User Entity and Builder examples

user.java

package ucc.models;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.javafaker.Faker;
import io.restassured.response.Response;
import org.mms.qa.EmailBuilder;
import org.testng.annotations.Test;
import ucc.api.exp.myaccount.MyAccountApi;

import static org.junit.jupiter.api.Assertions.assertEquals;

class User {
	public String firstName;
	public String lastName;
	public String emailAddress;
	//...
}

class RegisteredUser extends User {
	public String ucid;
	//...
}

class Resident extends User {
	public String residencyYear;
	//...
}

class UserBuilder {

	User instance;

	public UserBuilder() {
		instance = generateDefaultUser();
	}

	public User generateDefaultUser() {
		instance = new User();
		instance.firstName = "First";
		instance.lastName = "Last";
		instance.emailAddress = EmailBuilder.generateEmailAddress(instance.firstName);
		//...

		return instance;
	}

	public Resident generateResident() {
		Resident resident = (Resident) generateDefaultUser();
		resident.residencyYear = "Current Year";
		//...

		return resident;
	}

	public UserBuilder forResident() {
		instance = generateResident();
		return this;
	}

	public UserBuilder withFirstName(String firstName) {
		instance.firstName = firstName;
	}

	public UserBuilder withEmailDomain(String domain) {
		instance.emailAddress = new EmailBuilder().withDomain(domain).generate();
		return this;
	}

	public User build() {
		return instance;
	}
}


class CustomerRegistrationJson {

	@JsonProperty("firstName")
	public String fName; // to simulate need to transform

	//... other properties

	public CustomerRegistrationJson fromUser(User user) {
		fName = user.firstName;
		//... transform

		return this;
	}

	public String toJson() throws JsonProcessingException {
		ObjectMapper mapper = new ObjectMapper();
		return mapper.writeValueAsString(this);
	}
}

class CustomerRegistrationResponseJson {
	/// etc.
}


class UseUserBuilder {

	@Test
	public void testUsingUserBuilder() throws JsonProcessingException {
		Faker faker = new Faker();
		String firstName = faker.name().firstName();

		User user = new UserBuilder().forResident().withEmailDomain("example.com").withFirstName(firstName).build();
		CustomerRegistrationJson customerRegistrationJson = new CustomerRegistrationJson().fromUser(user);

		MyAccountApi myAccountApi = new MyAccountApi();
		Response myAccountResponse = myAccountApi.buildRequest("customers/registration/{product}")
				.pathParam("product", "Resident360")
				.body(customerRegistrationJson.toJson())
				.post();

		assertEquals(200, myAccountResponse.getStatusCode());
	}
}