# frozen_string_literal: true

require 'rails_helper'

RSpec.describe Resolvers::PokemonResolver, type: :graphql do
  subject { described_class.new(object: nil, context: {}) }

  after do
    # We need to make sure class instance variables are unset between runs.
    Resolvers::BaseResolver.instance_variable_set '@plurals', nil
  end

  it {
    is_expected.to have_graphql_arguments(
      :id,
      :ids,
      :iid,
      :iids,
      :pokedex_number,
      :pokedex_numbers,
      :nickname,
      :nicknames,
    )
  }

  describe '#resolve' do
    let!(:pkmn1) { create(:pokemon, nickname: 'Bulbasaur', pokedex_number: 1) }
    let!(:pkmn2) { create(:pokemon, nickname: 'Bulbasaur', pokedex_number: 1) }
    let!(:pkmn3) { create(:pokemon, nickname: 'Charizard', pokedex_number: 6) }
    let!(:pkmn4) { create(:pokemon, nickname: 'Pikachu', pokedex_number: 25) }

    it 'selects by id' do
      id = GraphQL::Schema::UniqueWithinType
           .encode(Types::PokemonType.name, pkmn1.id)
      res = resolve(described_class, args: {id: id})
      expect(res).to contain_exactly(pkmn1)

      id = GraphQL::Schema::UniqueWithinType
           .encode(Types::PokemonType.name, pkmn2.id)
      res = resolve(described_class, args: {id: id})
      expect(res).to contain_exactly(pkmn2)
    end

    it 'selects by id when given iid' do
      iid = pkmn1.id
      res = resolve(described_class, args: {iid: iid})
      expect(res).to contain_exactly(pkmn1)

      iid = pkmn2.id
      res = resolve(described_class, args: {iid: iid})
      expect(res).to contain_exactly(pkmn2)
    end

    it 'selects by nickname' do
      nickname = pkmn1.nickname
      res = resolve(described_class, args: {nickname: nickname})
      expect(res).to contain_exactly(pkmn1, pkmn2)

      nickname = pkmn3.nickname
      res = resolve(described_class, args: {nickname: nickname})
      expect(res).to contain_exactly(pkmn3)
    end

    it 'selects by pokedex_number' do
      pkdx = pkmn1.pokedex_number
      res = resolve(described_class, args: {pokedex_number: pkdx})
      expect(res).to contain_exactly(pkmn1, pkmn2)

      pkdx = pkmn4.pokedex_number
      res = resolve(described_class, args: {pokedex_number: pkdx})
      expect(res).to contain_exactly(pkmn4)
    end
  end
end