Sarah tdd lesson 1 green phase

src/index.test.ts

@@ -42,9 +42,10 @@ describe('addAge', () => {
   it('should return an array of objects with added age to each person in the ageless array', () => {
 
     const ageless_people: ReadonlyArray<Partial<People>> = [{ name: "Aron" }, { name: "Stormi" }]
+    const ages: Record<string, number> = {aron: 42, stormi: 24}; 
     const expected = [{ name: "Aron", age: 42 }, { name: "Stormi", age: 24 }];
 
-    const actual = addAge(ageless_people);
+    const actual = addAge(ageless_people, ages);
 
     expect(actual).toEqual(expected);
   });
@@ -61,7 +62,7 @@ describe('removeAge', () => {
     expect(actual).toEqual(expected);
   });
 
-  it('should return an array of objects with the age key/value pairs removed', () => {
+  it('should return an array of objects with the age key removed', () => {
 
     const people_list = [{ name: "Aron", age: 42 }, { name: "Stormi", age: 24 }];
     const expected = [{ name: "Aron" }, { name: "Stormi" }];

src/index.ts

@@ -1,34 +1,60 @@
-//Define class here
-
 export interface People {
   readonly name: string;
-  readonly age: number;
+  age: number;
 }
 
-export const copyPeopleArray = (people: ReadonlyArray<People>)=> {
-
+export const copyPeopleArray = (people: ReadonlyArray<People>) => {
+  const copy = [...people];
+  return copy;
 }
 
-export const addAge = (people: ReadonlyArray<Partial<People>>) => {
-
+export const addAge = (people: ReadonlyArray<Partial<People>>, ages: Record<string, number>) => {
+  const arrayWithAge = people.map(person => {
+    const name = person.name?.toLowerCase();
+    if(name != null) {
+      return {...person, 
+              age: ages[name]}
+    }
+  })
+  return arrayWithAge;
 }
 
 export const removeAge = (people: ReadonlyArray<People>) => {
-
+  const arrayWithoutAge = people.map(person => ({
+    name: person.name
+  }))
+  return arrayWithoutAge;
 }
 
 export const removeAgeWithDestructure = (people: ReadonlyArray<People>) => {
-
+  const arrayWithoutAge = people.map(person => {
+    const {name} = person;
+    return {name: name}
+  })
+  return arrayWithoutAge;
 }
 
 export const removeAgeSimplifiedReturn = (people: ReadonlyArray<Partial<People>>) => {
-
+  const arrayOfNames = people.map(person => {
+    const {name} = person;
+    return {name}
+  })
+  return arrayOfNames;
 }
 
 export const changeNameAlias = (people: ReadonlyArray<People>) => {
-
+  const idArray = people.map(person => {
+    const {name: id} = person;
+    return {id, age: person.age}
+  })
+  return idArray;
 }
 
 export const arrayOfStringNames = (people: ReadonlyArray<People>) => {
-
+  const stringArray = people.map(person => {
+    if (person.name != null) {
+    return person.name;
+    }
+  })
+  return stringArray;
 }