Fix Pyreverse: Aggregations aren't filtered according to filter mode (PUB_ONLY, etc.) (pylint-dev#10379)

* updated diagrams.py file

* added tests

* updated tests

* added test cases

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: pavan-msys

doc/whatsnew/fragments/10373.bugfix

@@ -0,0 +1,3 @@
+Fix a bug in Pyreverse where aggregations and associations were included in diagrams regardless of the selected --filter-mode (such as PUB_ONLY, ALL, etc.).
+
+Closes #10373

pylint/pyreverse/diagrams.py

@@ -237,6 +237,9 @@ def extract_relationships(self) -> None:
             # associations & aggregations links
             for name, values in list(node.aggregations_type.items()):
                 for value in values:
+                    if not self.show_attr(name):
+                        continue
+
                     self.assign_association_relationship(
                         value, obj, name, "aggregation"
                     )
@@ -249,6 +252,9 @@ def extract_relationships(self) -> None:
 
             for name, values in associations.items():
                 for value in values:
+                    if not self.show_attr(name):
+                        continue
+
                     self.assign_association_relationship(
                         value, obj, name, "association"
                     )

tests/pyreverse/functional/class_diagrams/aggregation_filtering/all.mmd

@@ -0,0 +1,25 @@
+classDiagram
+  class P {
+    name : str
+    __init__(name: str)
+  }
+  class PrivateAttr {
+    __x
+    __init__()
+  }
+  class ProtectedAttr {
+    _x
+    __init__()
+  }
+  class PublicAttr {
+    x
+    __init__()
+  }
+  class SpecialAttr {
+    __x__
+    __init__()
+  }
+  P --* PrivateAttr : __x
+  P --* ProtectedAttr : _x
+  P --* PublicAttr : x
+  P --* SpecialAttr : __x__

tests/pyreverse/functional/class_diagrams/aggregation_filtering/all.py

@@ -0,0 +1,23 @@
+class P:
+    def __init__(self, name: str):
+        self.name = name
+
+
+class PrivateAttr:
+    def __init__(self):
+        self.__x = P("private")
+
+
+class ProtectedAttr:
+    def __init__(self):
+        self._x = P("protected")
+
+
+class PublicAttr:
+    def __init__(self):
+        self.x = P("public")
+
+
+class SpecialAttr:
+    def __init__(self):
+        self.__x__ = P("special")

tests/pyreverse/functional/class_diagrams/aggregation_filtering/all.rc

@@ -0,0 +1,2 @@
+[testoptions]
+command_line_args=--filter-mode=ALL

tests/pyreverse/functional/class_diagrams/aggregation_filtering/other.mmd

@@ -0,0 +1,21 @@
+classDiagram
+  class P {
+    name : str
+    __init__(name: str)
+  }
+  class PrivateAttr {
+    __init__()
+  }
+  class ProtectedAttr {
+    __init__()
+  }
+  class PublicAttr {
+    x
+    __init__()
+  }
+  class SpecialAttr {
+    __x__
+    __init__()
+  }
+  P --* PublicAttr : x
+  P --* SpecialAttr : __x__

tests/pyreverse/functional/class_diagrams/aggregation_filtering/other.py

@@ -0,0 +1,23 @@
+class P:
+    def __init__(self, name: str):
+        self.name = name
+
+
+class PrivateAttr:
+    def __init__(self):
+        self.__x = P("private")
+
+
+class ProtectedAttr:
+    def __init__(self):
+        self._x = P("protected")
+
+
+class PublicAttr:
+    def __init__(self):
+        self.x = P("public")
+
+
+class SpecialAttr:
+    def __init__(self):
+        self.__x__ = P("special")

tests/pyreverse/functional/class_diagrams/aggregation_filtering/other.rc

@@ -0,0 +1,2 @@
+[testoptions]
+command_line_args=--filter-mode=OTHER

tests/pyreverse/functional/class_diagrams/aggregation_filtering/pub_only.mmd

@@ -0,0 +1,14 @@
+classDiagram
+  class P {
+    name : str
+  }
+  class PrivateAttr {
+  }
+  class ProtectedAttr {
+  }
+  class PublicAttr {
+    x
+  }
+  class SpecialAttr {
+  }
+  P --* PublicAttr : x

tests/pyreverse/functional/class_diagrams/aggregation_filtering/pub_only.py

@@ -0,0 +1,23 @@
+class P:
+    def __init__(self, name: str):
+        self.name = name
+
+
+class PrivateAttr:
+    def __init__(self):
+        self.__x = P("private")
+
+
+class ProtectedAttr:
+    def __init__(self):
+        self._x = P("protected")
+
+
+class PublicAttr:
+    def __init__(self):
+        self.x = P("public")
+
+
+class SpecialAttr:
+    def __init__(self):
+        self.__x__ = P("special")