Annotation Config was added. Now AppConfig contains a Main Method (same logic in App.java) to execute

repository/src/test/java/com/iluwatar/repository/AnnotationBasedRepositoryTest.java

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+package com.iluwatar.repository;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Arrays;
+import java.util.List;
+
+import javax.annotation.Resource;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import com.google.common.collect.Lists;
+
+/**
+ * Test case to test the functions of {@link PersonRepository}, beside the CRUD functions, the query
+ * by {@link org.springframework.data.jpa.domain.Specification} are also test.
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { AppConfig.class}, loader = AnnotationConfigContextLoader.class)
+public class AnnotationBasedRepositoryTest {
+
+  @Resource
+  private PersonRepository repository;
+
+  Person peter = new Person("Peter", "Sagan", 17);
+  Person nasta = new Person("Nasta", "Kuzminova", 25);
+  Person john = new Person("John", "lawrence", 35);
+  Person terry = new Person("Terry", "Law", 36);
+
+  List<Person> persons = Arrays.asList(peter, nasta, john, terry);
+
+  /**
+   * Prepare data for test
+   */
+  @Before
+  public void setup() {
+
+    repository.save(persons);
+  }
+
+  @Test
+  public void testFindAll() {
+
+    List<Person> actuals = Lists.newArrayList(repository.findAll());
+    assertTrue(actuals.containsAll(persons) && persons.containsAll(actuals));
+  }
+
+  @Test
+  public void testSave() {
+
+    Person terry = repository.findByName("Terry");
+    terry.setSurname("Lee");
+    terry.setAge(47);
+    repository.save(terry);
+
+    terry = repository.findByName("Terry");
+    assertEquals(terry.getSurname(), "Lee");
+    assertEquals(47, terry.getAge());
+  }
+
+  @Test
+  public void testDelete() {
+
+    Person terry = repository.findByName("Terry");
+    repository.delete(terry);
+
+    assertEquals(3, repository.count());
+    assertNull(repository.findByName("Terry"));
+  }
+
+  @Test
+  public void testCount() {
+
+    assertEquals(4, repository.count());
+  }
+
+  @Test
+  public void testFindAllByAgeBetweenSpec() {
+
+    List<Person> persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40));
+
+    assertEquals(3, persons.size());
+    assertTrue(persons.stream().allMatch((item) -> {
+      return item.getAge() > 20 && item.getAge() < 40;
+    }));
+  }
+
+  @Test
+  public void testFindOneByNameEqualSpec() {
+
+    Person actual = repository.findOne(new PersonSpecifications.NameEqualSpec("Terry"));
+    assertEquals(terry, actual);
+  }
+
+  @After
+  public void cleanup() {
+
+    repository.deleteAll();
+  }
+
+}
+

repository/src/test/java/com/iluwatar/repository/AppConfigTest.java

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+package com.iluwatar.repository;
+
+import static org.junit.Assert.*;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import javax.sql.DataSource;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.transaction.annotation.Transactional;
+
+/**
+ * This case is Just for test the Annotation Based configuration
+ * 
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { AppConfig.class}, loader = AnnotationConfigContextLoader.class)
+public class AppConfigTest {
+
+	@Autowired
+	DataSource dataSource;
+	
+	/**
+	 * Test for bean instance
+	 */
+	@Test
+	public void testDataSource() {
+		assertNotNull(dataSource);
+	}
+	
+	/**
+	 * Test for correct query execution 
+	 * @throws SQLException 
+	 */
+	@Test
+	@Transactional
+	public void testQuery() throws SQLException{
+		ResultSet resultSet =  dataSource.getConnection().createStatement().executeQuery("SELECT 1");
+		String result = null;
+		String expected = "1";
+		while (resultSet.next()) {
+			result = resultSet.getString(1);
+			
+		}
+		assertTrue(result.equals(expected));
+	}
+
+}