py: boolean-mask keys raise NotImplementedError, not TypeError

h5py supports boolean masks for reads and writes; clawhdf5 supports
neither, so a mask is an unsupported operation (NotImplementedError, as
for every other edit the bindings cannot do), not an invalid key.

Tests: test_unsupported_edits_are_clear_errors (1-D, N-D and per-axis
mask writes, file unchanged) and test_boolean_masks_are_refused (reads).

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

crates/clawhdf5-py/tests/test_edit.py

@@ -643,6 +643,13 @@ def test_unsupported_edits_are_clear_errors(h5py, tmp_path):
             f["chunk_ext"].resize(3, axis=2)
         with pytest.raises(TypeError):
             f["i4"][0] = np.array(["a"] * 10)
+        # h5py writes through boolean masks; clawhdf5 does not.
+        with pytest.raises(NotImplementedError, match="mask"):
+            f["u1"][np.arange(16) % 2 == 0] = 5
+        with pytest.raises(NotImplementedError, match="mask"):
+            f["i4"][f["i4"][()] > 30] = 0
+        with pytest.raises(NotImplementedError, match="mask"):
+            f["i4"][np.ones(6, dtype=bool), 2] = 0
     assert snapshot(h5py, path) == before
     h5dump_reads(path)
 

crates/clawhdf5-py/tests/test_read_vs_h5py.py

@@ -440,7 +440,7 @@ def test_unsupported_types_are_errors_not_data(pair):
 
 def test_boolean_masks_are_refused(pair):
     ours, _, _ = pair
-    with pytest.raises(TypeError):
+    with pytest.raises(NotImplementedError, match="mask"):
         ours["num/le_i4_1d"][np.ones(37, dtype=bool)]