Dependencies Should Be Visible at Construction

Mon, 01 Jun 2020 00:00:00 +0000

This line created a database record:

$user = UserFactory::new()->create([
 'external_id' => 123,
]);

It also performed an HTTP request.

The factory did not mention a client. The model did not accept one. A synchronous observer noticed the external identifier, prepared a profile export, and resolved a connector from global framework state. The connector then looked up a remote account.

In tests without a fake, that lookup reached DNS or the network and retried three times with exponential backoff. Tests which had run in under five seconds took more than thirty.

Dependency-Injection on Brian Faust

Dependencies Should Be Visible at Construction