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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);
	}

}

Add unit tests for POM#compareVersions method