DATACMNS-456 - Added unit test for attribute to XML attribute name conversion.

src/main/java/org/springframework/data/repository/config/XmlRepositoryConfigurationSource.java

@@ -15,8 +15,10 @@
  */
 package org.springframework.data.repository.config;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Locale;
 import java.util.regex.Pattern;
 
 import org.springframework.beans.factory.xml.ParserContext;
@@ -173,8 +175,13 @@ public class XmlRepositoryConfigurationSource extends RepositoryConfigurationSou
 	@Override
 	public String getAttribute(String name) {
 
-		List<String> parts = Arrays.asList(CAMEL_CASE_PARTS.split(name));
-		String xmlAttributeName = StringUtils.collectionToDelimitedString(parts, "-");
+		List<String> lowercase = new ArrayList<String>();
+
+		for (String part : Arrays.asList(CAMEL_CASE_PARTS.split(name))) {
+			lowercase.add(part.toLowerCase(Locale.US));
+		}
+
+		String xmlAttributeName = StringUtils.collectionToDelimitedString(lowercase, "-");
 		String attribute = element.getAttribute(xmlAttributeName);
 
 		return StringUtils.hasText(attribute) ? attribute : null;

src/test/java/org/springframework/data/repository/config/XmlRepositoryConfigurationSourceUnitTests.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2014 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.data.repository.config;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+import static org.mockito.Matchers.*;
+import static org.mockito.Mockito.*;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.springframework.test.util.ReflectionTestUtils;
+import org.w3c.dom.Element;
+
+/**
+ * Unit tests for {@link XmlRepositoryConfigurationSource}.
+ * 
+ * @author Oliver Gierke
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class XmlRepositoryConfigurationSourceUnitTests {
+
+	@Mock Element element;
+
+	/**
+	 * @see DATACMNS-456
+	 */
+	@Test
+	public void translatesCamelCaseAttributeNameIntoXmlEquivalent() {
+
+		RepositoryConfigurationSource source = mock(XmlRepositoryConfigurationSource.class);
+		ReflectionTestUtils.setField(source, "element", element);
+		when(source.getAttribute(anyString())).thenCallRealMethod();
+
+		when(element.getAttribute("some-xml-attribute")).thenReturn("value");
+
+		assertThat(source.getAttribute("someXmlAttribute"), is("value"));
+	}
+}