Works. Remember that i is the index, not the value itself.

rightDigit.js

@@ -1,6 +1,9 @@
 
 exports.rightDigit = function(numbers){
-    console.log('Been to Spain!');
-    var tuna = 42;
-        return [111, 222];
+    arrayAnswer = [];
+    for (i in numbers){
+        var digit = numbers[i] % 10;
+        arrayAnswer.push(digit);
+    }
+    return arrayAnswer;
 }

test/rightDigit.js

@@ -1,18 +1,31 @@
 // Given a list of non-negative integers, return an integer list of the rightmost digits. (Note: use %)
 // https://codingbat.com/prob/p152194 
 // https://semaphoreci.com/community/tutorials/getting-started-with-node-js-and-mocha 
-console.log('Been to Germany!');
 
 var expect    = require("chai").expect;
 var thingtotest = require("../rightDigit.js");
-console.log('111' + typeof thingtotest.rightDigit);
-console.log('222' + Object.keys(thingtotest.rightDigit).toString());
-console.log('333' + Object.keys(thingtotest.rightDigit).length);
+
 describe('Digit getter', () => {
     it('gets just the last digit of each', () =>{
 
             var blueHex  = thingtotest.rightDigit([1, 22, 93]);
-            expect(blueHex).to.equal([]);
+            expect(blueHex).to.deep.equal([1, 2, 3]);
+        })
+});
+
+describe('Digit getter', () => {
+    it('gets just the last digit of each', () =>{
+
+            var blueHex  = thingtotest.rightDigit([16, 8, 886, 8, 1]);
+            expect(blueHex).to.deep.equal([6, 8, 6, 8, 1]);
+        })
+});
+
+describe('Digit getter', () => {
+    it('gets just the last digit of each', () =>{
+
+            var blueHex  = thingtotest.rightDigit([10, 0]);
+            expect(blueHex).to.deep.equal([0, 0]);
         })
 });