Class9 space travel to mars

05week/spaceTravelToMars.js

@@ -2,27 +2,72 @@
 
 let assert = require('assert');
 
+/* global jobTypes object with different jobs   */
 let jobTypes = {
   pilot: 'MAV',
   mechanic: 'Repair Ship',
   commander: 'Main Ship',
   programmer: 'Any Ship!'
 };
 
-// Your code here
+/*create a class called crewMember with properties name, job, specialSkill,ship
+set ship to null. CrewMember has a method called enterShip that has an instance
+of the Ship class as an argument. It also assigns shipInstance to crewmember's
+ship property and crewMember to crew of the ship  */
+class CrewMember {
+  constructor(name, job, specialSkill, ship) {
+    this.name = name;
+    this.job = job;
+    this.specialSkill = specialSkill;
+    this.ship = null;
+  }
+  enterShip(shipInstance) {
+    this.ship = shipInstance;
+    shipInstance.crew.push(this);
+  }
+}
+
+/* Ship class with name,type, ability, crew[]. Has missionStatement() which returns
+Ship ability when it has a crew greater than 0. */
+class Ship {
+  constructor(name, type, ability, crew) {
+    this.name = name;
+    this.type = type;
+    this.ability = ability;
+    this.crew = [];
+  }
+  missionStatement() {
+    return this.crew.length == 0 ? "Can't perform a mission yet." : this.ability;
+  }
+}
+
+/* Creating instances of Ship and CrewMember classes.                */
+let mav = new Ship('Mars Acent Vehicle', 'MAV', 'Ascend into low orbit');
+let hermes = new Ship('Hermes', 'Main Ship', 'Interplanetary Space Travel');
+let crewMember1 = new CrewMember('Rick Martinez', 'pilot', 'chemistry');
+let crewMember2 = new CrewMember('Commander Lewis', 'commander', 'geology');
+/* instances of CrewMember class calling their enterShip method and passing an
+instance of the Ship class */
+crewMember1.enterShip(mav);
+crewMember2.enterShip(hermes);
+/* Ship instances calling their missionStatement() method that returns their
+ship ability when they have a crew or Can't perform mission when crew[] length
+is 0.  */
+mav.missionStatement();
+hermes.missionStatement()
 
 //tests
-if (typeof describe === 'function'){
-  describe('CrewMember', function(){
-    it('should have a name, a job, a specialSkill and ship upon instantiation', function(){
+if (typeof describe === 'function') {
+  describe('CrewMember', function() {
+    it('should have a name, a job, a specialSkill and ship upon instantiation', function() {
       var crewMember1 = new CrewMember('Rick Martinez', 'pilot', 'chemistry');
       assert.equal(crewMember1.name, 'Rick Martinez');
       assert.equal(crewMember1.job, 'pilot');
       assert.equal(crewMember1.specialSkill, 'chemistry');
       assert.equal(crewMember1.ship, null);
     });
 
-    it('can enter a ship', function(){
+    it('can enter a ship', function() {
       let mav = new Ship('Mars Ascent Vehicle', 'MAV', 'Ascend into low orbit');
       let crewMember1 = new CrewMember('Rick Martinez', 'pilot', 'chemistry');
       crewMember1.enterShip(mav);
@@ -32,16 +77,16 @@ if (typeof describe === 'function'){
     });
   });
 
-  describe('Ship', function(){
-    it('should have a name, a type, an ability and an empty crew upon instantiation', function(){
+  describe('Ship', function() {
+    it('should have a name, a type, an ability and an empty crew upon instantiation', function() {
       let mav = new Ship('Mars Ascent Vehicle', 'MAV', 'Ascend into low orbit');
       assert.equal(mav.name, 'Mars Ascent Vehicle');
       assert.equal(mav.type, 'MAV');
       assert.equal(mav.ability, 'Ascend into low orbit');
       assert.equal(mav.crew.length, 0);
     });
 
-    it('can return a mission statement correctly', function(){
+    it('can return a mission statement correctly', function() {
       let mav = new Ship('Mars Ascent Vehicle', 'MAV', 'Ascend into low orbit');
       let crewMember1 = new CrewMember('Rick Martinez', 'pilot', 'chemistry');
       let hermes = new Ship('Hermes', 'Main Ship', 'Interplanetary Space Travel');