new_contents: import pytest
  
  from music_basics import Note
  
  # Manual note creation - correct values
  def test_manual_note_creation_correct_pitch_uppercase():
      n = Note('A', 4, 'bb')
      assert n.pitch == 'A'
  
  def test_manual_note_creation_correct_pitch_lowercase():
      n = Note('b', 4, 'b')
      assert n.pitch == 'B'
  
  def test_manual_note_creation_correct_octave():
      n = Note('A', 4, '##')
      assert n.octave == 4
  
  def test_manual_note_creation_correct_accidentals():
      n = Note('A', 4, '#')
      assert n.accidental == '#'
  
  def test_manual_note_creation_no_accidentals():
      n = Note('A', 4)
      assert n.accidental is None
  
  # Note creation from note string - correct values
  def test_note_creation_correct_pitch_uppercase():
      n = Note.from_note_string('A4bb')
      assert n.pitch == 'A'
  
  def test_note_creation_correct_pitch_lowercase():
      n = Note.from_note_string('b4b')
      assert n.pitch == 'B'
  
  def test_note_creation_correct_octave():
      n = Note.from_note_string('A4##')
      assert n.octave == 4
  
  def test_note_creation_correct_accidentals():
      n = Note.from_note_string('A4#')
      assert n.accidental == '#'
  
  def test_manual_note_creation_no_accidentals():
      n = Note.from_note_string('A4')
      assert n.accidental is None
  
  # Manual note creation - invalid values
  def test_manual_note_creation_incorrect_pitch_uppercase():
      with pytest.raises(ValueError):
          n = Note('X', 4, 'bb')
  
  def test_manual_note_creation_incorrect_pitch_lowercase():
      with pytest.raises(ValueError):
          n = Note('p', 4, 'b')
  
  def test_manual_note_creation_invalid_octave():
      with pytest.raises(ValueError):
          n = Note('A', 'y', '##')
  
  def test_manual_note_creation_incorrect_octave_decimal():
      with pytest.raises(ValueError):
          n = Note('A', 5.5, '##')
  
  def test_manual_note_creation_incorrect_octave_low():
      with pytest.raises(ValueError):
          n = Note('A', -2, '##')
  
  def test_manual_note_creation_incorrect_octave_high():
      with pytest.raises(ValueError):
          n = Note('A', 10, '##')
      
  def test_manual_note_creation_incorrect_accidentals_too_many():
      with pytest.raises(ValueError):
          n = Note('A', 4, '###')
  
  def test_manual_note_creation_incorrect_accidentals_wrong_symbols():
      with pytest.raises(ValueError):
          n = Note('A', 4, '*')
  
  # Note creation from note string - invalid values
  def test_note_creation_incorrect_pitch_uppercase():
      with pytest.raises(ValueError):
          n = Note.from_note_string('X4bb')
  
  def test_note_creation_incorrect_pitch_lowercase():
      with pytest.raises(ValueError):
          n = Note.from_note_string('p4b')
  
  def test_note_creation_invalid_octave():
      with pytest.raises(ValueError):
          n = Note.from_note_string('Ay##')
  
  def test_note_creation_incorrect_octave_decimal():
      with pytest.raises(ValueError):
          n = Note.from_note_string('A5.5##')
  
  def test_note_creation_incorrect_octave_low():
      with pytest.raises(ValueError):
          n = Note.from_note_string('A-2##')
  
  def test_note_creation_incorrect_octave_high():
      with pytest.raises(ValueError):
          n = Note.from_note_string('A10##')
      
  def test_note_creation_incorrect_accidentals_too_many():
      with pytest.raises(ValueError):
          n = Note.from_note_string('A4###')
  
  def test_note_creation_incorrect_accidentals_wrong_symbols():
      with pytest.raises(ValueError):
          n = Note.from_note_string('A4*')
  
  def test_note_creation_no_pitch():
      with pytest.raises(ValueError):
          n = Note.from_note_string('4bb')
  
  def test_note_creation_no_octave():
      with pytest.raises(ValueError):
          n = Note.from_note_string('C#')
  
subject: Add tests for Note constructor (n.b. some currently failing).