added headers support to MultipartFile abstraction

org.springframework.test/src/main/java/org/springframework/mock/web/MockMultipartFile.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2011 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.
@@ -20,6 +20,8 @@ import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Collections;
+import java.util.Iterator;
 
 import org.springframework.util.Assert;
 import org.springframework.util.FileCopyUtils;
@@ -39,6 +41,8 @@ import org.springframework.web.multipart.MultipartFile;
  */
 public class MockMultipartFile implements MultipartFile {
 
+	private static final String CONTENT_TYPE = "Content-Type";
+
 	private final String name;
 
 	private String originalFilename;
@@ -129,4 +133,26 @@ public class MockMultipartFile implements MultipartFile {
 		FileCopyUtils.copy(this.content, dest);
 	}
 
+	public String getHeader(String name) {
+		if (CONTENT_TYPE.equalsIgnoreCase(name)) {
+			return this.contentType;
+		}
+		else {
+			return null;
+		}
+	}
+
+	public String[] getHeaders(String name) {
+		if (CONTENT_TYPE.equalsIgnoreCase(name)) {
+			return new String[] {this.contentType};
+		}
+		else {
+			return null;
+		}
+	}
+
+	public Iterator<String> getHeaderNames(String name) {
+		return Collections.singleton(CONTENT_TYPE).iterator();
+	}
+
 }