JavaScript (#4)

* JavaScript

* Fix working directory

* Fix directory

* Fix

.github/workflows/javascript.yml

@@ -0,0 +1,40 @@
+name: JavaScript
+
+on:
+  push:
+    branches: [ "main" ]
+    paths:
+      - javascript/**
+  pull_request:
+    branches: [ "main" ]
+    paths:
+      - javascript/**
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: javascript
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Configure Node
+      uses: actions/setup-node@v3
+      with:
+        node-version: '18.x'
+        cache: 'npm'
+        cache-dependency-path: javascript/package-lock.json
+
+    - name: Install
+      run: npm install
+
+    - name: Test
+      run: npm test

README.md

@@ -20,4 +20,24 @@ Using:
 
 Using:
 * [Kotest](https://kotest.io)
-* [MockK](https://mockk.io/)
+* [MockK](https://mockk.io/)
+
+## JavaScript
+
+[![CI](https://github.com/rogervinas/tests-everywhere/actions/workflows/javascript.yml/badge.svg)](https://github.com/rogervinas/tests-everywhere/actions/workflows/javascript.yml)
+![Node](https://img.shields.io/badge/Node-18.x-blue?labelColor=black)
+
+JavaScript testing with [Jest](https://jestjs.io/)
+
+Pre-requisites:
+* Install [Node Version Manager](https://github.com/nvm-sh/nvm)
+* Install [Node.js](https://nodejs.org/en/) using `nvm use v18` or `nvm use stable`
+
+Create project from scratch:
+* Create project using `npm init`
+* Install [Jest](https://jestjs.io/) using `npm install --save-dev jest`
+
+Run this project:
+* Install dependencies running `npm install`
+* Test with `npm test`
+* Run with `npm start`

javascript/.gitignore

@@ -0,0 +1 @@
+node_modules

javascript/HelloApp.js

@@ -0,0 +1,15 @@
+const HelloMessage = require("./HelloMessage.js");
+const HelloConsole = require("./HelloConsole.js");
+
+class HelloApp {
+    constructor(helloMessage, helloConsole) {
+        this.helloMessage = helloMessage;
+        this.helloConsole = helloConsole;
+    }
+
+    printHello() {
+        this.helloConsole.print(this.helloMessage.text);
+    }
+}
+
+module.exports = HelloApp;

javascript/HelloApp.test.js

@@ -0,0 +1,26 @@
+const HelloMessage = require("./HelloMessage");
+const HelloConsole = require("./HelloConsole");
+const HelloApp = require("./HelloApp");
+
+jest.mock('./HelloMessage');
+jest.mock('./HelloConsole');
+
+describe('HelloApp', () => {
+    it("should print hello message", () => {
+        const helloMessageText = "Hello Test!";
+        HelloMessage.mockImplementation(() => {
+            return {
+                text: helloMessageText
+            }
+        });
+        const helloMessage = new HelloMessage();
+
+        const helloConsole = new HelloConsole();
+
+        const helloApp = new HelloApp(helloMessage, helloConsole);
+        helloApp.printHello();
+
+        expect(helloConsole.print).toHaveBeenCalledTimes(1);
+        expect(helloConsole.print).toHaveBeenCalledWith(helloMessageText);
+    })
+});

javascript/HelloConsole.js

@@ -0,0 +1,7 @@
+class HelloConsole {
+    print(text) {
+        console.log(text);
+    }
+}
+
+module.exports = HelloConsole

javascript/HelloMessage.js

@@ -0,0 +1,5 @@
+class HelloMessage {
+    text = "Hello World!";
+}
+
+module.exports = HelloMessage

javascript/HelloMessage.test.js

@@ -0,0 +1,8 @@
+const HelloMessage = require("./HelloMessage");
+
+describe('HelloMessage', () => {
+    it("should return hello world", () => {
+        const helloMessage = new HelloMessage();
+        expect(helloMessage.text).toBe('Hello World!');
+    })
+});

javascript/index.js

@@ -0,0 +1,8 @@
+const HelloMessage = require("./HelloMessage");
+const HelloConsole = require("./HelloConsole");
+const HelloApp = require("./HelloApp");
+
+const helloMessage = new HelloMessage();
+const helloConsole = new HelloConsole();
+const helloApp = new HelloApp(helloMessage, helloConsole);
+helloApp.printHello();