Test status quo for null-safe Void method references in SpEL

Author: sbrannen

spring-expression/src/test/java/org/springframework/expression/spel/SpelCompilationCoverageTests.java

@@ -3898,6 +3898,40 @@ void methodReferenceVarargs() {
 		tc.reset();
 	}
 
+	@Test
+	void nullSafeInvocationOfNonStaticVoidWrapperMethod() {
+		// non-static method, no args, Void return
+		expression = parser.parseExpression("new %s()?.oneVoidWrapper()".formatted(TestClass5.class.getName()));
+
+		assertCantCompile(expression);
+
+		TestClass5._i = 0;
+		expression.getValue();
+		assertThat(TestClass5._i).isEqualTo(1);
+
+		TestClass5._i = 0;
+		assertCanCompile(expression);
+		expression.getValue();
+		assertThat(TestClass5._i).isEqualTo(1);
+	}
+
+	@Test
+	void nullSafeInvocationOfStaticVoidWrapperMethod() {
+		// static method, no args, Void return
+		expression = parser.parseExpression("T(%s)?.twoVoidWrapper()".formatted(TestClass5.class.getName()));
+
+		assertCantCompile(expression);
+
+		TestClass5._i = 0;
+		expression.getValue();
+		assertThat(TestClass5._i).isEqualTo(1);
+
+		TestClass5._i = 0;
+		assertCanCompile(expression);
+		expression.getValue();
+		assertThat(TestClass5._i).isEqualTo(1);
+	}
+
 	@Test
 	void methodReference() {
 		TestClass5 tc = new TestClass5();
@@ -5712,8 +5746,19 @@ public void reset() {
 
 		public void one() { i = 1; }
 
+		public Void oneVoidWrapper() {
+			_i = 1;
+			this.i = 1;
+			return null;
+		}
+
 		public static void two() { _i = 1; }
 
+		public static Void twoVoidWrapper() {
+			_i = 1;
+			return null;
+		}
+
 		public String three() { return "hello"; }
 		public long four() { return 3277700L; }