DATACMNS-458 - Added PersistentEntities value object.

Introduced simple value object to hide a set of MappingContexts and be able to access PersistentEntities from them.

src/test/java/org/springframework/data/mapping/context/PersistentEntitiesUnitTests.java

@@ -0,0 +1,89 @@
+/*
+ * 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.mapping.context;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+import java.util.Arrays;
+import java.util.Collections;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.springframework.data.util.ClassTypeInformation;
+
+/**
+ * Unit tests for {@link PersistentEntities}.
+ * 
+ * @author Oliver Gierke
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class PersistentEntitiesUnitTests {
+
+	@Mock SampleMappingContext first;
+	@Mock SampleMappingContext second;
+
+	/**
+	 * @see DATACMNS-458
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void rejectsNullMappingContexts() {
+		new PersistentEntities(null);
+	}
+
+	/**
+	 * @see DATACMNS-458
+	 */
+	@Test
+	public void returnsPersistentEntitiesFromMappingContexts() {
+
+		when(first.hasPersistentEntityFor(Sample.class)).thenReturn(false);
+		when(second.hasPersistentEntityFor(Sample.class)).thenReturn(true);
+
+		new PersistentEntities(Arrays.asList(first, second)).getPersistentEntity(Sample.class);
+
+		verify(first, times(1)).hasPersistentEntityFor(Sample.class);
+		verify(first, times(0)).getPersistentEntity(Sample.class);
+
+		verify(second, times(1)).hasPersistentEntityFor(Sample.class);
+		verify(second, times(1)).getPersistentEntity(Sample.class);
+	}
+
+	/**
+	 * @see DATACMNS-458
+	 */
+	@Test
+	public void indicatesManagedType() {
+
+		SampleMappingContext context = new SampleMappingContext();
+		context.setInitialEntitySet(Collections.singleton(Sample.class));
+		context.initialize();
+
+		PersistentEntities entities = new PersistentEntities(Arrays.asList(context));
+
+		assertThat(entities.getPersistentEntity(Sample.class), is(notNullValue()));
+		assertThat(entities.getPersistentEntity(Object.class), is(nullValue()));
+		assertThat(entities.getManagedTypes(), hasItem(ClassTypeInformation.from(Sample.class)));
+		assertThat(entities, hasItem(entities.getPersistentEntity(Sample.class)));
+	}
+
+	static class Sample {
+
+	}
+}