Contents

require File.expand_path(File.dirname(__FILE__) + '/spec_helper')

describe Meter do
  describe '#initialize' do
    it 'should assign beats per measure and beat duration' do
      [[4,"1/4".to_r],[3,"1/4".to_r],[6,"1/8".to_r]].each do |bpm,bd|
        m = Meter.new(bpm,bd)
        m.beats_per_measure.should eq bpm
        m.beat_duration.should eq bd
      end      
    end
    
    it 'should derive measure duration' do
      {
        [4,"1/4".to_r] => "1/1".to_r,
        [3,"1/4".to_r] => "3/4".to_r,
        [6,"1/8".to_r] => "6/8".to_r,
        [12,"1/8".to_r] => "12/8".to_r,
      }.each do |bpm,bd|
        m = Meter.new(bpm,bd)
        m.measure_duration.should eq(bpm*bd)
      end      
    end
  end
  
  describe '#==' do
    context 'meters with same beat duration and beats per measure' do
      it 'should return true' do
        m1 = Meter.new(4,"1/4".to_r)
        m2 = Meter.new(4,"1/4".to_r)
        m1.should eq m2
      end
    end
    
    context 'meters with same meausre duration but different beat duration' do
      it 'should return false' do
        m1 = Meter.new(4,"1/4".to_r)
        m2 = Meter.new(2,"1/2".to_r)
        m1.should_not eq m2
      end
    end
  end
  
  describe '#to_yaml' do
    it 'should produce YAML that can be loaded' do
      m = Meter.new(4,"1/4".to_r)
      YAML.load(m.to_yaml).should eq m
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
music-transcription-0.7.1	spec/meter_spec.rb