State Management: Properly Prepare Your Environment for Success
To start project we will need to create node project. I assume that you have installed Node.js on your machine.
If not you can do it easy with installator on https://nodejs.org/en/.
Now lets create a project. I assume that you are familiar with command line. Open command line and go to your directory in which you will create your project.
In your project directory please run command:
npm init -y
This command will initialise node.js project in your directory. Flag -y
will omit prompt questions (this will help you to save few seconds).
To start project lets use Jest engine. (To get deeper knowledge of JEST https://jestjs.io/). In command line please run:
npm i jest
Now open your package.json
file. Please change scripts
section to "test": "jest"
. After saving your changes file should be simillar to this one:
{
"name": "fedojo_com__state_management",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "jest"
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"jest": "^24.9.0"
}
}
Now in command line when you will run command below:
npm run test
Jest will automatically run test in your project.
Project structure
Now lets create a project structure. In root folder please write:
mkdir src
cd src
touch state.js
mkdir _test_
cd _test_
touch state.test.js
This commands will create folder src
then open it and create state.js
file. After that we are creating _test_
foleder open it and create state.test.js
file. Now open your favourite IDE and open state.test.js
file. Inside this file lets write:
test("First test", () => {
expect(true).toBe(true);
});
Now in command line lets run:
npm run test
In your command line you should see:
PASS src/_test_/state.test.js
✓ First test (3ms)
Test Suites: 1 passed, 1 total
Tests: 1 passed, 1 total
Snapshots: 0 total
Time: 1.399s
Ran all test suites.
What we have done is simple check if true
is equal true
just to make sure that JEST is working fine.
VOILA!