Added small Unit Tests

sharding-core/src/test/java/org/apache/shardingsphere/core/rule/DataNodeTest.java

@@ -21,8 +21,7 @@ import org.apache.shardingsphere.core.exception.ShardingConfigurationException;
 import org.junit.Test;
 
 import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.*;
 
 public final class DataNodeTest {
     
@@ -50,7 +49,11 @@ public final class DataNodeTest {
     
     @Test
     public void assertEquals() {
-        assertTrue(new DataNode("ds_0.tbl_0").equals(new DataNode("ds_0.tbl_0")));
+        DataNode dataNode = new DataNode("ds_0.tbl_0");
+        assertTrue(dataNode.equals(new DataNode("ds_0.tbl_0")));
+        assertTrue(dataNode.equals(dataNode));
+        assertFalse(dataNode.equals(new DataNode("ds_0.tbl_1")));
+        assertFalse(dataNode.equals(null));
     }
     
     @Test

sharding-transaction/sharding-transaction-2pc/sharding-transaction-xa/sharding-transaction-xa-core/src/test/java/org/apache/shardingsphere/transaction/xa/jta/connection/XAConnectionFactoryTest.java

@@ -23,6 +23,7 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
+import org.postgresql.xa.PGXAConnection;
 
 import javax.sql.XADataSource;
 import java.sql.Connection;
@@ -49,4 +50,14 @@ public final class XAConnectionFactoryTest {
     public void assertCreateH2XAConnection() {
         assertThat(XAConnectionFactory.createXAConnection(DatabaseType.H2, xaDataSource, connection), instanceOf(JdbcXAConnection.class));
     }
+
+    @Test
+    public void assertCreatePostgreSQLXAConnection() {
+        assertThat(XAConnectionFactory.createXAConnection(DatabaseType.PostgreSQL, xaDataSource, connection), instanceOf(PGXAConnection.class));
+    }
+
+    @Test(expected = UnsupportedOperationException.class)
+    public void assertCreateUnknownXAConnectionThrowsUnsupportedOperationException() {
+        XAConnectionFactory.createXAConnection(DatabaseType.Oracle, xaDataSource, connection);
+    }
 }