DATAKV-123 - Introduced dedicated KeyValueRepositoryFactoryBean.createRepositoryFactory(…).

We now expose a dedicated method for implementors to use to create the repository factory instance based on the configuration of the factory.

Added unit tests to make sure the factory bean fails fast if it's configured improperly.

Original Pull Request: #17

src/test/java/org/springframework/data/keyvalue/repository/support/KeyValueRepositoryFactoryBeanUnitTests.java

@@ -0,0 +1,130 @@
+/*
+ * Copyright 2016 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.keyvalue.repository.support;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+import java.io.Serializable;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.springframework.data.keyvalue.core.KeyValueOperations;
+import org.springframework.data.repository.Repository;
+import org.springframework.data.repository.query.parser.AbstractQueryCreator;
+
+/**
+ * Unit tests for {@link KeyValueRepositoryFactoryBean}.
+ * 
+ * @author Oliver Gierke
+ */
+public class KeyValueRepositoryFactoryBeanUnitTests {
+
+	public @Rule ExpectedException exception = ExpectedException.none();
+
+	KeyValueRepositoryFactoryBean<?, ?, ?> factoryBean;
+
+	@Before
+	public void setUp() {
+		this.factoryBean = new KeyValueRepositoryFactoryBean<Repository<Object, Serializable>, Object, Serializable>();
+	}
+
+	/**
+	 * @see DATAKV-123
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void rejectsNullKeyValueOperations() {
+		factoryBean.setKeyValueOperations(null);
+	}
+
+	/**
+	 * @see DATAKV-123
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void rejectsNullQueryCreator() {
+		factoryBean.setQueryCreator(null);
+	}
+
+	/**
+	 * @see DATAKV-123
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void rejectsUninitializedInstance() {
+		factoryBean.afterPropertiesSet();
+	}
+
+	/**
+	 * @see DATAKV-123
+	 */
+	@SuppressWarnings("unchecked")
+	@Test(expected = IllegalArgumentException.class)
+	public void rejectsInstanceWithoutKeyValueOperations() {
+
+		Class<? extends AbstractQueryCreator<?, ?>> creatorType = (Class<? extends AbstractQueryCreator<?, ?>>) mock(
+				AbstractQueryCreator.class).getClass();
+
+		factoryBean.setQueryCreator(creatorType);
+		factoryBean.afterPropertiesSet();
+	}
+
+	/**
+	 * @see DATAKV-123
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void rejectsInstanceWithoutQueryCreator() {
+
+		factoryBean.setKeyValueOperations(mock(KeyValueOperations.class));
+		factoryBean.afterPropertiesSet();
+	}
+
+	/**
+	 * @see DATAKV-123
+	 */
+	@Test
+	@SuppressWarnings("unchecked")
+	public void initializesConfiguredFactory() {
+
+		Class<? extends AbstractQueryCreator<?, ?>> creatorType = (Class<? extends AbstractQueryCreator<?, ?>>) mock(
+				AbstractQueryCreator.class).getClass();
+
+		factoryBean.setQueryCreator(creatorType);
+		factoryBean.setKeyValueOperations(mock(KeyValueOperations.class));
+
+		exception.expect(IllegalArgumentException.class);
+		exception.expectMessage("Repository interface");
+
+		factoryBean.afterPropertiesSet();
+	}
+
+	/**
+	 * @see DATAKV-123
+	 */
+	@Test
+	@SuppressWarnings("unchecked")
+	public void createsRepositoryFactory() {
+
+		Class<? extends AbstractQueryCreator<?, ?>> creatorType = (Class<? extends AbstractQueryCreator<?, ?>>) mock(
+				AbstractQueryCreator.class).getClass();
+
+		factoryBean.setQueryCreator(creatorType);
+		factoryBean.setKeyValueOperations(mock(KeyValueOperations.class));
+
+		assertThat(factoryBean.createRepositoryFactory(), is(notNullValue()));
+	}
+}