Change docs and tests to use new style parameterized types

[martosaur]

I was wrong, fields defined as {:parameterized, Ecto.Enum, Ecto.Enum.init(values: ...)} are passed as-is and thus don't work with new Ecto. I added a missing test to cover this case.

Flop needs to either manually translate them to preserve backwards compatibility or add this to upgrading guide 😢 This PR assumes the latter, but don't feel pushed to proceed with this.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.67%. Comparing base (77dbd70) to head (d2e2a58).
Report is 17 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #490      +/-   ##
==========================================
+ Coverage   87.43%   87.67%   +0.24%     
==========================================
  Files          15       15              
  Lines         931      933       +2     
==========================================
+ Hits          814      818       +4     
+ Misses        117      115       -2     

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[martosaur]

Re: coverage. I'm not quite sure how to realistically trigger expand_type function. It seems like in most cases it's preceded by module.get_field_info call which translates definition returned from an adapter into an Ecto type. The only case I can think of is if someone called allowed_operators/1 for a field definition they got somewhere else, which I'm not sure makes a lot of sense?

[woylie]

Re: coverage. I'm not quite sure how to realistically trigger expand_type function. It seems like in most cases it's preceded by module.get_field_info call which translates definition returned from an adapter into an Ecto type. The only case I can think of is if someone called allowed_operators/1 for a field definition they got somewhere else, which I'm not sure makes a lot of sense?

Right, Flop.Schema expands the type at compile time already. I don't know whether there's a use case for this, but Flop.FieldInfo.ecto_type is a Flop.Schema.ecto_type(), which includes :from_schema and :ecto_enum, and allowed_operators accepts a FieldInfo struct or a Flop.Schema.ecto_type value directly. So let's just add tests for each combination to the allowed_operators tests for completeness.