changes to the tests

src/services/array-functions.js

@@ -1,29 +1,50 @@
 
 //in the function map, create a new array and store in a variable
-//loop theArray and call the fnc for each thing in the array, 
+//loop theArray and call the fnc for each thing in the array,
 //     passing in the item from the current loop into the call to fnc
 //add the returned value from fnc to the new array
 //return the new array
 export function map(theArray, fnc){
-
+  let convertedArray = [];
+  for (let i=0; i < theArray.length; i++){
+      let element = theArray[i];
+      let converted = fnc(element);
+      convertedArray.push(converted);
+    }
+    return convertedArray;
 }
 
 //create a new array
-//loop theArray and call the fnc for each thing in the array, 
+//loop theArray and call the fnc for each thing in the array,
 //     passing in the item from the current loop
 //fnc will return true or false, if true add the item to the new array else do not
 //return the new array
 export function filter(theArray, fnc){
-
+  let filteredArray = [];
+  for (let i=0; i < theArray.length; i++){
+    let element = theArray[i];
+    if (fnc(element) === true){
+      filteredArray.push(element);
+    }
+  }
+  return filteredArray;
 }
 
 
-//loop theArray and call the fnc for each thing in the array, 
+
+//loop theArray and call the fnc for each thing in the array,
 //     passing in the item from the current loop
-//fnc will return true or false, if true return the item 
+//fnc will return true or false, if true return the item
 //return null
 export function find(theArray, fnc){
-
+  let filteredArray = "";
+  for (let i=0; i < theArray.length; i++){
+    let element = theArray[i];
+    if (fnc(element) === true){
+      filteredArray = element;
+    }
+  }
+  return filteredArray;
 }
 
 
@@ -65,4 +86,4 @@ export function tail(theArray){
 //if false return theArray
 export function sort(theArray){
 
-}
+}

src/services/calculations.js

@@ -4,9 +4,9 @@ export function add(num1, num2){
 export function subtract(num1, num2){
   return num1 - num2;
 }
-export function multiple(num1, num2){
+export function multiply(num1, num2){
   return num1 * num2;
 }
 export function divide(num1, num2){
   return num1 / num2;
-}
+}

src/tests/array-functions.test.js

@@ -1,4 +1,4 @@
-import {map,filter,find,findLast} from "../services/array-functions";
+import {map,filter,find,findLast,head,sort} from "../services/array-functions";
 const names = ["Jon","Bob","Ted","Barney","Lilly","Robin","Saul","Axe"];
 const myNumbers = [4,3,55,22,99,1913,7,5,4,2,1];
 
@@ -42,16 +42,22 @@ describe("sort", () => {
   });
 });
 
-//filter should return an array with names of length 3
-//["Jon","Bob","Ted","Axe"]
+describe("filter", () => {
+  it("should return an array with names of length 3", () => {
+    expect(filter(names, findThree)).toEqual(["Jon","Bob","Ted","Axe"]);
+  });
+});
 
 //find should find one name of "Barney"
+describe("find", () => {
+  it("find should find one name of 'Barney'", () => {
+    expect(find(names, findBarney)).toEqual("Barney");
+  });
+});
 
 //findLast should find the last name of "Axe"
 
 //reverse should return an array with the elements in the opposite order
 //["Axe","Saul","Robin","Lilly","Barney","Ted","Bob","Jon"]
 //tail should return all elements in an array except the first one
 //[Bob","Ted","Barney","Lilly","Robin","Saul","Axe"];
-
-

src/tests/calculations.test.js

@@ -1,7 +1,25 @@
-import {add, subtract, multiply,divide} from "../services/calculations";
+import {add, subtract, multiply, divide} from "../services/calculations";
 
 describe("add", () => {
   it("should add 1 and 2 and return 3", () => {
     expect(add(1, 2)).toBe(3);
   });
 });
+
+describe("sub", () => {
+  it("should subtract 5 from 12 and return 7", () => {
+    expect(subtract(12, 5)).toBe(7);
+  });
+});
+
+describe("multiply", () => {
+  it("should multiply 6 and 6, then return 36", () => {
+    expect(multiply(6, 6)).toBe(36);
+  });
+});
+
+describe("divide", () => {
+  it("should 36 by 6 and return 6", () => {
+    expect(divide(36, 6)).toBe(6);
+  });
+});