def test_can_create_empty(self):
m = MigrationList()
assert list(m) == []
def test_cannot_create_with_duplicate_ids(self):
with pytest.raises(exceptions.MigrationConflict):
MigrationList([Mock(id=1), Mock(id=1)])
def test_cannot_overwrite_slice_with_conflicting_ids(self):
m = MigrationList([Mock(id=n) for n in range(10)])
with pytest.raises(exceptions.MigrationConflict):
m[1:3] = [Mock(id=4)]
def test_can_overwrite_slice_with_same_ids(self):
m = MigrationList([Mock(id=n) for n in range(10)])
m[1:3] = [Mock(id=2), Mock(id=1)]
def test_deletion_allows_reinsertion(self):
m = MigrationList([Mock(id=n) for n in range(10)])
del m[0]
m.append(Mock(id=0))
def test_cannot_append_duplicate_id(self):
m = MigrationList([Mock(id=n) for n in range(10)])
with pytest.raises(exceptions.MigrationConflict):
m.append(Mock(id=1))
def test_can_append_new_id(self):
m = MigrationList([Mock(id=n) for n in range(10)])
m.append(Mock(id=10))