``pyreverse``: add PlantUML output (#4846)

* Extract helper method to get annotated arguments into ``Printer`` base class.

* Add ``Printer`` subclass for PlantUML output

* Add functional test for ``PlantUmlPrinter``

* Add tests for specific layout for ``PlantUmlPrinter``

* Extract test helper function to remove code duplication

* Add new test class to check type annotations

* Cleanup generated .puml files after tests finished

* Create a factory function to get the correct ``Printer`` class for a given filetype.

* Fix unittest after adding a new class to the test data.

* Add changelog and whatsnew entry

* Add "plantuml" as possible extension for PlantUML output

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/data/suppliermodule_test.py b/tests/data/suppliermodule_test.py
index 6af30fa08..add637d4a 100644
--- a/tests/data/suppliermodule_test.py
+++ b/tests/data/suppliermodule_test.py
@@ -7,6 +7,16 @@ class Interface:
     def set_value(self, value):
         raise NotImplementedError
 
+class CustomException(Exception): pass
+
 class DoNothing: pass
 
 class DoNothing2: pass
+
+class DoSomething:
+    def __init__(self, a_string: str, optional_int: int = None):
+        self.my_string = a_string
+        self.my_int = optional_int
+
+    def do_it(self, new_int: int) -> int:
+        return self.my_int + new_int