How to run maven selenium project in docker (Maven + Selenium + java + TestNg + docker)

Question

I need to run the selenium test cases into docker. I referred multiple articles are tried the same. I could run the test case in docker which has only selenium set up. But my project is maven build which I want to run in docker.

Project set up:

1. Selenium webdriver with Java
2. Maven as build tool
3. TestNg framework
4. Running test case thru maven run config, which runs the test cases updated in testng.xml

What I understand from few helpful articles:

• need to create test case jar
• create image and run the image in docker.

But I am unable to get the make this setup working.

Answer 1

I don't have experience using TestNg, but I run Selenium testing through maven in docker with the below configuration:

docker-compose.yml (this will allow you to connect to a separate selenium docker container)

  image: selenium/standalone-firefox
  volumes:
    - /dev/shm:/dev/shm
  ports:
    - "4444:4444"
  expose:
    - 4444

maven_container:
  build: . # uses Dockerfile
  links:
    - remote-webdriver

  volumes:
    - <your local volume>:<container volume>
  stdin_open: true
  tty: true
  entrypoint: /bin/sh

In your pom.xml in the "maven_container" be sure to include the selenium dependency (see below).

<dependency>
    <groupId>org.seleniumhq.selenium</groupId>
    <artifactId>selenium-java</artifactId>
    <version>${selenium.version}</version>
</dependency>

Finally, the docker image for the "maven_container". Notice we need to copy our local pom.xml over the generic pom.xml generated if we want to run mvn build, etc. before mounting volumes in docker-compose.

FROM zenika/alpine-maven
RUN apk update \
    && apk add ca-certificates wget \
    && update-ca-certificates

RUN apk add vim

RUN mvn archetype:generate -B \
    -DarchetypeGroupId=net.alchim31.maven -DarchetypeArtifactId=<intended artifact ID> -DarchetypeVersion=1.7 \
    -DgroupId=com.myproject -DartifactId=MyProject -Dversion=0.1-SNAPSHOT -Dpackage=com.scalascrape
WORKDIR /usr/src/app/MyProject
RUN rm pom.xml
COPY pom.xml .

Notice. you will have to wait on the selenium server to boot before you connect to it. This is an important consideration if you want to run your tests with the docker-compose up command.