Exercise the new getters in the Python tests

tests/test_import.py

@@ -19,6 +19,9 @@ def test_import_new():
     assert pathlib.Path(r.config.classes_path) == invpath / "classes"
     assert r.config.ignore_class_notfound
 
+    assert r.nodes is not None
+    assert r.classes is not None
+
 
 def test_import_raises():
     with pytest.raises(ValueError) as exc:

tests/test_inventory.py

@@ -70,6 +70,26 @@ def test_inventory():
         inventory_path="./tests/inventory",
         ignore_class_notfound=True,
     )
+    assert set(r.nodes.keys()) == expected_nodes
+    included_classes = set(expected_classes.keys())
+    all_classes = set(r.classes.keys())
+    # discovered classes which aren't shown with their resolved names in the output:
+    assert all_classes - included_classes == {
+        "${baz}",  # appears as `\\${baz}`
+        "cluster.foo",  # appears as `cluster.${dist}`
+        "config_symlink",  # doesn't appear
+        "foo.bar",  # appears as `${tenant}.${cluster}`
+    }
+    # class includes which aren't shown in their resolved form:
+    assert included_classes - all_classes == {
+        "${cls9}",  # resolved as `cls9` for n15
+        "${qux}",  # resolved as `cls1` for n4
+        "${tenant}.${cluster}",  # resolved as `foo.bar` for n16
+        "\\${baz}",  # resolved as `${baz}` for n17
+        "cluster.${dist}",  # resolved as `cluster.foo` for n19
+        "nonexisting",  # skipped because ignore_class_notfound=True
+    }
+
     inv = r.inventory()
 
     assert set(inv.nodes.keys()) == expected_nodes