If we just use the :order factory here, it has no line items and no total, which means when we try to push it into complete state, the #requires_payment? check fails because the order total is zero, which means the call to #process_payments is ignored
This spec includes taxes on line items, fees on the order and on line items, taxes on fees (inherited and non-inherited), shipping and payment fees and taxes on shipping. It checks all of these things are correctly updated after the order is changed via BOM.
OrderPaymentFinder was re-fetching the payment object from the database, so the subsequent line that stubs #authorize! on that payment was not being applied to the correct object.
Rails has changed the way helpers are loaded. It's a bit weird. It was throwing lots of errors, and recommended using this setting, but now requires that all helpers are loaded explicitly. I'm not sure about this.
The mismatched use of hash attributes as strings and hash attributes as symbols here (attrs['name'] and attrs[:name]) meant that the conditional was not returning the expected results in the test.
This is a generic issue caused by a clash between state machines trying to define (or failing to define) the #open method on adjustments as part of their state changes interface. This method is already defined in Object. For more details, see: bb42e33bf7/lib/state_machines/machine.rb (L323-L350)
This used to happen via an after_save callback in Shipment, which called `order.update!`. That has recently been removed. After changing a shipment's selected shipping rate (shipping method), we need to ensure the order's totals and states are updated. We don't need to update all of the order's adjustments though (see previous commit).
FYI Spree handled this issue like this: 24388485ed, but there are lots of things about that commit that are clearly awful, like: params handling in a model, duplication of Order::Updater logic across the codebase, the Shipment class having responsiblity for knowing which things need to be updated on the order, etc. The result is ultimately the same as what we're doing here though.
Error is
```
Failure/Error: @app.call(env)
LoadError:
Unable to autoload constant Api::V0::OrderCyclesController, expected /Users/jibees/dev/openfoodnetwork/app/controllers/api/v0/order_cycles_controller.rb to define it
```
