require 'spec_helper'
require 'rails/generators'
require 'rails/generators/migration'
require 'generators/data_migration/data_migration_generator'

describe DataMigrate::Generators::DataMigrationGenerator do
  subject { DataMigrate::Generators::DataMigrationGenerator }

  describe :next_migration_number do
    it "next migration" do
      Timecop.freeze("2016-12-03 22:15:26 -0800") do
        if ActiveRecord.version >= Gem::Version.new('7.0')
          expect(ActiveRecord).to receive(:timestamped_migrations) { true }
        else
          expect(ActiveRecord::Base).to receive(:timestamped_migrations) { true }
        end
        expect(subject.next_migration_number(1).to_s).to eq("20161204061526")
      end
    end
  end

  describe :migration_base_class_name do
    subject { generator.send(:migration_base_class_name) }

    let(:generator) { DataMigrate::Generators::DataMigrationGenerator.new(['my_migration']) }

    it "returns the correct base class name" do
      is_expected.to eq("ActiveRecord::Migration[#{ActiveRecord::Migration.current_version}]")
    end
  end

  describe :create_data_migration do
    subject { DataMigrate::Generators::DataMigrationGenerator.new(['my_migration']) }

    let(:data_migrations_file_path) { 'abc/my_migration.rb' }

    context 'when custom data migrations path has a trailing slash' do
      before do
        DataMigrate.config.data_migrations_path = 'abc/'
      end

      it 'returns correct file path' do
        is_expected.to receive(:migration_template).with(
          'data_migration.rb', data_migrations_file_path
        )

        subject.create_data_migration
      end
    end

    context 'when custom data migrations path does not have a trailing slash' do
      before do
        DataMigrate.config.data_migrations_path = 'abc'
      end

      it 'returns correct file path' do
        is_expected.to receive(:migration_template).with(
          'data_migration.rb', data_migrations_file_path
        )

        subject.create_data_migration
      end
    end
  end

  describe ".source_root" do
    subject { described_class.source_root }

    let(:default_source_root) do
      File.expand_path(
        File.dirname(File.join(DataMigrate.root, "generators", "data_migration", "templates", "data_migration.rb"))
      )
    end

    it { is_expected.to eq default_source_root }

    context "when DateMigrate.config.data_template_path is set" do
      before do
        @before = DataMigrate.config.data_template_path
        DataMigrate.configure do |config|
          config.data_template_path = data_template_path
        end
      end

      let(:data_template_path) do
        File.join(DataMigrate.root, "generators", "data_migration", "templates", "data_migration.rb")
      end
      let(:expected_source_root) { File.dirname(data_template_path) }

      after do
        DataMigrate.configure do |config|
          config.data_template_path = @before
        end
      end

      it "reads directory from config data template path" do
        is_expected.to eq expected_source_root
      end
    end
  end
end