UT LoadTest

Uses autocannon to send many requests in parallel to a backend and
measures metrics like latency, requests per second, bytes per second.

Usage

``text
ut-xxx
└── test
├── jobs
| ├── index.js
| └── test.xxx.load.js
├── server
| ├── index.js
| └── unit.js
└── xxx.load.js
`

- test/jobs/test.xxx.load.js

`js
// load tests function names start with 'load'
module.exports = function load() {
return {
executePush: function(test, bus, run) {
return run(test, bus, [
'Generate admin user',
'Login admin user',
'Create access token',
// other steps
{
method: 'loadtest/xxx',
name: '...',
params: ({
loginToken,
}) => ({
autocannon: {
auth: loginToken
},
// other parameters
}),
result: function(result, assert) {
// result contains metrics
}
}
]);
}
};
};
`

- test/server/index.js

`js
module.exports = [
'ut-telemetry',
'ut-db',
// ... other modules
'ut-user',
'ut-login',
'ut-loadtest',
// ... other modules
].map(item => [{
main: require.resolve(item),
pkg: require.resolve(item + '/package.json')
}]);
`

- test/server/unit.js

`js
module.exports = {
implementation: 'xxx',
utLoadTest: true,
// ... other configuration
}
`

- test/server/xxx.load.js

`js
require('ut-run').run({
method: 'unit',
params: {
cluster: { // this activates load tests
workers: 4
}
},
version: require('../package.json').version,
root: __dirname,
resolve: require.resolve
});
``