``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, 42 insertions, 0 deletions

diff --git a/tests/pyreverse/data/classes_No_Name.puml b/tests/pyreverse/data/classes_No_Name.puml
new file mode 100644
index 000000000..c833d7fef
--- /dev/null
+++ b/tests/pyreverse/data/classes_No_Name.puml
@@ -0,0 +1,42 @@
+@startuml classes_No_Name
+set namespaceSeparator none
+class "Ancestor" as data.clientmodule_test.Ancestor {
+attr : str
+cls_member
+
+get_value()
+set_value(value)
+}
+class "<color:red>CustomException</color>" as data.suppliermodule_test.CustomException {
+
+}
+class "DoNothing" as data.suppliermodule_test.DoNothing {
+
+}
+class "DoNothing2" as data.suppliermodule_test.DoNothing2 {
+
+}
+class "DoSomething" as data.suppliermodule_test.DoSomething {
+my_int : Optional[int]
+my_string : str
+
+do_it(new_int: int) -> int
+}
+class "Interface" as data.suppliermodule_test.Interface {
+
+
+get_value()
+set_value(value)
+}
+class "Specialization" as data.clientmodule_test.Specialization {
+TYPE : str
+relation
+relation2
+top : str
+}
+data.clientmodule_test.Specialization --|> data.clientmodule_test.Ancestor
+data.clientmodule_test.Ancestor ..|> data.suppliermodule_test.Interface
+data.suppliermodule_test.DoNothing --* data.clientmodule_test.Ancestor : cls_member
+data.suppliermodule_test.DoNothing --* data.clientmodule_test.Specialization : relation
+data.suppliermodule_test.DoNothing2 --* data.clientmodule_test.Specialization : relation2
+@enduml