tests/cpydiff/core_import_split_ns_pkgs: Document split import.

tests/cpydiff/core_import_split_ns_pkgs.py

@@ -2,14 +2,21 @@
 categories: Core,import
 description: MicroPython doesn't support namespace packages split across filesystem.
 cause: MicroPython's import system is highly optimized for simplicity, minimal memory usage, and minimal filesystem search overhead.
-workaround: Don't install modules belonging to the same namespace package in different directories. For MicroPython, it's recommended to have at most 3-component module search paths: for your current application, per-user (writable), system-wide (non-writable).
+workaround: Not required.
 """
 import sys
 
 sys.path.append(sys.path[1] + "/modules")
 sys.path.append(sys.path[1] + "/modules2")
 
-import subpkg.foo
+# import from the second subpackage first
 import subpkg.bar
+import subpkg.foo
+
+print("Two modules of a split non-namespace package imported")
+
+import subpkg
+assert subpkg.one == 1
+assert not hasattr(subpkg,"two")
 
-print("Two modules of a split namespace package imported")
+print("The first module's __init__ is used")

tests/cpydiff/modules/subpkg/__init__.py

@@ -0,0 +1,2 @@
+# Not a namespace package
+one = 1

tests/cpydiff/modules2/subpkg/__init__.py

@@ -0,0 +1,2 @@
+# Not a namespace package
+two = 2