require_relative '../../spec_helper'
require_relative 'fixtures/common'

describe "Dir.foreach" do
  before :all do
    DirSpecs.create_mock_dirs
  end

  after :all do
    DirSpecs.delete_mock_dirs
  end

  it "yields all names in an existing directory to the provided block" do
    a, b = [], []

    Dir.foreach(DirSpecs.mock_dir) {|f| a << f}
    Dir.foreach("#{DirSpecs.mock_dir}/deeply/nested") {|f| b << f}

    a.sort.should == DirSpecs.expected_paths
    b.sort.should == %w|. .. .dotfile.ext directory|
  end

  it "returns nil when successful" do
    Dir.foreach(DirSpecs.mock_dir) {|f| f}.should == nil
  end

  it "calls #to_path on non-String arguments" do
    p = mock('path')
    p.should_receive(:to_path).and_return(DirSpecs.mock_dir)
    Dir.foreach(p).to_a
  end

  it "raises a SystemCallError if passed a nonexistent directory" do
    -> { Dir.foreach(DirSpecs.nonexistent) {} }.should.raise(SystemCallError)
  end

  it "returns an Enumerator if no block given" do
    Dir.foreach(DirSpecs.mock_dir).should.instance_of?(Enumerator)
    Dir.foreach(DirSpecs.mock_dir).to_a.sort.should == DirSpecs.expected_paths
  end

  it "accepts an encoding keyword for the encoding of the entries" do
    dirs = Dir.foreach("#{DirSpecs.mock_dir}/deeply/nested", encoding: "utf-8").to_a.sort
    dirs.each { |dir| dir.encoding.should == Encoding::UTF_8 }

    dirs = Dir.foreach("#{DirSpecs.mock_dir}/deeply/nested", encoding: Encoding::ISO_8859_1).to_a.sort
    dirs.each { |dir| dir.encoding.should == Encoding::ISO_8859_1 }

    Dir.foreach("#{DirSpecs.mock_dir}/deeply/nested", encoding: Encoding::ISO_8859_1) do |f|
      f.encoding.should == Encoding::ISO_8859_1
    end
  end

  describe "when no block is given" do
    it "returns an Enumerator" do
      Dir.foreach(DirSpecs.mock_dir).should.instance_of?(Enumerator)
      Dir.foreach(DirSpecs.mock_dir).to_a.sort.should == DirSpecs.expected_paths
    end

    describe "returned Enumerator" do
      describe "size" do
        it "should return nil" do
          Dir.foreach(DirSpecs.mock_dir).size.should == nil
        end
      end
    end
  end
end
