envio das respostas

semana18/aula1/jest.config.js

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+module.exports = {
+  roots: ["<rootDir>/tests"],
+  transform: {
+  "^.+\\.tsx?$": "ts-jest",
+  },
+  testRegex: "(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$",
+  moduleFileExtensions: ["ts", "tsx", "js", "jsx", "json", "node"],
+ }

semana18/aula1/package.json

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+{
+  "name": "aula1",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "jest"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@types/jest": "^26.0.22",
+    "@types/node": "^14.14.41",
+    "jest": "^26.6.3",
+    "ts-jest": "^26.5.5",
+    "ts-node": "^9.1.1",
+    "ts-node-dev": "^1.1.6",
+    "typescript": "^4.2.4"
+  }
+}

semana18/aula1/src/index.ts

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+import { User } from "./types/types";
+
+export const user: User = {
+  name: "felipe",
+  balance: 100
+}
+
+export const performPurchace = (user: User, value: number): User | undefined =>{
+  if(user.balance >= value){
+    return{
+      ...user,
+      balance: user.balance - value
+    }
+  }
+  return undefined
+}

semana18/aula1/src/types/types.ts

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+export interface User {
+  name: string,
+  balance: number
+} 

semana18/aula1/tests/perfomrPurchace.test.ts

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+import { performPurchace } from "../src"
+import { User } from "../src/types/types"
+
+test("Testing balance greater than value", () =>{
+  //Dados do usupario
+  const user : User ={
+    name: "Felipe",
+    balance: 1000
+  }
+
+  //Implementado a função
+  const result = performPurchace(user, 400)
+  //O que espero de resposta
+  expect(result).toEqual({
+    name: "Felipe",
+    balance: 600
+  })
+})
+
+test("Testing balance greater than value", () =>{
+  const user : User ={
+    name: "Felipe",
+    balance: 400
+  }
+
+  //Implementado a função
+  const result = performPurchace(user, 400)
+  expect(result).toEqual({
+    ...user,
+    balance: 0
+  })
+})
+
+test("Testing balance greater than value", () => {
+	const user: User = {
+		name: "Astrodev",
+		balance: 30
+	}
+
+	const result = performPurchace(user, 50)
+
+	expect(result).not.toBeDefined()
+})

semana18/aula1/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es6" ,
+    "module": "commonjs",
+    "outDir": "./build" ,
+    "rootDir": "./" ,
+    "strict": true ,
+    "sourceMap": true,
+    "removeComments": true,
+    "esModuleInterop": true ,
+    "forceConsistentCasingInFileNames": true 
+  }
+}