Introduce test for XML replaced-method element without explicit arg-type

This commit introduces an integration test for the regression fixed in
the previous commit (cd64e6676c).

Closes gh-31826

spring-context/src/test/java/org/springframework/beans/factory/xml/XmlBeanFactoryTests.java

@@ -22,8 +22,13 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.StringWriter;
 import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.stream.Collectors;
 
 import org.apache.commons.logging.LogFactory;
 import org.junit.jupiter.api.Test;
@@ -56,6 +61,8 @@ import org.springframework.beans.testfixture.beans.ITestBean;
 import org.springframework.beans.testfixture.beans.IndexedTestBean;
 import org.springframework.beans.testfixture.beans.TestBean;
 import org.springframework.beans.testfixture.beans.factory.DummyFactory;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.core.io.FileSystemResource;
 import org.springframework.core.io.UrlResource;
@@ -1336,6 +1343,15 @@ class XmlBeanFactoryTests {
 		assertThat(dos.lastArg).isEqualTo(s2);
 	}
 
+	@Test  // gh-31826
+	void replaceNonOverloadedInterfaceMethodWithoutSpecifyingExplicitArgTypes() {
+		try (ConfigurableApplicationContext context =
+				new ClassPathXmlApplicationContext(DELEGATION_OVERRIDES_CONTEXT.getPath())) {
+			EchoService echoService = context.getBean(EchoService.class);
+			assertThat(echoService.echo("foo", "bar")).containsExactly("bar", "foo");
+		}
+	}
+
 	@Test
 	void lookupOverrideOneMethodWithConstructorInjection() {
 		DefaultListableBeanFactory xbf = new DefaultListableBeanFactory();
@@ -1891,3 +1907,20 @@ class XmlBeanFactoryTests {
 	}
 
 }
+
+interface EchoService {
+
+	String[] echo(Object... objects);
+}
+
+class ReverseArrayMethodReplacer implements MethodReplacer {
+
+	@Override
+	public Object reimplement(Object obj, Method method, Object[] args) {
+		List<String> list = Arrays.stream((Object[]) args[0])
+				.map(Object::toString)
+				.collect(Collectors.toCollection(ArrayList::new));
+		Collections.reverse(list);
+		return list.toArray(String[]::new);
+	}
+}

spring-context/src/test/resources/org/springframework/beans/factory/xml/XmlBeanFactoryTests-delegationOverrides.xml

@@ -36,12 +36,21 @@
 
 	<bean id="replaceVoidMethod" parent="someParent"
 			class="org.springframework.beans.factory.xml.OverrideOneMethodSubclass">
+	</bean>
 
+	<bean id="replaceEchoMethod" class="org.springframework.beans.factory.xml.EchoService">
+		<!--
+			This method is not overloaded, so we don't need to specify any arg types
+		-->
+		<replaced-method name="echo" replacer="reverseArrayReplacer" />
 	</bean>
 
 	<bean id="reverseReplacer"
 		class="org.springframework.beans.factory.xml.ReverseMethodReplacer"/>
 
+	<bean id="reverseArrayReplacer"
+		class="org.springframework.beans.factory.xml.ReverseArrayMethodReplacer"/>
+
 	<bean id="fixedReplacer"
 		class="org.springframework.beans.factory.xml.FixedMethodReplacer"/>