Added tests for the 'toMessage()' method of MethodParameterMessageMapper.

org.springframework.integration/src/test/java/org/springframework/integration/message/MethodParameterMessageMapperFromMessageTests.java

@@ -36,7 +36,7 @@ import org.springframework.integration.message.StringMessage;
 /**
  * @author Mark Fisher
  */
-public class MethodParameterMessageMapperTests {
+public class MethodParameterMessageMapperFromMessageTests {
 
 	@Test
 	public void fromMessageWithOptionalHeader() throws Exception {

org.springframework.integration/src/test/java/org/springframework/integration/message/MethodParameterMessageMapperToMessageTests.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2002-2008 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.integration.message;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import java.lang.reflect.Method;
+
+import org.junit.Test;
+
+import org.springframework.integration.annotation.Header;
+
+/**
+ * @author Mark Fisher
+ */
+public class MethodParameterMessageMapperToMessageTests {
+
+	@Test
+	public void toMessageWithPayload() throws Exception {
+		Method method = TestService.class.getMethod("sendPayload", String.class);
+		MethodParameterMessageMapper mapper = new MethodParameterMessageMapper(method);
+		Message<?> message = mapper.toMessage(new Object[] { "test" });
+		assertEquals("test", message.getPayload());
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void toMessageWithTooManyParameters() throws Exception {
+		Method method = TestService.class.getMethod("sendPayload", String.class);
+		MethodParameterMessageMapper mapper = new MethodParameterMessageMapper(method);
+		mapper.toMessage(new Object[] { "test" , "oops" });
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void toMessageWithEmptyParameterArray() throws Exception {
+		Method method = TestService.class.getMethod("sendPayload", String.class);
+		MethodParameterMessageMapper mapper = new MethodParameterMessageMapper(method);
+		mapper.toMessage(new Object[] {});
+	}
+
+	@Test
+	public void toMessageWithPayloadAndHeader() throws Exception {
+		Method method = TestService.class.getMethod(
+				"sendPayloadAndHeader", String.class, String.class);
+		MethodParameterMessageMapper mapper = new MethodParameterMessageMapper(method);
+		Message<?> message = mapper.toMessage(new Object[] { "test", "bar" });
+		assertEquals("test", message.getPayload());
+		assertEquals("bar", message.getHeaders().get("foo"));
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void toMessageWithPayloadAndRequiredHeaderButNullValue() throws Exception {
+		Method method = TestService.class.getMethod(
+				"sendPayloadAndHeader", String.class, String.class);
+		MethodParameterMessageMapper mapper = new MethodParameterMessageMapper(method);
+		mapper.toMessage(new Object[] { "test", null });
+	}
+
+	@Test
+	public void toMessageWithPayloadAndOptionalHeaderWithValueProvided() throws Exception {
+		Method method = TestService.class.getMethod(
+				"sendPayloadAndOptionalHeader", String.class, String.class);
+		MethodParameterMessageMapper mapper = new MethodParameterMessageMapper(method);
+		Message<?> message = mapper.toMessage(new Object[] { "test", "bar" });
+		assertEquals("test", message.getPayload());
+		assertEquals("bar", message.getHeaders().get("foo"));
+	}
+
+	@Test
+	public void toMessageWithPayloadAndOptionalHeaderWithNullValue() throws Exception {
+		Method method = TestService.class.getMethod(
+				"sendPayloadAndOptionalHeader", String.class, String.class);
+		MethodParameterMessageMapper mapper = new MethodParameterMessageMapper(method);
+		Message<?> message = mapper.toMessage(new Object[] { "test", null });
+		assertEquals("test", message.getPayload());
+		assertNull(message.getHeaders().get("foo"));
+	}
+
+
+	private static interface TestService {
+
+		void sendPayload(String payload);
+
+		void sendPayloadAndHeader(String payload, @Header("foo") String foo);
+
+		void sendPayloadAndOptionalHeader(String payload, @Header(value="foo", required=false) String foo);
+
+	}
+
+}