DATACMNS-266 - Use new common Maven build infrastructure.

Simplified project setup to be a single module build again. Using Spring Data Build parent POM to simplify project setup. See https://github.com/SpringSource/spring-data-build#spring-data-build-infrastructure

src/test/java/org/springframework/data/authentication/UserCredentialsUnitTests.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2011 by the original author(s).
+ *
+ * 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.authentication;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+/**
+ * Unit tests for {@link UserCredentials}.
+ * 
+ * @author Oliver Gierke
+ */
+public class UserCredentialsUnitTests {
+
+	@Test
+	public void treatsEmptyStringAsNull() {
+
+		UserCredentials credentials = new UserCredentials("", "");
+		assertThat(credentials.getUsername(), is(nullValue()));
+		assertThat(credentials.hasUsername(), is(false));
+		assertThat(credentials.getPassword(), is(nullValue()));
+		assertThat(credentials.hasPassword(), is(false));
+	}
+
+	/**
+	 * @see DATACMNS-142
+	 */
+	@Test
+	public void noCredentialsNullsUsernameAndPassword() {
+
+		assertThat(UserCredentials.NO_CREDENTIALS.getUsername(), is(nullValue()));
+		assertThat(UserCredentials.NO_CREDENTIALS.getPassword(), is(nullValue()));
+	}
+
+	/**
+	 * @see DATACMNS-142
+	 */
+	@Test
+	public void configuresUsernameCorrectly() {
+
+		UserCredentials credentials = new UserCredentials("username", null);
+
+		assertThat(credentials.hasUsername(), is(true));
+		assertThat(credentials.getUsername(), is("username"));
+		assertThat(credentials.hasPassword(), is(false));
+		assertThat(credentials.getPassword(), is(nullValue()));
+	}
+
+	/**
+	 * @see DATACMNS-142
+	 */
+	@Test
+	public void configuresPasswordCorrectly() {
+
+		UserCredentials credentials = new UserCredentials(null, "password");
+
+		assertThat(credentials.hasUsername(), is(false));
+		assertThat(credentials.getUsername(), is(nullValue()));
+		assertThat(credentials.hasPassword(), is(true));
+		assertThat(credentials.getPassword(), is("password"));
+	}
+}