Count match cases for too-many-branches

Author: cdce8p

doc/whatsnew/fragments/10542.false_negative

@@ -0,0 +1,3 @@
+Count match cases for ``too-many-branches`` check.
+
+Refs #10542

pylint/checkers/design_analysis.py

@@ -693,6 +693,10 @@ def visit_while(self, node: nodes.While) -> None:
 
     visit_for = visit_while
 
+    def visit_match(self, node: nodes.Match) -> None:
+        """Increments the branches counter."""
+        self._inc_branch(node, len(node.cases))
+
     def _inc_branch(self, node: nodes.NodeNG, branchesnum: int = 1) -> None:
         """Increments the branches counter."""
         self._branches[node.scope()] += branchesnum

tests/functional/t/too/too_many_branches.py

@@ -10,10 +10,6 @@ def wrong(): # [too-many-branches]
         pass
     elif 1:
         pass
-    elif 1:
-        pass
-    elif 1:
-        pass
     try:
         pass
     except TypeError:
@@ -24,6 +20,11 @@ def wrong(): # [too-many-branches]
         pass
     while True:
         pass
+    match 1:
+        case 1:
+            pass
+        case 2:
+            pass
     if 1:
         pass
     elif 2: