require "spec_helper"

describe Alephant::Preview::FixtureLoader do
  let (:fixtures_base) { File.join(File.dirname(__FILE__), "fixtures") }
  let (:base_path) { File.join(fixtures_base, "components", "bar") }
  subject { described_class.new(base_path) }

  describe ".new" do
    context "using valid parameters" do
      let (:expected) { described_class }

      specify { expect(subject).to be_a expected }
    end
  end

  describe "#get" do
    let (:uri) { "/test/uri" }

    context "with a single fixture" do
      let (:fixture_data) { File.open(File.join(fixtures_base, "components", "bar", "fixtures", "bar.json")).read }
      specify { expect(subject.get(uri).body).to eq fixture_data }
    end

    context "with multiple fixtures" do
      let (:base_path) { File.join(fixtures_base, "components", "baz") }
      let (:fixture_data) do
        fixtures = Dir.glob(File.join(fixtures_base, "components", "baz", "fixtures", "*"))
        fixtures.map { |fixture| File.open(fixture).read }
      end

      context "using a valid amount of fixtures" do
        it "should return each fixture on subsequent calls" do
          (0..2).each do |index|
            expect(subject.get(uri).body).to eq fixture_data[index]
          end
        end
      end

      context "using incorrect amount of fixtures" do
        it "should raise an exception" do
          (0..2).each { |_index| subject.get(uri).body }
          expect do
            subject.get(uri).body
          end.to raise_error(
            RuntimeError, "There isn't a fixture matching the request call, please add one"
          )
        end
      end
    end
  end
end