impress/spec/models/species_spec.rb

require_relative '../rails_helper'

RSpec.describe Species do
	fixtures :species, :colors

	describe "#valid_colors_for_species" do
		it('returns colors that have pet types for the species') do
			# The Blue Acara exists in fixtures, as does a "Color #123 Acara", which we'll ignore.
			compatible_colors = species(:acara).compatible_colors
			expect(compatible_colors.map(&:id)).to eq [8]
		end
	end

	describe '#to_param' do
		it("uses name when possible") do
			expect(species(:acara).to_param).to eq "Acara"
		end

		it("uses IDs for new species") do
			expect(Species.new(id: 12345).to_param).to eq "12345"
		end
	end

	describe ".param_to_id" do
		it("looks up by name") do
			expect(Species.param_to_id("acara")).to eq species(:acara).id
		end

		it("is case-insensitive for name") do
			expect(Species.param_to_id("aCaRa")).to eq species(:acara).id
		end

		it("returns ID when the param is just a number, even if no record exists") do
			expect(Species.param_to_id("123456")).to eq 123456
		end

		it("raises RecordNotFound if no name matches") do
			expect { Species.param_to_id("nonexistant") }.
				to raise_error ActiveRecord::RecordNotFound
		end
	end
end