[PECO-2052] Return null in driver if jdbc url is not accepted (#562)

* return null if jdbc url is not accepted

* modify integ test

Author: samikshya-db

src/main/java/com/databricks/client/jdbc/Driver.java

@@ -43,6 +43,10 @@ public boolean acceptsURL(String url) {
 
   @Override
   public Connection connect(String url, Properties info) throws DatabricksSQLException {
+    if (!acceptsURL(url)) {
+      // Return null connection if URL is not accepted - as per JDBC standard.
+      return null;
+    }
     IDatabricksConnectionContext connectionContext =
         DatabricksConnectionContextFactory.create(url, info);
 

src/test/java/com/databricks/jdbc/integration/fakeservice/tests/ErrorHandlingIntegrationTests.java

@@ -3,7 +3,6 @@
 import static com.databricks.jdbc.integration.IntegrationTestUtil.*;
 import static org.junit.jupiter.api.Assertions.*;
 
-import com.databricks.jdbc.exception.DatabricksParsingException;
 import com.databricks.jdbc.exception.DatabricksSQLException;
 import com.databricks.jdbc.exception.DatabricksSQLFeatureNotSupportedException;
 import com.databricks.jdbc.integration.fakeservice.AbstractFakeServiceIntegrationTests;
@@ -39,10 +38,8 @@ void testFailureToLoadDriver() {
   @Test
   void testInvalidURL() {
     Exception exception =
-        assertThrows(
-            DatabricksParsingException.class,
-            () -> getConnection("jdbc:abcde://invalidhost:0000/db"));
-    assertTrue(exception.getMessage().contains("Invalid url"));
+        assertThrows(SQLException.class, () -> getConnection("jdbc:abcde://invalidhost:0000/db"));
+    assertTrue(exception.getMessage().contains("No suitable driver found for"));
   }
 
   @Test