Starting to test more smart scan functionality using mocked Thing Dependencies

tests/mock_things/mock_autofocus.py

@@ -0,0 +1,17 @@
+"""This testing submodule contains mock autofocus things.
+
+These mocks are designed to be inserted as dependencies to give specific
+functionality and returns.
+
+The mocks do not subclass, and instead return very specific defined answers
+to functions
+"""
+
+
+class MockAutoFocusThing:
+    # Counter for checking functions were called
+    mock_call_count = {"looping_autofocus": 0}
+
+    def looping_autofocus(self, dz=2000, start="centre"):  # noqa: ARG002
+        """This function mocks autofocus with no return"""
+        self.mock_call_count["looping_autofocus"] += 1