Simple enough

gistfile1.txt

ackage no.companybook.extraction.tables;

import org.junit.Test;

import java.util.HashSet;
import java.util.Set;

import static org.junit.Assert.*;

public class PersonTest {
    class AccessException extends Exception {
        public AccessException(String message) { super(message); }
    }

    class Person {
        private Integer GENDER = 1;
        private Integer NAME = 2;

        private Set<Integer> fields = new HashSet<>();
        private String firstName;
        private boolean isMale;
        private String lastName;
        private boolean lazy;
        private boolean readOnly = true;

        public Person(String firstName, String lastName, boolean isMale) {
            fields.add(GENDER);
            fields.add(NAME);
            this.firstName = firstName;
            this.lastName = lastName;
            this.readOnly = readOnly;
            this.isMale = isMale;
        }

        public void writeable() {
            readOnly = false;
        }

        public String getFullName() throws AccessException {
            if (!fields.contains(NAME)) throw new AccessException("Nameless person");
            return firstName + " " + lastName;
        }

        public String getGender() throws AccessException {
            if (!fields.contains(GENDER)) throw new AccessException("Genderless person");
            if (isMale) return "Male";
            return "Female";
        }
    }

    @Test
    public void testNameAndGender() throws Exception {
        Person person = new Person("John", "Doe", true);
        person.writeable();
        assertEquals(person.getFullName(), "John Doe");
        assertEquals(person.getGender(), "Male");
    }

    @Test
    public void testNameAndGenderReadOnly() throws Exception {
        Person person = new Person("John", "Doe", true);
        assertEquals(person.getFullName(), "John Doe");
        assertEquals(person.getGender(), "Male");
    }

    @Test
    public void testName() throws Exception {
        Person person = new Person("John", "Doe", true);
        person.writeable();
        assertEquals(person.getFullName(), "John Doe");
    }

    @Test
    public void testGender() throws Exception {
        Person person = new Person("John", "Doe", true);
        person.writeable();
        assertEquals(person.getFullName(), "John Doe");
        assertEquals(person.getGender(), "Male");
    }
}