refresh the tests

starter-code/tests/FunctionsAndArraysSpec.js

@@ -1,120 +1,119 @@
 function shuffle(currentArray) {
-  var array = currentArray.map(function(arr) {
-    return arr.slice();
-  });
-  var counter = array.length;
+  const array = currentArray.map(arr => arr.slice());
+  const counter = array.length;
+
   while (counter > 0) {
-    var index = Math.floor(Math.random() * counter);
+    let index = Math.floor(Math.random() * counter);
     counter--;
-    var temp = array[counter];
+    let temp = array[counter];
     array[counter] = array[index];
     array[index] = temp;
   }
   return array;
 }
-describe("Find the maximum - maxOfTwoNumbers", function() {
-  it("Defines maxOfTwoNumbers", function() {
+describe("Find the maximum - maxOfTwoNumbers", () => {
+  it("Defines maxOfTwoNumbers", () => {
     expect(typeof maxOfTwoNumbers).toBe("function");
   });
 
-  it("First parameter larger", function() {
+  it("First parameter larger", () => {
     expect(maxOfTwoNumbers(2, 1)).toBe(2);
   });
 
-  it("Second parameter larger", function() {
+  it("Second parameter larger", () => {
     expect(maxOfTwoNumbers(1, 3)).toBe(3);
   });
 
-  it("First and Second parameter equal", function() {
+  it("First and Second parameter equal", () => {
     expect(maxOfTwoNumbers(4, 4)).toBe(4);
   });
 });
 
-describe("Finding Longest Word - findLongestWord", function() {
+describe("Finding Longest Word - findLongestWord", () => {
   it("Defines findLongestWord", function() {
     expect(typeof findLongestWord).toBe("function");
   });
 
-  it("returns null when called with an empty array", function() {
+  it("returns null when called with an empty array", () => {
     expect(findLongestWord([])).toBe(null);
   });
 
-  it("returns the word when called with a single-word array", function() {
+  it("returns the word when called with a single-word array", () => {
     expect(findLongestWord(["foo"])).toBe("foo");
   });
 
-  it("returns the first occurrence word when longest have multiple occurrences ", function() {
+  it("returns the first occurrence word when longest have multiple occurrences ", () => {
     expect(findLongestWord(["foo", "bar"])).toBe("foo");
     expect(findLongestWord(["bar", "foo"])).toBe("bar");
   });
 
-  it("returns the longest occurrence when it has multiple words", function() {
-    var words = ["a", "zab", "12abc", "$$abcd", "abcde", "ironhack"];
-    for (var i = 0; i < 10; i++) {
+  it("returns the longest occurrence when it has multiple words", () => {
+    const words = ["a", "zab", "12abc", "$$abcd", "abcde", "ironhack"];
+    for (let i = 0; i < 10; i++) {
       words = shuffle(words);
       expect(findLongestWord(words)).toBe("ironhack");
     }
   });
 });
 
-describe("Calculating a Sum - sumArray", function() {
-  it("Defines sumArray", function() {
+describe("Calculating a Sum - sumArray", () => {
+  it("Defines sumArray", () => {
     expect(typeof sumArray).toBe("function");
   });
 
-  it("returns zero with an empty array", function() {
+  it("returns zero with an empty array", () => {
     expect(sumArray([])).toBe(0);
   });
 
-  it("returns the sum with one number array", function() {
+  it("returns the sum with one number array", () => {
     expect(sumArray([4])).toBe(4);
   });
 
-  it("returns zero if all elements are zero", function() {
+  it("returns zero if all elements are zero", () => {
     expect(sumArray([0, 0, 0, 0, 0])).toBe(0);
   });
 
-  it("returns the sum", function() {
+  it("returns the sum", () => {
     expect(sumArray([10, 5, 4, 32, 8])).toBe(59);
   });
 });
 
-describe("Calculating the Average - averageNumbers", function() {
-  it("Defines averageNumbers", function() {
+describe("Calculating the Average - averageNumbers", () => {
+  it("Defines averageNumbers", () => {
     expect(typeof averageNumbers).toBe("function");
   });
 
-  it("returns null with an empty array", function() {
+  it("returns null with an empty array", () => {
     expect(averageNumbers([])).toBe(null);
   });
 
-  it("returns the average of a unique element array", function() {
+  it("returns the average of a unique element array", () => {
     expect(averageNumbers([9])).toBe(9);
   });
 
-  it("returns the average even with negative values", function() {
+  it("returns the average even with negative values", () => {
     expect(averageNumbers([9, -3, -4, 6])).toBe(2);
   });
 
-  it("returns the average of the array", function() {
+  it("returns the average of the array", () => {
     expect(averageNumbers([9, 10, 82, 92, 32, 102, 58])).toBe(55);
   });
 });
 
-describe("Calculating the Average - averageWordLength", function() {
-  it("Defines averageWordLength", function() {
+describe("Calculating the Average - averageWordLength", () => {
+  it("Defines averageWordLength", () => {
     expect(typeof averageWordLength).toBe("function");
   });
 
