating all of the ConvertServiceTest).
+ * </p>
+ *
+ * @author Mark Hiner
+ */
+public class ConverterTest {
+
+	/**
+	 * Test case for the {@link NullConverter}
+	 */
+	@SuppressWarnings("deprecation")
+	@Test
+	public void testNullConverter() {
+		final NullConverter nc = new NullConverter();
+		assertFalse(nc.canConvert(Object.class, Object.class));
+		assertFalse(nc.canConvert(Object.class, (Type) Object.class));
+		assertFalse(nc.canConvert((Class<?>) null, Object.class));
+		assertTrue(nc.canConvert((Object) null, Object.class));
+		assertTrue(nc.canConvert((ConverterTest) null, ArrayList.class));
+		assertNull(nc.convert((Object) null, Object.class));
+		assertNull(nc.convert((Class<Object>) null, Object.class));
+		assertNull(nc.convert(Object.class, (Class<Object>) null));
+		assertNull(nc.convert(Object.class, (Type) null));
+		assertNull(nc.convert(new Object(), (Class<Object>) null));
+		assertNull(nc.convert(new Object(), (Type) null));
+	}
+}