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mocha-docker-postgres
Advanced tools
mocha testhelper for integration tests with postgres using docker.
require('mocha-docker-postgres'); // will patch the mocha Context prototype
var someModule = require('../someModule');
describe('some module', function () {
var instanceOfSomeModule;
before(function () {
this.timeout(10000); // you may need to bump the timeout for this block
return this.dockerPostgres();
});
before(function () {
// create an instance of someModule where the connection string
// to the created postgres instance is passed along as an option
instanceOfSomeModule = someModule({
conString: this.conString
});
});
it('should ...', function () {
return expect(instanceOfSomeModule.whatEver, 'to ...');
});
});
A call to this.dockerPostgres()
will start a docker container (unless we already
have one that fits) , and will set the value this.conString to the postgres url
needed to connect to that database.
The method returns a promise, and that promise will not resolve until the postgres database is ready to accept connections.
You get a completely fresh database after each call to this.dockerPostgres
so
you will need to run your migrations in a before hook after that.
If you want to have a completely fresh database for each test, you can make the
before
hook into a beforeEach
. It will reuse the same postgres container,
but create new databases for each invocation of the method - which makes it a lot
less time consuming.
On my developer work station it takes about 4 seconds for postgres to start up, and that is only done once per test run.
FAQs
Test helper for Postgres integration tests.
We found that mocha-docker-postgres demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 4 open source maintainers collaborating on the project.
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