test('Have expected pitches for C-Maj9 chord', () => {
      const expectedPitches = [Pitch.C, Pitch.EFlat, Pitch.G, Pitch.B, Pitch.D];
      const chordPitches = Array.from(
        new ClosedChord(Pitch.C, ChordPattern.MinorMaj9, Duration.Quarter, Octave.C4)
      );