-  it("returns null with an empty array", function() {
+  it("returns null with an empty array", () => {
     expect(averageWordLength([])).toBe(null);
   });
 
-  it("returns the average of a unique element array", function() {
+  it("returns the average of a unique element array", () => {
     expect(averageWordLength(["ironhack"])).toBe(8);
   });
 
-  it("returns the average of a the array", function() {
+  it("returns the average of a the array", () => {
     expect(
       averageWordLength([
         "Ironhack",
@@ -130,26 +129,26 @@ describe("Calculating the Average - averageWordLength", function() {
   });
 });
 
-describe("Unique Arrays - uniquifyArray", function() {
-  it("Defines uniquifyArray", function() {
+describe("Unique Arrays - uniquifyArray", () => {
+  it("Defines uniquifyArray", () => {
     expect(typeof uniquifyArray).toBe("function");
   });
 
-  it("returns [] with an empty array", function() {
+  it("returns [] with an empty array", () => {
     expect(uniquifyArray([])).toEqual([]);
   });
 
-  it("returns the correct array when having an array of the same element", function() {
+  it("returns the correct array when having an array of the same element", () => {
     expect(uniquifyArray(["Ironhack", "Ironhack", "Ironhack"])).toEqual([
       "Ironhack"
     ]);
   });
 
-  it("returns the same array when no element is repeated", function() {
+  it("returns the same array when no element is repeated", () => {
     expect(uniquifyArray(["Cat", "Dog", "Cow"])).toEqual(["Cat", "Dog", "Cow"]);
   });
 
-  it("returns the uniquified array", function() {
+  it("returns the uniquified array", () => {
     expect(
       uniquifyArray([
         "iPhone",
@@ -166,20 +165,20 @@ describe("Unique Arrays - uniquifyArray", function() {
   });
 });
 
-describe("Finding Elements - doesWordExist", function() {
-  it("Defines doesWordExist", function() {
+describe("Finding Elements - doesWordExist", () => {
+  it("Defines doesWordExist", () => {
     expect(typeof doesWordExist).toBe("function");
   });
 
-  it("returns false with an empty array", function() {
+  it("returns false with an empty array", () => {
     expect(doesWordExist([])).toBe(false);
   });
 
-  it("returns true if the word we are looking is the only one on the array", function() {
+  it("returns true if the word we are looking is the only one on the array", () => {
     expect(doesWordExist(["machine"], "machine")).toBe(true);
   });
 
-  it("returns false if the word we are looking is not in the array", function() {
+  it("returns false if the word we are looking is not in the array", () => {
     expect(
       doesWordExist(
         ["machine", "poison", "eat", "apple", "horse"],
@@ -188,7 +187,7 @@ describe("Finding Elements - doesWordExist", function() {
     ).toBe(false);
   });
 
-  it("returns true if the word we are looking is in the array", function() {
+  it("returns true if the word we are looking is in the array", () => {
     expect(
       doesWordExist(
         ["pizza", "sandwich", "snack", "soda", "book", "computer"],
@@ -198,26 +197,26 @@ describe("Finding Elements - doesWordExist", function() {
   });
 });
 
-describe("Counting Repetition - howManyTimes", function() {
-  it("Defines howManyTimes", function() {
+describe("Counting Repetition - howManyTimes", () => {
+  it("Defines howManyTimes", () => {
     expect(typeof howManyTimes).toBe("function");
   });
 
-  it("returns 0 with an empty array", function() {
+  it("returns 0 with an empty array", () => {
     expect(howManyTimes([])).toBe(0);
   });
 
-  it("returns one when the word appears only one time on the array", function() {
+  it("returns one when the word appears only one time on the array", () => {
     expect(howManyTimes(["basketball", "football", "tennis"], "tennis")).toBe(
       1
     );
   });
 
-  it("returns zero when the word does not appears on the array", function() {
+  it("returns zero when the word does not appears on the array", () => {
     expect(howManyTimes(["basketball", "football", "tennis"], "rugby")).toBe(0);
   });
 
-  it("returns five when the word appears 5 times on the array", function() {
+  it("returns five when the word appears 5 times on the array", () => {
     expect(
       howManyTimes(
         [
@@ -239,13 +238,13 @@ describe("Counting Repetition - howManyTimes", function() {
   });
 });
 
-describe("Bonus Quest - greatestProduct", function() {
-  it("Defines greatestProduct", function() {
+describe("Bonus Quest - greatestProduct", () => {
+  it("Defines greatestProduct", () => {
     expect(typeof greatestProduct).toBe("function");
   });
 
-  it("Return 1 when all the numbers of the arrays are 1", function() {
-    var matrix = [
+  it("Return 1 when all the numbers of the arrays are 1", () => {
+    let matrix = [
       [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
       [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
       [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
@@ -270,8 +269,8 @@ describe("Bonus Quest - greatestProduct", function() {
     expect(greatestProduct(matrix)).toBe(1);
   });
 
-  it("Return 16 when all the numbers of the arrays are 2", function() {
-    var matrix = [
+  it("Return 16 when all the numbers of the arrays are 2", () => {
+    let matrix = [
       [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2],
       [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2],
       [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2],