Dither

An implementation of t-way test case generation with IPOG (In-Parameter-Order-General).

Maven

Dither is in the Maven Central Repository.

<dependency>
	<groupId>com.github.jesg</groupId>
	<artifactId>dither</artifactId>
	<version>0.2.0</version>
	<scope>test</scope>
</dependency>

Usage

import com.github.jesg.dither.Dither;

...

// 2-way IPOG
Object[][] results2 = Dither.ipog(new Object[][] {
		new Object[] { 0, 1 },
        new Object[] { 0, 1 },
        new Object[] { true, false },
        new Object[] { "cat", "dog", "bird" }});

// 3-way IPOG
Object[][] results3 = Dither.ipog(3, new Object[][] {
		new Object[] { 0, 1 },
        new Object[] { 0, 1 },
        new Object[] { true, false },
        new Object[] { "cat", "dog", "bird" }});

// 3-way IPOG with constraints and exclude previously tested cases
Object[][] results3constraints = Dither.ipog(3, new Object[][] {
		new Object[] { 0, 1 },
        new Object[] { 0, 1 },
        new Object[] { true, false },
        new Object[] { "cat", "dog", "bird" }},
        new Integer[][]{
			new Integer[]{null, null, 0, 1}}, // exclude true dog combination
		new Object[][]{new Object[]{ 0, 0, true, "cat" }});  // previously tested cases


// 3-way AETG with constraints and exclude previously tested cases
// AETG is a non-deterministic pairwise strategy
Object[][] resultsAetg = Dither.aetg(3,
    0, // seed for random number generator, can be null
    new Object[][] {
		    new Object[] { 0, 1 },
        new Object[] { 0, 1 },
        new Object[] { true, false },
        new Object[] { "cat", "dog", "bird" }},
        new Integer[][]{
			new Integer[]{null, null, 0, 1}}, // exclude true dog combination
		new Object[][]{new Object[]{ 0, 0, true, "cat" }});  // previously tested cases
...

Note on Patches/Pull Requests

• Fork the project.
• Make your feature addition or bug fix.
• Add tests for it. This is important so I don't break it in a future version unintentionally.
• Commit, do not mess with pom.xml, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
• Send me a pull request. Bonus points for topic branches

Copyright

Apache License, Version 2.0 Copyright (c) 2015 Jason Gowan See LICENSE for details.