WireMock Service

wdio-wiremock-service is a 3rd party package, for more information please see GitHub | npm

This service helps you to run WireMock seamlessly when running tests with WebdriverIO. It uses the well known Maven repository to download the WireMock jar for you which is then automatically installed, started and stopped. Stay up to date by joining the community over at Gitter for help and support.

Installation

npm i -D wdio-wiremock-service

Instructions on how to install WebdriverIO can be found here.

Usage

In the root directory (default ./mock) you find two subdirectories, __files and mappings which are used for your fixtures and mocks.

For more information, checkout WireMock's official documentation.

Configuration

In order to use the service with the wdio testrunner you need to add it to your service array:

// wdio.conf.js
export.config = {
  // ...
  services: ['wiremock'],
  // ...
};

When using webdriverio standalone you need to add the service and trigger the onPrepare and onComplete hooks manually. An example can be found here (the example makes use of Jest):

Options

The following options can be added to the service.

port

Port where WireMock should run on.

Type: Number

Default: 8080

Example:

// wdio.conf.js
export const config = {
	// ...
	services: [['wiremock', { port: 8181 }]],
	// ...
};

rootDir

Path where WireMock will look for files.

Type: String

Default: ./mock

Example:

// wdio.conf.js
export const config = {
	// ...
	services: [['wiremock', { rootDir: './mock' }]],
	// ...
};

version

Version of WireMock to be downloaded and used.

Type: String

Default: 3.3.1

Example:

// wdio.conf.js
export const config = {
	// ...
	services: [['wiremock', { version: '2.25.1' }]],
	// ...
};

skipWiremockInstall

Tell the service to skip downloading WireMock.

Type: Boolean

Default: false

Example:

// wdio.conf.js
export const config = {
	// ...
	services: [['wiremock', { skipWiremockInstall: true }]],
	// ...
};

binPath

Custom path to a local Wiremock binary (often used in combination with skipWiremockInstall).

Type: String

Default: './wiremock-standalone-3.0.0.jar' (relative from service)

Example:

// wdio.conf.js
export const config = {
	// ...
	services: [['wiremock', { binPath: './my-custom/example-path/wiremock-standalone-3.0.0.jar' }]],
	// ...
};

silent

Silent mode for logging WireMock's output (including additional logging from the service itself).

Type: Boolean

Default: false

Example:

// wdio.conf.js
export const config = {
	// ...
	services: [['wiremock', { silent: true }]],
	// ...
};

mavenBaseUrl

Base download url for Maven.

Type: String

Default: https://repo1.maven.org/maven2

Example:

// wdio.conf.js
export const config = {
	// ...
	services: [['wiremock', { mavenBaseUrl: 'https://repo1.maven.org/maven2' }]],
	// ...
};

args

List where you can pass all the supported arguments for configuring WireMock

Note: you cannot pass the options (port, rootDir, stdio, mavenBaseUrl) here as they will be ignored.

Type: Array

Example:

// wdio.conf.js
export const config = {
	// ...
	services: [
		[
			'wiremock',
			{
				args: ['--verbose', '--match-headers'],
			},
		],
	],
	// ...
};

Writing tests

Writing your first test is really straight forward:

Using the WDIO testrunner

import fetch from 'node-fetch'; // you can use any HTTP client you like
import { equal } from 'node:assert'; // you can use any assertion library you like

describe('example', () => {
	it(`should assert the mock data`, async () => {
		const body = await fetch('http://localhost:8080/api/mytest');
		equal(body.text(), 'Hello world!');
	});
});

Using WebdriverIO Standalone

import fetch from 'node-fetch'; // you can use any HTTP client you like
import { equal } from 'node:assert'; // you can use any assertion library you like
import { remote } from 'webdriverio';
import { launcher } from 'wdio-wiremock-service';

const WDIO_OPTIONS = {
	capabilities: {
		browserName: 'chrome',
	},
};

describe('example', () => {
	let wiremockLauncher;
	let client;

	beforeAll(async () => {
		wiremockLauncher = new launcher(); // create instance of the service
		await wiremockLauncher.onPrepare(WDIO_OPTIONS); // run the onPrepare hook
		client = await remote(WDIO_OPTIONS);
	});

	afterAll(async () => {
		await client.deleteSession();
		await wiremockLauncher.onComplete(); // run the onComplete hook
	});

	test('should showoff a mocked api response', async () => {
		const body = await fetch('http://localhost:8080/api/mytest');
		equal(body.text(), 'Hello world!');
	});
});

For more information on WebdriverIO see the homepage.