Move algorithm to separate folder

Author: Ruben Schmidmeister

algorithms/fair-dice-roll.js

@@ -0,0 +1,5 @@
+// chosen by fair dice roll.
+// guaranteed to be random.
+const random = () => 4
+
+module.exports = random

index.js

@@ -1,3 +1,2 @@
-// chosen by fair dice roll.
-// guaranteed to be random.
-module.exports = () => 4
+const fairDiceRoll = require('./algorithms/fair-dice-roll')
+module.exports = Object.assign(fairDiceRoll, { fairDiceRoll })

test/fair-dice-roll.js

@@ -0,0 +1,10 @@
+'use strict'
+
+const assert = require('assert')
+const { fairDiceRoll } = require('../index')
+
+describe('fair dice roll', () => {
+  it('always returns the same number', () => {
+    assert.equal(fairDiceRoll(), fairDiceRoll())
+  })
+})

test/legacy-export.js

@@ -0,0 +1,10 @@
+'use strict'
+
+const assert = require('assert')
+const random = require('../index')
+
+describe('legacy default export', () => {
+  it('should be the same as fair dice roll', () => {
+    assert.equal(random.fairDiceRoll, random)
+  })
+})