Builder pattern for test fixtures

AddressBuilder.java

public class AddressBuilder {                                     

    public static AddressBuilder anAddress(){
        return new AddressBuilder();
    }

    @Override
    public Address build() {
        Address address = new Address();
        // ... set fields, you get the idea
        return address;
    }

}

DontDoThisPersonBuilder.java

public Person build(){                                         
    Person person = new Person();
    person.addAddresses(this.addresses);
    return person;
}

PersonBuilder.java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class PersonBuilder {

    private String firstName = "Ben";
    private String lastName = "Verbeken";
    private List<Address> addresses = new ArrayList<Address>();

    public static PersonBuilder aPerson() {
        return new PersonBuilder();
    }

    @Override
    public Person build() {
        Person person = new Person();
        person.setFirstName(this.firstName);
        person.setLastName(this.lastName);
        person.setAddresses(this.addresses);
        return person;
    }

    public PersonBuilder withFirstName(String firstName) {
        this.firstName = firstName;
        return this;
    }

    public PersonBuilder withLastName(String lastName) {
        this.lastName = lastName;
        return this;
    }

    public PersonBuilder withAddresses(List<Address> addresses) {
        this.addresses = addresses;
        return this;
    }

    public PersonBuilder withAddresses(Address... addresses) {
        return withAddresses(Arrays.asList(addresses));
    }

    public PersonBuilder withAddresses(AddressBuilder... addressBuilders) {
        this.addresses = new ArrayList<Address>();
        for (AddressBuilder addressBuilder : addressBuilders) {
            this.addresses.add(addressBuilder.build());
        }
        return this;
    }
}

SampleTests.java

    @Test
    public void hasAddress_TrueIfAPersonHasAtLeastOneAddress(){
        Person person = aPerson().withAddresses(anAddress()).build();
        assertTrue(person.hasAddress());
    }

    @Test
    public void hasAddress_FalseIfAPersonHasNoAddresses(){
        Person person = aPerson().withAddresses(anAddress()).build();
        assertFalse(person.hasAddress());
    }