Class TestApp

tests/config/test_application.py:792–800

            self.foo = Foo(parent=self)

    class TestApp(Application):
        name = "test"

        aliases = {"val": "Bar.Foo.val"}
        classes = [Foo, Bar]

        def initialize(self, *args, **kwargs):
            super().initialize(*args, **kwargs)
            self.bar = Bar(parent=self)

    app = TestApp()
    app.initialize(["--val=10"])