🚚 restructured tests directories

Author: jorenham

tests/.ruff.toml

@@ -0,0 +1,6 @@
+extend = "../pyproject.toml"
+
+[lint]
+extend-ignore = [
+  "INP001", # https://docs.astral.sh/ruff/rules/implicit-namespace-package/
+]

tests/__init__.py

@@ -15,31 +15,31 @@ class CheckableHasArrayNamespace(xpt.HasArrayNamespace, Protocol):
 class GoodArray:
     """Example class that implements the HasArrayNamespace protocol."""
 
-    def __array_namespace__(self) -> object:  # noqa: PLW3201
+    def __array_namespace__(self) -> object:
         return SimpleNamespace()
 
 
 class BadArray:
     """Example class that does not implement the HasArrayNamespace protocol."""
 
 
-def test_has_namespace_class():
+def test_has_namespace_class() -> None:
     """Test that GoodArray is a subclass of HasArrayNamespace."""
     assert issubclass(GoodArray, CheckableHasArrayNamespace)
 
 
-def test_has_namespace_instance():
+def test_has_namespace_instance() -> None:
     """Test that an instance of GoodArray is recognized as HasArrayNamespace."""
     x = GoodArray()
     assert isinstance(x, CheckableHasArrayNamespace)
 
 
-def test_not_has_namespace_class():
+def test_not_has_namespace_class() -> None:
     """Test that BadArray is not a subclass of HasArrayNamespace."""
     assert not issubclass(BadArray, CheckableHasArrayNamespace)
 
 
-def test_not_has_namespace_instance():
+def test_not_has_namespace_instance() -> None:
     """Test that an instance of BadArray is not recognized as HasArrayNamespace."""
     y = BadArray()
     assert not isinstance(y, CheckableHasArrayNamespace)