require File.dirname(__FILE__) + '/../../lib/mp3file'
require File.dirname(__FILE__) + '/../common_helpers'

include CommonHelpers

describe Mp3file::MP3File do
  describe "A 96 kbps 32 kHz Joint Stereo CBR file without a Xing header or any ID3 tags" do
    path = fixture_file("bret_96_no_xing.mp3")
    subject { Mp3file::MP3File.new(path) }

    its(:id3v2tag?) { should == false }
    its(:id3v1tag?) { should == false }
    its("file.path") { should == path.to_s }
    its("file.closed?") { should == true }
    its(:file_size) { should == path.size }
    its(:audio_size) { should == path.size }
    its(:first_header_offset) { should == 0 }
    its(:mpeg_version) { should == 'MPEG 1' }
    its(:layer) { should == 'Layer III' }
    its(:bitrate) { should == 96 }
    its(:samplerate) { should == 32000 }
    its(:mode) { should == 'Joint Stereo' }
    its(:num_frames) { should == 140 }
    its(:total_samples) { should == 161280 }
    its(:length) { should == 5.04 }
    its(:vbr?) { should == false }
  end

  describe "A 96 kbps 32 kHz Joint Stereo CBR file with a Xing \"Info\" header and no ID3 tags" do
    path = fixture_file("bret_96.mp3")
    subject { Mp3file::MP3File.new(path) }

    its(:id3v2tag?) { should == false }
    its(:id3v1tag?) { should == false }
    its("file.path") { should == path.to_s }
    its("file.closed?") { should == true }
    its(:file_size) { should == path.size }
    its(:audio_size) { should == path.size }
    its(:first_header_offset) { should == 0 }
    its(:mpeg_version) { should == 'MPEG 1' }
    its(:layer) { should == 'Layer III' }
    its(:bitrate) { should == 96 }
    its(:samplerate) { should == 32000 }
    its(:mode) { should == 'Joint Stereo' }
    its(:num_frames) { should == 140 }
    its(:total_samples) { should == 161280 }
    its(:length) { should == 5.04 }
    its(:vbr?) { should == false }
  end

  describe "a 44.1 kHz Stereo VBR file with an average bitrate of 130 kbps without any ID3 tags" do
    path = fixture_file("bret_vbr_6.mp3")
    subject { Mp3file::MP3File.new(path) }

    its(:id3v2tag?) { should == false }
    its(:id3v1tag?) { should == false }
    its("file.path") { should == path.to_s }
    its("file.closed?") { should == true }
    its(:file_size) { should == path.size }
    its(:audio_size) { should == 81853 }
    its(:first_header_offset) { should == 0 }
    its(:mpeg_version) { should == 'MPEG 1' }
    its(:layer) { should == 'Layer III' }
    its(:bitrate) { should be_within(0.005).of(129.88) }
    its(:samplerate) { should == 44100 }
    its(:mode) { should == 'Stereo' }
    its(:num_frames) { should == 193 }
    its(:total_samples) { should == 222336 }
    its(:length) { should be_within(0.005).of(5.04) }
    its(:vbr?) { should == true }
  end

  describe "A 96 kbps 32 kHz CBR file with no Xing header and only an ID3v1 tag" do
    subject { Mp3file::MP3File.new(fixture_file('bret_id3v1_no_xing.mp3')) }
    its(:id3v2tag?) { should == false }
    its(:id3v1tag?) { should == true }
    its(:audio_size) { should == 60480 }
    its(:first_header_offset) { should == 0 }
    its(:mpeg_version) { should == 'MPEG 1' }
    its(:layer) { should == 'Layer III' }
    its(:bitrate) { should == 96 }
    its(:samplerate) { should == 32000 }
    its(:mode) { should == 'Joint Stereo' }
    its(:num_frames) { should == 140 }
    its(:total_samples) { should == 161280 }
    its(:length) { should be_within(0.005).of(5.04) }
    its(:vbr?) { should == false }
    its('id3v1_tag.artist') { should == 'Cracker' }
    its(:title) { should == 'Hey Bret (You Know What Time I' }
    its(:album) { should == 'Sunrise in the Land of Milk an' }
    its(:comment) { should == 'For testing the mp3file gem' }
    its(:year) { should == '2009' }
    its(:track) { should == 9 }
    its(:genre) { should == 'Rock' }
  end

  describe "A 96 kbps 32 kHz CBR file with a Xing \"Info\" header and only an ID3v1 tag" do
    subject { Mp3file::MP3File.new(fixture_file('bret_id3v1.mp3')) }
    its(:id3v2tag?) { should == false }
    its(:id3v1tag?) { should == true }
    its(:audio_size) { should == 60912 }
    its(:first_header_offset) { should == 0 }
    its(:mpeg_version) { should == 'MPEG 1' }
    its(:layer) { should == 'Layer III' }
    its(:bitrate) { should == 96 }
    its(:samplerate) { should == 32000 }
    its(:mode) { should == 'Joint Stereo' }
    its(:num_frames) { should == 140 }
    its(:total_samples) { should == 161280 }
    its(:length) { should be_within(0.005).of(5.04) }
    its(:vbr?) { should == false }
    its('id3v1_tag.artist') { should == 'Cracker' }
    its(:title) { should == 'Hey Bret (You Know What Time I' }
    its(:album) { should == 'Sunrise in the Land of Milk an' }
    its(:comment) { should == 'For testing the mp3file gem' }
    its(:year) { should == '2009' }
    its(:track) { should == 9 }
    its(:genre) { should == 'Rock' }
  end

  describe "A 96 kbps 34 kHz Joint Stereo CBR file with a Xing \"Info\" header and an ID3v2 tag" do
    subject { Mp3file::MP3File.new(fixture_file('bret_id3v2.mp3')) }
    its(:id3v2tag?) { should == true }
    its(:id3v1tag?) { should == false }
    its("file.path") { should == fixture_file('bret_id3v2.mp3').to_s }
    its("file.closed?") { should == true }
    its(:file_size) { should == fixture_file('bret_id3v2.mp3').size }
    its(:audio_size) { should == 60912 }
    its(:first_header_offset) { should == 528 }
    its(:mpeg_version) { should == 'MPEG 1' }
    its(:layer) { should == 'Layer III' }
    its(:bitrate) { should == 96 }
    its(:samplerate) { should == 32000 }
    its(:mode) { should == 'Joint Stereo' }
    its(:num_frames) { should == 140 }
    its(:total_samples) { should == 161280 }
    its(:length) { should == be_within(0.001).of(5.04) }
    its(:vbr?) { should == false }
  end

  describe "A file consisting only of zeroes" do
    it "raises an error" do
      lambda { Mp3file::MP3File.new(fixture_file('zeroes.mp3')) }.
        should(raise_error(Mp3file::InvalidMP3FileError))
    end
  end
end