First attempt at inheritance homework.

.gitignore

@@ -1 +1,2 @@
 node_modules/
+.idea/

src/index.js

@@ -13,14 +13,35 @@ export function doubleXTimes ( x, num ) {
   return result;
 }
 
-export function doubleEach ( arr ) {
-  let result = arr.map( double );
+export const doubleEach = x => x.map(double);
 
-  // const result = arr.map( x => double( x ) );
-  // const result = arr.map( function ( x ) {
-  //   return double( x );
-  // });
+export function Animal() {
+    this.clorophyll = false;
+}
+Animal.SOUND = 'generic sound';
+Animal.prototype.speak = function () {return this.constructor.SOUND};
 
-  return result;
+export function Reptile() {
+    this.scales = true;
+}
+
+Reptile.SOUND = 'Roar';
+Reptile.prototype = new Animal();
+Reptile.prototype.constructor = Reptile;
+
+export function Primate() {
+    this.thumbs = true;
 }
+Primate.SOUND = 'Ooh ooh eee!';
+Primate.prototype = new Animal();
+Primate.prototype.constructor = Primate;
+
+export function Human() {
+    this.sentience = true;
+}
+Human.SOUND = 'hello';
+Human.prototype = new Primate();
+Human.prototype.constructor = Human;
+
+
 

src/spec.js

@@ -1,5 +1,5 @@
 import test from 'tape';
-import { double, doubleXTimes, doubleEach } from './index';
+import { double, doubleXTimes, doubleEach, Animal, Reptile, Primate, Human} from './index';
 
 test( 'double fn', function ( test ) {
   const actual = double( 5 );
@@ -28,3 +28,60 @@ test( 'doubleEach', function ( test ) {
   test.end();
 });
 
+test('Test to see if a new "Animal" instance can be created', function (test) {
+    const animal = new Animal();
+    test.ok( animal instanceof Animal, 'should create an instance of Animal');
+    test.end();
+});
+
+test('Test to see if the Animal type has a "speak" method', function (test) {
+
+    const animal = new Animal();
+    const expected = 'generic sound';
+    const actual = animal.speak();
+
+    test.equal( actual, expected, 'should make a generic sound when it speaks' );
+    test.end();
+});
+
+test('Test to see if "Primates" and "Reptiles" can be made from "Animals"', function (test) {
+
+    let actual, expected;
+
+    const reptile = new Reptile();
+
+    test.ok( reptile instanceof Reptile, 'should be an instance of Reptile' );
+    test.ok( reptile instanceof Animal, 'should be an instance of Animal' );
+
+    expected = Reptile.SOUND;
+    actual = reptile.speak();
+    test.equal( actual, expected, 'should make a reptile sound when it speaks' );
+
+    const primate = new Primate();
+
+    test.ok( primate instanceof Primate, 'should be an instance of Primate' );
+    test.ok( primate instanceof Animal, 'should be an instance of Animal' );
+
+    expected = Primate.SOUND;
+    actual = primate.speak();
+    test.equal( actual, expected, 'should make a primate sound when it speaks' );
+
+    test.end();
+});
+
+test('Test to see if a human can be made and it can speak', function (test) {
+
+    let actual, expected;
+
+    const human = new Human();
+
+    test.ok( human instanceof Human, 'should be an instance of Human' );
+    test.ok( human instanceof Primate, 'should be an instance of Primate' );
+    test.ok( human instanceof Animal, 'should be an instance of Animal' );
+
+    const message = 'hello';
+    expected = message;
+    actual = human.speak( message );
+    test.equal( actual, expected, 'should speak what it is asked to speak' );
+    test.end();
+});