RSpec.describe SerializationHelper::Base do
  def prestub_active_record
  end

  before do
    @io = StringIO.new
    allow(ActiveRecord::Base).to receive(:connection).and_return(double('connection'))
    allow(ActiveRecord::Base.connection).to receive(:tables).and_return([ 'mytable', 'schema_info', 'schema_migrations' ])
  end

  def stub_helper!
    @helper = double("MyHelper")
    @dumper = double("MyDumper");
    @loader = double("MyLoader");
    allow(@helper).to receive(:dumper).and_return(@dumper)
    allow(@helper).to receive(:loader).and_return(@loader)
    allow(@helper).to receive(:extension).and_return("yml")
    allow(@dumper).to receive(:tables).and_return([ActiveRecord::Base.connection.tables[0]])
    allow(@dumper).to receive(:before_table).and_return(nil)
    allow(@dumper).to receive(:after_table).and_return(nil)
  end

  context "for multi-file dumps" do
    before do
      expect(File).to receive(:new).once.with("dir_name/mytable.yml", "w").and_return(@io)
      expect(Dir).to receive(:mkdir).once.with("dir_name")
      stub_helper!
      expect(@dumper).to receive(:dump_table).once.with(@io, "mytable")
    end

    it "should create the number of files that there are tables" do
       SerializationHelper::Base.new(@helper).dump_to_dir "dir_name"
    end

  end

  context "for multi-file loads" do
    before do
      stub_helper!
      expect(@loader).to receive(:load).once.with(@io, true)
      expect(File).to receive(:new).once.with("dir_name/mytable.yml", "r").and_return(@io)
      allow(Dir).to receive(:entries).and_return(["mytable.yml"])
    end

    it "should insert into then umber of tables that there are files" do
      SerializationHelper::Base.new(@helper).load_from_dir "dir_name"
    end
  end

end