music_spec.rb

require_relative 'music'

describe "music kata" do
  it "models octaves" do
    Notes.c(:simple, 1).pitch.should == 4
    Notes.c(:simple, 2).pitch.should == 16
    Notes.c(:simple, 8).pitch.should == 88
  
    Notes.e(:simple, 1).pitch.should == 8
  end

  it "models accidentals" do
    Notes.c(:sharp, 1).pitch.should == 5
    Notes.c(:flat, 1).pitch.should == 3
    Notes.c(:sharp, 6).pitch.should == 65
  end

  it "models frequencies" do
    Notes.c(:simple, 1).frequency.should == 32.7032
    Notes.c(:sharp, 1).frequency.should == 34.6478
    Notes.c(:simple, 8).frequency.should == 4186.009
  end
  
  it "models intervals" do
    Interval.between(Notes.c(:simple, 1), Notes.e(:simple, 1)).should == :major_third
    Interval.between(Notes.c(:simple, 1), Notes.e(:flat, 1)).should == :minor_third
  end
end

describe "roots" do
  it "models roots" do 
    Roots.rootn(16, 4).should == 2
  end
end