A simple Karma framework to start a child process (which is supposed to start a server written with node).
npm install karma-child-processFramework for karma-test-runner which forks a process on startup to run a
separate node process during the karma tests. Internally it uses the fork method
of the child_process node module.
karma-child-process framework in your local directory type
npm install karma-child-process --save-dev
`
Of course you need to install karma as well.
`
npm install karma --save-dev
`Configuration
For configuration put this into your karma.conf.js:
`
config = {
frameworks: ['child-process'],
client: {
childProcess: {
path: 'path/to/mock-server.js',
args: [],
options: {}
}
}
}
`
The path is a mandatory argument providing the location of the node-script
that should be started. The path is a relative path based on the basePath
of the project. The args and options arguments are optional and if provided
directly forwarded to the fork method.
To execute the karma framework just run karma.
`
./node_modules/karma/bin/karma start
`
The mock-server.js should be node-script that is supposed to start a server.
A possible example might look like so:
`
/ eslint-env node /
const express = require('express');
const bodyParser = require('body-parser');
const app = express();
app.use(bodyParser.json());
let mainResponse = {};
app.post('/setMainResponseForTesting', (req, res) => {
mainResponse = req.body;
res.header('Access-Control-Allow-Origin', 'http://localhost:9876');
res.json(req.body);
});
app.get('/productiveEndpoint', (req, res) => {
res.header('Access-Control-Allow-Origin', 'http://localhost:9876');
res.json(mainResponse);
});
app.get('/reset', (req, res) => {
mainResponse = {};
res.header('Access-Control-Allow-Origin', 'http://localhost:9876');
res.json('Reset!');
});
app.listen(8000);
`
In this case the express-server would run on localhost port 8000. But you may configure
this via the args argument provided in the karma configuration. This is very
basic example. For real-world problems you might need a more complex setup.
Remember that you are not limited to express. You may use any node-script that
provides the desired solution for your development. Shutdown
During shutdown of the karma server the forked process is stopped as well.
There is no reset of the server as long as the karma server is running,
especially not between different runs of your test suite or even single tests.
If you want to achieve this then use the /reset Endpoint on your server and
trigger it programmatically.License
This project is licensed under the Apache 2.0 license. For further information
have a look into the LICENSE` file in the project root folder.