test('be able to be transformed into drop 2 chords', () => {
    const chord = new ClosedChord(Pitch.C, ChordPattern.Major7, Duration.Quarter, Octave.C4);

    const expectedPitches = [Pitch.C, Pitch.G, Pitch.B, Pitch.E];
    expect(Array.from(chord.drop2())).toStrictEqual(expectedPitches);