learn_sequel_model_spec.rb

require "sequel"

# Connect to the DB to make sequel happy. It expects a DB connection when you subclass Sequel::Model
DB = Sequel.sqlite

# Use the module to avoid naming collisions with other specs.

module LearnSequelModelSpec
  # Where can I safely declare this class without specifying
  # the database for it?!
  class Person < Sequel::Model
  end

  describe "Person Model" do
    let(:db) { Sequel.sqlite }

    before(:each) do
      db.create_table :persons do
        primary_key :id
        String :name, null: false, unique: true
      end

      Person.dataset = db[:persons]
    end

    context "round-trip" do
      example "happy path" do

        Person.create(name: "J. B. Rainsberger")
        found = Person.find(name: "J. B. Rainsberger")
        expect(found.id).not_to be_nil
        expect(found.name).to eq("J. B. Rainsberger")
      end
    end
  end
end

This makes me sad. A textbook example of programming by coincidence.