Is there a Java alternative to Ploeh's AutoFixture for .Net?

Question

I am looking for a Java tool that would create anonymous variables (variables whose value I don't care about) in my tests, similar to AutoFixture in .Net. Here is a link to AutoFixture's readme, which has pretty good examples of what it does.

Here is a short example taken from the same readme:

[TestMethod] public void IntroductoryTest() {     // Fixture setup     Fixture fixture = new Fixture();      int expectedNumber = fixture.CreateAnonymous<int>();     MyClass sut = fixture.CreateAnonymous<MyClass>();     // Exercise system     int result = sut.Echo(expectedNumber);     // Verify outcome     Assert.AreEqual<int>(expectedNumber, result, "Echo");     // Teardown } 

Is there such a tool in the Java world?

Edit:

I tried QuickCheck and while it managed to do something like what I was looking for:

import net.java.quickcheck.Generator; import net.java.quickcheck.generator.PrimitiveGenerators; import net.java.quickcheck.generator.support.ObjectGeneratorImpl;  public class Main {  interface Test{      String getTestValue(); }  public static void main(String[] args) {     Generator<String> stringGen = PrimitiveGenerators.strings(5, 100);     Generator<Integer> intGen = PrimitiveGenerators.integers(5, 20);      ObjectGeneratorImpl<Test> g = new ObjectGeneratorImpl<>(Test.class);     g.on(g.getRecorder().getTestValue()).returns(stringGen);       for (int i = 0; i < intGen.next(); i++) {         System.out.println("value of testValue is: " + g.next().getTestValue());     } }  } 

The tool seems to work only with interfaces. If I change Test to be a class and the method to a field, the generator throws an exception that only interfaces are supported.

I sincerely hope that there is something better, especially since the documentation is seriously lacking.

Answer 1

There's also JFixture which is available on github and published to maven central.

This is still under active development, and feature requests are being honoured.

Answer 2

Ivan,

I started a project focused on reimplementing core features of AutoFixture in java. AutoFixture has certainly a lot of features, so I need to prioritize which ones to implement first and which ones not to bother implementing at all. As the project is just started, I welcome testing, defect reports and feature requests.