require 'spec_helper'

describe FBO::RemoteFile do
  let(:date)     { Date.parse("2013-03-31") }
  let(:filename) { FBO::RemoteFile.filename_for_date(date) }
  let(:tmp_dir)  { File.join(File.dirname(__FILE__), "..", "fixtures") }
  let(:ftp)      { mock("Net::FTP", login: nil, getbinaryfile: nil, close: nil) }

  before do
    Net::FTP.stub(:new).and_return(ftp)
  end

  describe "class methods" do
    describe "for_date" do
      it "should raise an error if no date is given" do
        expect { FBO::RemoteFile.for_date(nil) }.to raise_error
      end

      it "should return an instance of FBO::RemoteFile" do
        remote_file = FBO::RemoteFile.for_date(date, tmp_dir: tmp_dir)
        remote_file.should be_an FBO::RemoteFile
      end
    end
  end

  context "everything is great" do
    subject  { FBO::RemoteFile.new(filename, tmp_dir: tmp_dir) }

    it "should attempt to fetch the file via FTP" do
      ftp.should_receive(:login).ordered
      ftp.should_receive(:getbinaryfile).ordered
      ftp.should_receive(:close).ordered
      subject
    end

    it "should be possible to open the file and read its contents" do
      subject.readline.should_not be_nil
    end
  end

  context "temporary directory doesn't exist" do
    subject  { FBO::RemoteFile.new(filename, tmp_dir: "foo/bar") }

    before do
      Dir.stub(:exists?).and_return(false)
      Dir.stub(:mkdir)
      File.stub(:new)
    end

    it "should create the temporary directory" do
      Dir.should_receive(:mkdir).with("foo/bar")
      subject
    end
  end
end