I am trying to run mocha unit test for my node application. The application is built by a docker image.
Docker image:
FROM node:6.10.0-alpine
RUN mkdir -p /app
WORKDIR /app
COPY package.json /app
RUN npm install
COPY . /app
EXPOSE 3000
CMD ["npm", "start"]
Docker compose:
version: "3"
services:
web: #### nodejs image
build: .
volumes:
- ./app/
ports:
- "3000:3000"
depends_on:
- db
db:
build: ##### postgres db image
context: .
dockerfile: dbDockerfile
ports:
- 5432:5432
The setup can be built and worked as expected. The problem is not I am sure how to run unit test commands like mocha to perform the test.
I see a module called dockunit but I am not sure if that's the only way for now. Can anyone help me out about this?
With docker (and docker-compose), you can run arbitrary commands in a container. The Dockerfile defines the default command that is run when no other command is specified, but that doesn't mean it's the only one you can run.
In your case: npm start is run when no other command is specified. That happens when you do docker-compose up.
But, you can run any command using docker run or docker-compose run. For your tests, that might look like this: docker-compose run web mocha.
There is a slight difference in up and run, and I encourage you to read up on it: Should I use docker-compose start up or run?
Does this help you get started?