Fixed some bugs and added new tests

New test_multi_03 can be used to test multiple variables at once. Based on new collect function that can be used to collect n variables from parsed Ziffers.

tests/test_scale_01.py

@@ -0,0 +1,51 @@
+""" Tests for the scale module """
+import pytest
+from ziffers import scale
+
+@pytest.mark.parametrize(
+    "name,expected",
+    [
+        ("C4", 60),
+        ("A1", 33),
+        ("Bb3", 58),
+        ("C#1", 25),
+        ("foo", 60),
+    ],
+)
+def test_notenames(name: str, expected: int):
+    assert scale.note_name_to_midi(name) == expected
+
+
+@pytest.mark.parametrize(
+    "pitch_classes,expected",
+    [
+        (
+            list(range(-9, 10)),
+            [
+                45,
+                47,
+                48,
+                50,
+                52,
+                53,
+                55,
+                57,
+                59,
+                60,
+                62,
+                64,
+                65,
+                67,
+                69,
+                71,
+                72,
+                74,
+                76,
+            ],
+        ),
+    ],
+)
+def test_note_to_midi(pitch_classes: str, expected: int):
+    assert [
+        scale.note_from_pc(root=60, pitch_class=val, intervals="Ionian") for val in pitch_classes
+    ] == expected