Add test for StandardReflectionParameterNameDiscoverer

Added test to StandardReflectionParameterNameDiscoverer that
demonstrates discovering of parameter names on an interface.

Issue: SPR-9643

build.gradle

@@ -23,15 +23,6 @@ configure(allprojects) { project ->
 	apply plugin: "test-source-set-dependencies"
 	apply from: "${gradleScriptDir}/ide.gradle"
 
-	compileJava {
-		sourceCompatibility=1.6
-		targetCompatibility=1.6
-	}
-	compileTestJava {
-		sourceCompatibility=1.8
-		targetCompatibility=1.8
-	}
-
 	[compileJava, compileTestJava]*.options*.compilerArgs = [
 		"-Xlint:serial",
 		"-Xlint:varargs",
@@ -53,6 +44,17 @@ configure(allprojects) { project ->
 		"-Xlint:-unchecked"    // TODO enable and fix warnings
 	]
 
+	compileJava {
+		sourceCompatibility=1.6
+		targetCompatibility=1.6
+	}
+
+	compileTestJava {
+		sourceCompatibility=1.8
+		targetCompatibility=1.8
+		compileTestJava.options.compilerArgs += "-parameters"
+	}
+
 	sourceSets.test.resources.srcDirs = ["src/test/resources", "src/test/java"]
 
 	test {

spring-core/src/test/java/org/springframework/core/StandardReflectionParameterNameDiscoverTests.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2002-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.util.ReflectionUtils;
+
+import java.lang.reflect.Method;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+
+/**
+ * Tests for StandardReflectionParameterNameDiscoverer
+ *
+ * @author Rob Winch
+ */
+public class StandardReflectionParameterNameDiscoverTests {
+    private ParameterNameDiscoverer parameterNameDiscoverer;
+
+    @Before
+    public void setup() {
+        parameterNameDiscoverer = new StandardReflectionParameterNameDiscoverer();
+    }
+
+    @Test
+    public void getParameterNamesOnInterface() {
+        Method method = ReflectionUtils.findMethod(MessageService.class,"sendMessage", String.class);
+        String[] actualParams = parameterNameDiscoverer.getParameterNames(method);
+        assertThat(actualParams, is(new String[]{"message"}));
+    }
+
+    public interface MessageService {
+        void sendMessage(String message);
+    }
+}