From edb733f8352a132ea0621d1e7fb6fd881f779eca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Fournier?= <clement.fournier@tu-dresden.de>
Date: Thu, 23 May 2024 21:10:58 +0200
Subject: [PATCH] Add test for UnnecessaryCast

---
 .../rule/codestyle/xml/UnnecessaryCast.xml    | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/codestyle/xml/UnnecessaryCast.xml b/pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/codestyle/xml/UnnecessaryCast.xml
index ebac87a9f5..53072694c5 100644
--- a/pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/codestyle/xml/UnnecessaryCast.xml
+++ b/pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/codestyle/xml/UnnecessaryCast.xml
@@ -866,4 +866,26 @@ class MyClass {
             }
             ]]></code>
     </test-code>
+    <test-code>
+        <description>Unboxing in lambda</description>
+        <expected-problems>1</expected-problems>
+        <expected-linenumbers>4</expected-linenumbers>
+        <code><![CDATA[
+            public abstract class Example {
+                VoidSpecies<Integer> mismatch = payload -> (int) payload; // nowarn: here the cast does a null check
+                RefSpecies<Integer, Object> i = t -> (int) t; // nowarn: here the cast does a null check
+                IntSpecies<Integer> i = t -> (int) t; // warn: in this context t->t is equivalent because it will be unboxed
+
+                interface VoidSpecies<T> {
+                    void doSomething(T t);
+                }
+                interface RefSpecies<T, X> {
+                    X foo(T t);
+                }
+                interface IntSpecies<T> {
+                    int foo(T t);
+                }
+            }
+            ]]></code>
+    </test-code>
 </test-data>