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JavaFixture is the attempt to bring Mark Seemann's AutoFixture for .NET to the Java world. Its purpose is to generate full object graphs for use in test suites with a fluent API for customising the test objects during generation.

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package com.github.nylle.javafixture;

import java.util.Collection;
import java.util.stream.Collectors;
import java.util.stream.Stream;


public class JavaFixture {

    private final SpecimenBuilderProvider provider;

    public JavaFixture() {
        this(new Configuration());
    }

    public JavaFixture(Configuration configuration) {
        this.provider = new SpecimenBuilderProvider(configuration);
    }

    public  T create(Class typeReference) {
        var specimenBuilder = provider.newBuilder(typeReference);
        return specimenBuilder.create();
    }

    public  Stream createMany(Class typeReference) {
        var specimenBuilder = provider.newBuilder(typeReference);
        return specimenBuilder.createMany();
    }

    public  ISpecimenBuilder build(Class typeReference) {
        return provider.newBuilder(typeReference);
    }

    public  void addManyTo(Collection result, Class typeReference) {
        var specimenBuilder = provider.newBuilder(typeReference);
        result.addAll(specimenBuilder.createMany().collect(Collectors.toList()));
    }
}