Fix base and add test

neurom/core/types.py

@@ -94,9 +94,17 @@ def _ids_to_index(ids, base):
     def _index_to_ids(index, base):
         """Convert a linear index into ids on a square grid with side 'base'."""
         # find number of integers in linear index
-        n_digits = math.ceil(len(str(index)) / max(1, len(str(base)) - 1))
+        if index > 1:
+            ratio = math.log(index) / math.log(base)
+            n_digits = math.ceil(ratio)
+            if int(ratio) == n_digits:
+                n_digits += 1
+        elif index == 1:
+            n_digits = 1
+        else:
+            return [0]
 
-        int_types = np.trim_zeros(np.unravel_index(index, shape=(base,) * n_digits))
+        int_types = np.unravel_index(index, shape=(base,) * n_digits)
 
         if _ALL_SUBTYPE in int_types and len(int_types) > 1:
             raise NeuroMError(
@@ -228,9 +236,8 @@ def _enum_accept_undefined(cls, value):
             return cls._member_map_[value]
 
     # SectionType or raw integer
-    elif isinstance(value, collections.abc.Hashable):
-        if value in cls._value2member_map_:
-            return cls._value2member_map_[value]
+    elif isinstance(value, collections.abc.Hashable) and value in cls._value2member_map_:
+        return cls._value2member_map_[value]
 
     # Composite type or unhashable type (e.g. list)
     else:

tests/test_mixed.py

@@ -119,6 +119,31 @@ def test_integer_behavior(self):
         assert SubtypeCollection(2) * 2 == 4
         assert SubtypeCollection(2) / 2 == 1
 
+    @pytest.mark.parametrize("base", [2, 3, 11, 99, 100])
+    def test_base(self, monkeypatch, base):
+        monkeypatch.setattr(SubtypeCollection, "_BASE", base)
+
+        def int_to_base(value, base):
+            """Convert an integer into a list of numbers in the given base."""
+            digits = []
+            while value:
+                digits.append(int(value % base))
+                value = value // base
+            if not digits:
+                digits = [0]
+            return digits[::-1]
+
+        SubtypeCollection(0).subtypes == [0]
+        SubtypeCollection(1).subtypes == [1]
+        SubtypeCollection(5).subtypes == int_to_base(5, base)
+        SubtypeCollection(7).subtypes == int_to_base(7, base)
+        SubtypeCollection(11).subtypes == int_to_base(11, base)
+        SubtypeCollection(23).subtypes == int_to_base(23, base)
+        SubtypeCollection(99).subtypes == int_to_base(99, base)
+        SubtypeCollection(100).subtypes == int_to_base(100, base)
+        SubtypeCollection(101).subtypes == int_to_base(101, base)
+        SubtypeCollection(10101).subtypes == int_to_base(10101, base)
+
 
 class TestNeuriteType:
     def test_repr(self):
@@ -217,6 +242,16 @@ def test_eq(self):
         assert NeuriteType.axon_carrying_dendrite != SubtypeCollection(NeuriteType.apical_dendrite)
 
     def test_raise(self):
+        NeuriteType("all")
+        NeuriteType((3, 2))
+        with pytest.raises(ValueError, match="None is not a valid registered NeuriteType"):
+            NeuriteType(None)
+        with pytest.raises(
+            ValueError, match="{'WRONG TYPE': 999} is not a valid registered NeuriteType"
+        ):
+            NeuriteType({"WRONG TYPE": 999})
+        with pytest.raises(ValueError, match="UNKNOWN VALUE is not a valid registered NeuriteType"):
+            NeuriteType("UNKNOWN VALUE")
         with pytest.raises(ValueError, match=r"\[2, 3, 4\] is not a valid registered NeuriteType"):
             NeuriteType([2, 3, 4])