require "spec_helper"

describe GraphQL::StaticValidation::FieldsAreDefinedOnType do
  include StaticValidationHelpers
  let(:query_string) { "
    query getCheese {
      notDefinedField { name }
      cheese(id: 1) { nonsenseField, flavor ...cheeseFields }
      fromSource(source: COW) { bogusField }
    }

    fragment cheeseFields on Cheese { fatContent, hogwashField }
  "}

  it "finds fields that are requested on types that don't have that field" do
    expected_errors = [
      "Field 'notDefinedField' doesn't exist on type 'Query'",  # from query root
      "Field 'nonsenseField' doesn't exist on type 'Cheese'",   # from another field
      "Field 'bogusField' doesn't exist on type 'Cheese'",      # from a list
      "Field 'hogwashField' doesn't exist on type 'Cheese'",    # from a fragment
    ]
    assert_equal(expected_errors, error_messages)
  end

  describe "on objects" do
    let(:query_string) { "query getStuff { notDefinedField }"}

    it "finds invalid fields" do
      expected_errors = [
        {
          "message"=>"Field 'notDefinedField' doesn't exist on type 'Query'",
          "locations"=>[{"line"=>1, "column"=>18}],
          "fields"=>["query getStuff", "notDefinedField"],
        }
      ]
      assert_equal(expected_errors, errors)
    end
  end

  describe "on interfaces" do
    let(:query_string) { "query getStuff { favoriteEdible { amountThatILikeIt } }"}

    it "finds invalid fields" do
      expected_errors = [
        {
          "message"=>"Field 'amountThatILikeIt' doesn't exist on type 'Edible'",
          "locations"=>[{"line"=>1, "column"=>35}],
          "fields"=>["query getStuff", "favoriteEdible", "amountThatILikeIt"],
        }
      ]
      assert_equal(expected_errors, errors)
    end
  end

  describe "on unions" do
    let(:query_string) { "
      query notOnUnion { favoriteEdible { ...dpFields ...dpIndirectFields } }
      fragment dpFields on DairyProduct { source }
      fragment dpIndirectFields on DairyProduct { ... on Cheese { source } }
    "}


    it "doesnt allow selections on unions" do
      expected_errors = [
        {
          "message"=>"Selections can't be made directly on unions (see selections on DairyProduct)",
          "locations"=>[
            {"line"=>3, "column"=>7}
          ],
          "fields"=>["fragment dpFields", "source"],
        }
      ]
      assert_equal(expected_errors, errors)
    end
  end
end