TestHarnessORMMixin class Null safety

Use methods from this class to test applications that use the Conduit ORM.

This class is mixed in to your TestHarness subclass to provide test utilities for applications that use use the Conduit ORM. Methods from this class manage setting up and tearing down your application's data model in a temporary database for the purpose of testing.

You must override context to return your application's ManagedContext service. You must override seed to insert static data in your database, as data is typically cleared between tests.

You invoke resetData in your harness' TestHarness.afterStart method, and typically in your test suite's tearDown method.

    class Harness extends TestHarness<MyChannel> with TestHarnessORMMixin {
        @override
        ManagedContext get context => channel.context;

        Future seed() async {
          await Query.insertObject(...);
        }
    }