# frozen_string_literal: true

require 'rails_helper'

RSpec.describe Mutations::CreatePokemon, type: :graphql do
  subject(:mutation) { described_class.new(object: nil, context: {}) }

  describe 'fields and arguments' do
    let!(:described_class) { PokemonTradeSchema.types['Mutation'] }
    subject { described_class.fields[GraphQLHelpers.fieldnamerize(:create_pokemon)] }

    it { is_expected.to have_graphql_fields(:pokemon, :errors) }
    it { is_expected.to have_graphql_arguments(:pokedex_number, :nickname) }
  end

  describe '#resolve' do
    let(:nickname) { Faker::Games::Pokemon.name }
    let(:pokedex_number) { rand(1..151) }

    subject { mutation.resolve(nickname: nickname, pokedex_number: pokedex_number) }

    it 'returns pokemon' do
      expect(subject[:pokemon]).not_to be_nil
      expect(subject[:pokemon]).to be_a Pokemon
    end

    specify { expect { subject }.to change { Pokemon.count }.by(1) }

    context 'pokemon could not be created' do
      let(:pokedex_number) { nil }

      it 'returns errors' do
        expect(subject[:errors].length).to eq(1)
      end
    end
  end
end