CucumberJS Introduction
In a console window initialize a simple npm project.
mkdir -p firstTest
cd firstTest
mkdir features
mkdir -p features/step_definitions
mkdir -p features/support
npm init -f
Install cucumber and assert packages and save to package file
cd firstTest
npm install cucumber assert --save-dev
Install cucumber and assert packages and save to package file
Updating your package.json file to run the tests. Within the scripts section of the package.json update the object test with the following.
"scripts": {
"test": "./node_modules/.bin/cucumber-js"
},
Once you have saved the package.json file you will now be able to run your tests using.
npm test
Create your first feature file written in Gherkin.
Feature: First Test
Scenario: Adding Numbers
Given numbers 2 and 5
When they are added together
Then the total should be 7
Build your first step definitions.
const {Given, Then, When} = require('cucumber');
const assert = require('assert');
let a, b, t;
Given('numbers {int} and {int}', function(int, int2) {
a = int;
b = int2;
});
When('they are added together', function() {
t = a + b;
});
Then('the total should be {int}', function(int) {
assert.equal(t, 7)
});
$ npm test
> [email protected] test /Users/ben/personal/cucumberjs-sample
> cucumber-js
...
1 scenario (1 passed)
3 steps (3 passed)
0m00.003s
If you would like to view this all together check it out on Github.