# frozen_string_literal: true

require 'rails_helper'
require './lib/pkparse'

RSpec.describe Mutations::UploadPokemon, 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(:upload_pokemon)] }

    it { is_expected.to have_graphql_fields(:pokemon, :errors) }
    it { is_expected.to have_graphql_arguments(:base64_encoded_pokemon_file) }
  end

  describe '#resolve' do
    let(:nickname) { Faker::Games::Pokemon.name }
    let(:pokedex_number) { rand(1..151) }
    let(:base64) { 'deadbeef' }

    subject { mutation.resolve(base64_encoded_pokemon_file: base64) }

    context 'pokemon is created' do
      before do
        allow_any_instance_of(PKParse::Client).to(
          receive(:parse_base64).and_return(
            PKParse::Response.new([{pokedex_number: pokedex_number, nickname: nickname}]),
          ),
        )
      end

      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) }
    end

    context 'pokemon could not be created' do
      before do
        allow_any_instance_of(PKParse::Client).to(
          receive(:parse_base64).and_raise(PKParse::Error.new('foo')),
        )
      end

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