class ServerTest < Minitest::Test
  include Rack::Test::Methods

  def app
    Server.new
  end

  def test_get_graphql_with_query_string
    header 'Content-Type', 'application/graphql'
    get '/', query: '{me}'

    assert last_response.ok?
    assert_equal 200, last_response.status
    refute_empty last_response.body

    json = JSON.parse(last_response.body)
    assert_equal 'mo', json['data']['me']
  end

  def test_get_graphql_with_post_body
    header 'Content-Type', 'application/graphql'
    post '/', '{me}'

    assert last_response.ok?
    assert_equal 200, last_response.status
    refute_empty last_response.body

    json = JSON.parse(last_response.body)
    assert_equal 'mo', json['data']['me']
  end

  def test_get_schema
    header 'Content-Type', 'application/graphql'
    post '/', '{ __schema { types { name } } }'

    assert last_response.ok?
    json = JSON.parse(last_response.body)

    [
      'Boolean',
      'Cake',
      'Query',
      'String',
      '__Directive',
      '__DirectiveLocation',
      '__EnumValue',
      '__InputValue',
      '__Type',
      '__TypeKind',
    ].each do |type|
      assert json['data']['__schema']['types'].include?('name' => type)
    end
  end

  def test_get_query_type
    header 'Content-Type', 'application/graphql'
    post '/', '{ __schema { queryType { name } } }'

    assert last_response.ok?
    json = JSON.parse(last_response.body)
    assert 'Query', json['data']['__schema']['queryType']['name']
  end

  def test_get_cakes_type
    header 'Content-Type', 'application/graphql'
    post '/', <<~GQL
    {
      __type(name: "Cake") {
        name
        kind
      }
    }
    GQL

    assert last_response.ok?
    json = JSON.parse(last_response.body)
    assert_equal 'Cake', json['data']['__type']['name']
    assert_equal 'OBJECT', json['data']['__type']['kind']
  end

  def test_get_cake_fields
    header 'Content-Type', 'application/graphql'
    post '/', <<~GQL
    {
      __type(name: "Cake") {
        name
        fields {
          name
          type {
            name
            kind
          }
        }
      }
    }
    GQL

    assert last_response.ok?
    json = JSON.parse(last_response.body)
    assert_equal 'Cake', json.dig('data', '__type', 'name')
    assert_equal [{
      'name' => 'name',
      'type' => {
        'name' => nil,
        'kind' => 'NON_NULL'
      }
    }], json.dig('data', '__type', 'fields')
  end
end