require 'spec_helper'

describe GraphQL::StaticValidation::FieldsHaveAppropriateSelections do
  let(:document) { GraphQL.parse("
    query getCheese {
      okCheese: cheese(id: 1) { fatContent, similarCheese(source: YAK) { source } }
      missingFieldsCheese: cheese(id: 1)
      illegalSelectionCheese: cheese(id: 1) { id { something, ... someFields } }
    }
  ")}

  let(:validator) { GraphQL::StaticValidation::Validator.new(schema: DummySchema, rules: [GraphQL::StaticValidation::FieldsHaveAppropriateSelections]) }
  let(:errors) { validator.validate(document) }

  it 'adds errors for selections on scalars' do
    assert_equal(2, errors.length)

    illegal_selection_error = {
      "message"=>"Selections can't be made on scalars (field 'id' returns Int but has selections [something, someFields])",
      "locations"=>[{"line"=>5, "column"=>47}]
    }
    assert_includes(errors, illegal_selection_error, 'finds illegal selections on scalarss')

    selection_required_error = {
      "message"=>"Objects must have selections (field 'cheese' returns Cheese but has no selections)",
      "locations"=>[{"line"=>4, "column"=>7}]
    }
    assert_includes(errors, selection_required_error, 'finds objects without selections')
  end
end