Add unit tests for POM#compareVersions method

Author: ctrueden

src/test/java/org/scijava/util/POMTest.java

@@ -0,0 +1,76 @@
+/*
+ * #%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
+ * POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+
+package org.scijava.util;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+/**
+ * Tests methods of {@link POM}.
+ * 
+ * @author Curtis Rueden
+ */
+public class POMTest {
+
+	@Test
+	public void testCompareVersions() {
+		// basic checks
+		assertTrue(POM.compareVersions("1", "2") < 0);
+		assertTrue(POM.compareVersions("1.0", "2.0") < 0);
+		assertTrue(POM.compareVersions("1.0", "1.1") < 0);
+		assertTrue(POM.compareVersions("1.0.0", "2.0.0") < 0);
+
+		// sanity checks for argument order
+		assertTrue(POM.compareVersions("2", "1") > 0);
+		assertTrue(POM.compareVersions("2.0", "1.0") > 0);
+		assertTrue(POM.compareVersions("1.1", "1.0") > 0);
+		assertTrue(POM.compareVersions("2.0.0", "1.0.0") > 0);
+
+		// more complex/unusual checks
+		assertTrue(POM.compareVersions("1.0-RC1", "1.0-RC2") < 0);
+		assertTrue(POM.compareVersions("1.0-RC-1", "1.0-RC-2") < 0);
+		assertTrue(POM.compareVersions("1.0-RC-2", "1.0-RC-10") < 0);
+		assertTrue(POM.compareVersions("0.4-alpha", "0.4-beta") < 0);
+		assertTrue(POM.compareVersions("foo", "bar") > 0);
+
+		// checks which expose bugs/limitations
+		assertTrue(POM.compareVersions("1.0-RC2", "1.0-RC10") > 0);
+		assertTrue(POM.compareVersions("1.0-rc1", "1.0-RC2") > 0);
+
+		// check that varying numbers of digits are handled properly
+		assertTrue(POM.compareVersions("2.0.0", "2.0.0.1") < 0);
+		// check that SemVer prerelease versions are handled properly
+		assertTrue(POM.compareVersions("2.0.0", "2.0.0-beta-1") > 0);
+	}
+
+}