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  1. /*
  2. We are building a program to manage a gym's membership. The gym has multiple members, each with a unique ID, name, and membership status. The program allows gym staff to add new members, update members status, and get membership statistics.
  3.  
  4. Definitions:
  5. * A "member" is an object that represents a gym member. It has properties for the ID, name, and membership status.
  6. * A "membership" is a class which is used for managing members in the gym.
  7.  
  8. To begin with, we present you with two tasks:
  9. 1-1) Read through and understand the code below. Please take as much time as necessary, and feel free to run the code.
  10. 1-2) The test for Membership is not passing due to a bug in the code. Make the necessary changes to Membership to fix the bug.
  11. */
  12. import java.util.*;
  13. import org.junit.Test;
  14. import static org.junit.Assert.*;
  15.  
  16. enum MembershipStatus {
  17.     /*
  18.         Membership Status is of three types: BASIC, PRO and ELITE.
  19.         BASIC is the default membership a new member gets.
  20.         PRO and ELITE are paid memberships for the gym.
  21.     */
  22.     BASIC,
  23.     PRO,
  24.     ELITE
  25. }
  26.  
  27. class Member {
  28.     /* Data about a gym member.*/
  29.     public int memberId;
  30.     public String name;
  31.     public MembershipStatus membershipStatus;
  32.  
  33.     public Member(int memberId, String name, MembershipStatus membershipStatus) {
  34.         this.memberId = memberId;
  35.         this.name = name;
  36.         this.membershipStatus = membershipStatus;
  37.     }
  38.  
  39.     @Override
  40.     public String toString() {
  41.         return "Member ID: " + memberId + ", Name: " + name + ", Membership Status: " + membershipStatus;
  42.     }
  43. }
  44.  
  45. class Membership {
  46.     /*
  47.         Data for managing a gym membership, and methods which staff can
  48.         use to perform any queries or updates.
  49.     */
  50.     public List<Member> members;
  51.  
  52.     public Membership() {
  53.         members = new ArrayList<>();
  54.     }
  55.  
  56.     public void addMember(Member member) {
  57.         members.add(member);
  58.     }
  59.  
  60.     public void updateMembership(int memberId, MembershipStatus membershipStatus) {
  61.         for (Member member : members) {
  62.             if (member.memberId == memberId) {
  63.                 member.membershipStatus = membershipStatus;
  64.                 break;
  65.             }
  66.         }
  67.     }
  68.  
  69.     public MembershipStatistics getMembershipStatistics() {
  70.         int totalMembers = members.size();
  71.         int totalPaidMembers = 0;
  72.         for (Member member : members) {
  73.             if (member.membershipStatus == MembershipStatus.PRO) {
  74.                 totalPaidMembers++;
  75.             }
  76.         }
  77.         double conversionRate = (totalPaidMembers / (double) totalMembers) * 100.0;
  78.         return new MembershipStatistics(totalMembers, totalPaidMembers, conversionRate);
  79.     }
  80. }
  81.  
  82. class MembershipStatistics {
  83.     /*
  84.         Class for returning the getMembershipStatistics result
  85.     */
  86.     public int totalMembers;
  87.     public int totalPaidMembers;
  88.     public double conversionRate;
  89.  
  90.     public MembershipStatistics(int totalMembers, int totalPaidMembers, double conversionRate) {
  91.         this.totalMembers = totalMembers;
  92.         this.totalPaidMembers = totalPaidMembers;
  93.         this.conversionRate = conversionRate;
  94.     }
  95. }
  96.  
  97. class Ideone {
  98.     /*
  99.         This is not a complete test suite, but tests some basic functionality of
  100.         the code and shows how to use it.
  101.     */
  102.     public static void main(String[] args) {
  103.         testMember();
  104.         testMembership();
  105.     }
  106.  
  107.     public static void testMember() {
  108.         System.out.println("Running testMember");
  109.         Member testMember = new Member(1, "John Doe", MembershipStatus.BASIC);
  110.         assert testMember.memberId == 1;
  111.         assert testMember.name.equals("John Doe");
  112.         assert testMember.membershipStatus == MembershipStatus.BASIC;
  113.     }
  114.  
  115.     public static void testMembership() {
  116.         System.out.println("Running testMembership");
  117.         Membership testMembership = new Membership();
  118.         Member testMember = new Member(1, "John Doe", MembershipStatus.BASIC);
  119.         testMembership.addMember(testMember);
  120.         assert testMembership.members.size() == 1;
  121.         assert testMembership.members.get(0).equals(testMember);
  122.  
  123.         testMembership.updateMembership(1, MembershipStatus.PRO);
  124.         assert testMembership.members.get(0).membershipStatus == MembershipStatus.PRO;
  125.  
  126.         Member testMember2 = new Member(2, "Alex C", MembershipStatus.BASIC);
  127.         testMembership.addMember(testMember2);
  128.  
  129.         Member testMember3 = new Member(3, "Marie C", MembershipStatus.ELITE);
  130.         testMembership.addMember(testMember3);
  131.  
  132.         Member testMember4 = new Member(4, "Joe D", MembershipStatus.PRO);
  133.         testMembership.addMember(testMember4);
  134.  
  135.         MembershipStatistics attendanceStats = testMembership.getMembershipStatistics();
  136.         assert attendanceStats.totalMembers == 4;
  137.         assert attendanceStats.totalPaidMembers == 3;
  138.         assert Math.abs(attendanceStats.conversionRate - 75.00) < 0.1;
  139.     }
  140. }
Success #stdin #stdout 0.09s 54584KB
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Running testMember
Running testMembership
https://ideone.com/SRbUZL
language:
Java (HotSpot 12)
created:
15 days ago
visibility:
public

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