test: fix ITJdbcConnectTest for custom server url (#1098)

* test: fix ITJdbcConnectTest for custom server url

Author: rajatbhatta

src/test/java/com/google/cloud/spanner/jdbc/it/ITJdbcConnectTest.java

@@ -60,17 +60,24 @@ public class ITJdbcConnectTest extends ITAbstractJdbcTest {
   @ClassRule public static JdbcIntegrationTestEnv env = new JdbcIntegrationTestEnv();
 
   private Database database;
+  private SpannerOptions options;
 
   @Before
   public void setup() {
     database = env.getOrCreateDatabase(Dialect.GOOGLE_STANDARD_SQL, Collections.emptyList());
+    options = env.getTestHelper().getOptions();
   }
 
   private String createBaseUrl() {
     StringBuilder url = new StringBuilder("jdbc:cloudspanner:");
     if (EmulatorSpannerHelper.isUsingEmulator()) {
       url.append("//").append(System.getenv("SPANNER_EMULATOR_HOST"));
     }
+    // Extract "//x.y.googleapis.com" from "https://x.y.googleapis.com" and append it to
+    // url.
+    if (options.getHost() != null) {
+      url.append(options.getHost().substring(options.getHost().indexOf(':') + 1));
+    }
     url.append("/").append(database.getId().getName());
     if (EmulatorSpannerHelper.isUsingEmulator()) {
       url.append(";usePlainText=true");