def test_pattern_cannot_be_attached_to_multiple_projects():
empty_pattern = Pattern(tracks=1, lines=4)
project = Project()
project.attach_pattern(empty_pattern)
project2 = Project()
with pytest.raises(PatternOwnershipError):
project2.attach_pattern(empty_pattern)
def test_note_belongs_to_project_of_pattern():
empty_pattern = Pattern(tracks=1, lines=4)
note = empty_pattern.data[0][0]
assert note.project is None
project = Project()
project.attach_pattern(empty_pattern)
assert note.project is project
def test_note_mod_property():
project = Project()
pattern = Pattern(tracks=1, lines=4)
project.attach_pattern(pattern)
note = pattern.data[0][0]
assert note.module == 0
assert note.module_index is None
assert note.mod is None
mod: m.Generator = project.new_module(m.Generator)
note.mod = mod
assert note.mod is mod
assert note.module_index == mod.index
assert note.module == mod.index + 1
note.module = 5
assert note.mod is None
assert note.module_index == 4
def test_pattern_project_is_set_after_attaching():
empty_pattern = Pattern(tracks=1, lines=4)
project = Project()
project.attach_pattern(empty_pattern)
assert empty_pattern.project is project