AutoFixtureGenerator

An attempt to reimplement core features of a popular .NET anonymous value generator - AutoFixture - in Java

Maven pom

Maven xml pom can be obtained at: http://mvnrepository.com/artifact/com.github.autofixture/autofixturegenerator

Creating a fixture object

New fixture object:

Fixture fixture = new Fixture();

Creating instances

A value of non-generic class:

int number = fixture.create(int.class);
String text = fixture.create(String.class);

A value of generic class (including collections):

ArrayList<Integer> list = fixture.create(new InstanceOf<ArrayList<Integer>>() {});

Fixture customization

Customizations always take precedence over built-in generators.

Example of new integer generation customization that always returns 12:

f.register(new InstanceGenerator() {
    
  @Override
  public <T> boolean appliesTo(InstanceType<T> arg0) {
    return arg0.getRawType() == int.class;
  }
    
  @SuppressWarnings("unchecked")
  @Override
  public <T> T next(InstanceType<T> arg0, FixtureContract arg1) {
    return (T) Integer.valueOf(12);
  }

  @Override
  void setOmittingAutoProperties(boolean isOn) {}
});

Clearing all customizations:

fixture.clearCustomizations();

Any method helpers

Starting with version 0.3.0, new "any" method helpers are available.

two simple examples:

import static autofixture.publicinterface.*;
    
public class AnyGenerationMethodsSpecification {
  @Test
  public void shouldGenerateEachTimeDifferentString() {
    String str1 = Any.string();
    String str2 = Any.string();
    
    assertThat(str1, is(not(str2)));
  }
	  
  @Test
  public void shouldGenerateEachTimeDifferentInstance() {
    GenericObject<Integer> o1 = Any.anonymous(new InstanceOf<GenericObject<Integer>>() {});
    GenericObject<Integer> o2 = Any.anonumous(new InstanceOf<GenericObject<Integer>>() {});
      
    assertThat(o1, is(not(o2)));
  }
}

For more examples of this feature and syntax variants, see acceptance tests

Get more details at codescene.io.