built out rockPaperScissors function with validity check and win stat…

01week/rockPaperScissors.js

@@ -1,17 +1,80 @@
 'use strict';
 
-const assert = require('assert');
+const assert = require('assert').strict;
 const readline = require('readline');
 const rl = readline.createInterface({
   input: process.stdin,
   output: process.stdout
 });
 
 
-function rockPaperScissors(hand1, hand2) {
+function rockPaperScissors(a, b) {
+
+  // define variables for win states:
+  const tie = "It's a tie!";
+  const player1Wins = "Hand one wins!";
+  const player2Wins = "Hand two wins!";
+  // take the function's arguments (player choices) and make them lowercase so they still run even if a player capitalizes a letter:
+  let hand1 = a.toLowerCase().trim();
+  let hand2 = b.toLowerCase().trim();
 
-  // Write code here
+  // check if the choices are valid/create a boolean so it can be compared in the results stage:
+  function choiceChecker(hand1, hand2) {
+    switch(hand1){
+      // if player 1 picks a valid turn then break and move on to checking player 2, or else return that it's a false move:
+      case 'rock':
+      case 'paper':
+      case 'scissors':
+        break;
+      default: 
+        return false;
+    }
+    // check player 2's choice and if both player's choices are valid then return true, if player 2's choice is not valid then return false:
+    switch(hand2){
+      case 'rock':
+      case 'paper':
+      case 'scissors':
+        return true;
+      default: 
+        return false;
+    }
+  }
+  // define a boolean variable created from the validity checking function:
+  let isValid = choiceChecker(hand1, hand2);
 
+  //     !!!   Win States   !!!
+  // if the choices aren't valid, say so:
+  if (!isValid) {
+    return 'Try again, choose either rock, paper, or scissors!';
+  }
+  // if the choices are the same, the game results in a tie:
+  else if (hand1 === hand2) {
+    return tie;
+  } 
+  // or else if player one picks rock, determine winner based off player 2's choice:
+  else if (hand1 === 'rock') {
+    if (hand2 === 'paper') {
+      return player2Wins;
+    } else {
+      return player1Wins;
+    }
+  }
+  // or else if player 1 picks paper, determine winner based off player 2's choice:
+  else if (hand1 === 'paper') {
+    if(hand2 === 'rock') {
+      return player1Wins;
+    } else {
+      return player2Wins;
+    }
+  }
+  // finally, if player 1 picks scissors, determine winner based off player 2's choice:
+  else if (hand1 === 'scissors') {
+    if (hand2 === 'rock') {
+      return player2Wins;
+    } else {
+      return player1Wins;
+    }
+  }
 }
 
 function getPrompt() {
@@ -29,19 +92,34 @@ if (typeof describe === 'function') {
 
   describe('#rockPaperScissors()', () => {
     it('should detect a tie', () => {
-      assert.equal(rockPaperScissors('rock', 'rock'), "It's a tie!");
-      assert.equal(rockPaperScissors('paper', 'paper'), "It's a tie!");
-      assert.equal(rockPaperScissors('scissors', 'scissors'), "It's a tie!");
+      assert.strictEqual(rockPaperScissors('rock', 'rock'), "It's a tie!");
+      assert.strictEqual(rockPaperScissors('paper', 'paper'), "It's a tie!");
+      assert.strictEqual(rockPaperScissors('scissors', 'scissors'), "It's a tie!");
     });
     it('should detect which hand won', () => {
-      assert.equal(rockPaperScissors('rock', 'paper'), "Hand two wins!");
-      assert.equal(rockPaperScissors('paper', 'scissors'), "Hand two wins!");
-      assert.equal(rockPaperScissors('rock', 'scissors'), "Hand one wins!");
+      assert.strictEqual(rockPaperScissors('rock', 'paper'), "Hand two wins!");
+      assert.strictEqual(rockPaperScissors('paper', 'scissors'), "Hand two wins!");
+      assert.strictEqual(rockPaperScissors('rock', 'scissors'), "Hand one wins!");
     });
     it('should scrub input to ensure lowercase with "trim"ed whitepace', () => {
-      assert.equal(rockPaperScissors('rOcK', ' paper '), "Hand two wins!");
-      assert.equal(rockPaperScissors('Paper', 'SCISSORS'), "Hand two wins!");
-      assert.equal(rockPaperScissors('rock ', 'sCiSsOrs'), "Hand one wins!");
+      assert.strictEqual(rockPaperScissors('rOcK', ' paper '), "Hand two wins!");
+      assert.strictEqual(rockPaperScissors('Paper', 'SCISSORS'), "Hand two wins!");
+      assert.strictEqual(rockPaperScissors('rock ', 'sCiSsOrs'), "Hand one wins!");
+    });
+    it('should detect all scenarios in which hand one wins', () => {
+      assert.strictEqual(rockPaperScissors('rock', 'scissors'), 'Hand one wins!');
+      assert.strictEqual(rockPaperScissors('paper', 'rock'), 'Hand one wins!');
+      assert.strictEqual(rockPaperScissors('scissors', 'paper'), 'Hand one wins!');
+    });
+    it('should detect all scenarios in which hand two wins', () => {
+      assert.strictEqual(rockPaperScissors('rock', 'paper'), 'Hand two wins!');
+      assert.strictEqual(rockPaperScissors('paper', 'scissors'), 'Hand two wins!');
+      assert.strictEqual(rockPaperScissors('scissors', 'rock'), 'Hand two wins!');
+    });
+    it('should only accept valid inputs', () => {
+      assert.strictEqual(rockPaperScissors('wreck', 'paper'), 'Try again, choose either rock, paper, or scissors!');
+      assert.strictEqual(rockPaperScissors('rock', 'proper'), 'Try again, choose either rock, paper, or scissors!');
+      assert.strictEqual(rockPaperScissors('nothing', 'wrong'), 'Try again, choose either rock, paper, or scissors!');
     });
   });
 } else {

package.json

@@ -25,7 +25,7 @@
     "http-server": "^0.11.1",
     "javascripting": "^2.6.1",
     "jsdom": "^11.6.2",
-    "mocha": "^5.0.0",
+    "mocha": "^5.2.0",
     "postcss-html": "^0.34.0",
     "stylelint": "^7.13.0"
   }