Fix: typo in data_utils (#56)

A typo in `generate_preprocess_data` was spotted, due to a wrong given type.

src/aiida_phonopy/calculations/functions/data_utils.py

@@ -57,7 +57,7 @@ def generate_preprocess_data(
     supercell_matrix: orm.List | None = None,
     primitive_matrix: orm.List | None = None,
     symprec: orm.Float | None = None,
-    is_symmetry: orm.Float | None = None,
+    is_symmetry: orm.Bool | None = None,
     distinguish_kinds: orm.Bool | None = None,
 ):
     """Return a complete stored PreProcessData node.

tests/calculations/functions/test_data_utils.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+"""Tests for :mod:`calculations.functions.data_utils`."""
+from aiida import orm
+
+
+def test_generate_preprocess_data(generate_structure):
+    """Test the `generate_preprocess_data` calcfunction."""
+    from aiida_phonopy.calculations.functions.data_utils import generate_preprocess_data
+
+    inputs = {
+        'structure': generate_structure(),
+        'displacement_generator': orm.Dict({'distance': 0.001}),
+        'symprec': orm.Float(1e-4),
+        'is_symmetry': orm.Bool(False),
+        'distinguish_kinds': orm.Bool(True),
+        'supercell_matrix': orm.List([[1, 0, 0], [0, 1, 0], [0, 0, 1]]),
+        'primitive_matrix': orm.List([[1, 0, 0], [0, 1, 0], [0, 0, 1]]),
+    }
+    generate_preprocess_data(**inputs)