TESTING AS A CONTAINERDOCKER WITH AND SELENIUM & FRIENDS TO SHIP FAST

Irfan Ahmad @critickerr

SOON AFTER THIS TALK ….

power lies in packaging

OUTLINE

▸Why? - Challenges

▸What? - Containers

▸How? - Testing in Containers

▸Really? -See Demo

▸Next? - Try Hands On Example

CHALLENGES : TESTING AND DELIVERY

WHY WE FAIL TO TEST?

45%

15% 5%

35%

▸ Slow-down deployments

▸ Slow test and setup

▸ Ineffective tests

▸Not needed

▸ * All of these challenges are linked to infrastructure underlying tests.

MATRIX FROM HELL - SHIP GOODS?

MATRIX FROM HELL - SHIP SOFTWARE?

CONATINERS

AN APPLICATION, PLUS ALL ITS DEPENDENCIES, LIBRARIES AND OTHER BINARIES, AND CONFIGURATION FILES NEEDED TO RUN IT, BUNDLED INTO ONE PACKAGE.

WHAT ARE CONTAINERS?

AN ENTIRE ISOLATED PORTABLE RUNTIME ENVIRONMENT

DOCKER▸ Docker is an open platform for developers and

sysadmins to build, ship, and run distributed applications.

INSIDE DOCKER ▸ Docker Image :static snapshot of the containers’

configuration.

▸ Docker Engine: a lightweight runtime and robust tooling that builds and runs your Docker containers.

▸ Docker Registry :a repository of images

DOCKER HUB

CONTAINERS VS VM

HOW COMPONENTS FITS TOGETHER

DOCKER LIFECYCLE

HOW DOCKER WORKS

DOCKER RUNDOCKER LOOKS

FOR LOCAL IMAGES

IS IT INSTALLEDDOCKER LOOKS REGISTRY FOR

IMAGES

NO

IS IT AVAILABLE

DOCKER DOWNLOADS THE

IMAGE

IMAGE INSTALLED LOCALLY

DOCKER CREATES NEW

CONTAINER AND STARTS

PROGRAM

CONTAINER IS RUNNING

YES

DOCKERFILE▸ configuration file with build instructions for

Docker images

DOCKER-COMPOSE ▸ Compose is a tool for defining and running

multi-container Docker applications

DEMO https://www.youtube.com/watch?v=kXlS69PXX68

PRE-REQUISITES▸ virtual-box

▸ download docker toolbox

▸ https://www.docker.com/products/docker-toolbox

VOTING APP : APP UNDER TEST▸ Simple Real Time voting app

▸ Runs with Docker Compose and multiple containers in network

VOTING APP : COMPONENTS

Deliver Below Test as Container to Test Voting App Docker Image

1.API 2.Web 3.Web with Selenium Grid

PROBLEM STATEMENT

TESTING: IN CONTAINERS, ON CONTAINERS

DOCKERS ANSWERS TO TESTING CHALLENGES

Problem Solution

Automation Dockerfile for setup

Agility & Reliability

Ship and Share Images

DevOps Infrastructure as Code

Scale Docker Compose

Tools Diversity

Docker support by and from vendors.

DOCKER - HANDS ON‣ clone https://github.com/irfanah/teststack

docker-compose up #for starting example-web app

‣ To run any test inside docker containers

‣ rake docker["api"] #for api tests

‣ rake docker["web"] #web tests on headless browse

‣ rake docker["webapp"] #web tests on selenium grid

BEST PRACTICES

▸ Ship Images , not just code

▸ One container one process

▸ Add only Required packages

▸ Group common operations

▸ Use Specific tags with Images

TRY A SIMPLE CI WORKFLOW

Q & A THANK YOU

Open Sourced - For Hands On

Github https://github.com/irfanah/TestStack https://github.com/irfanah/example-voting-app

Docker hub https://hub.docker.com/u/irfanah/

IRFAN AHMAD

Email irfan@critick.io Web http://critick.io Twitter @critickerr