Add tests for keepAlive

Author: alex268

jdbc/src/test/java/tech/ydb/jdbc/YdbDriverTablesTest.java

@@ -59,6 +59,8 @@ public void defaultModeTest() throws SQLException {
 
             connection.createStatement().execute(CREATE_TABLE);
 
+            Assertions.assertTrue(connection.isValid(10));
+
             LocalDate ld = LocalDate.of(2017, 12, 3);
             String prefix = "text-value-";
             int idx = 0;
@@ -141,6 +143,8 @@ public void customQueriesTest() throws SQLException {
 
             conn.createStatement().execute(CREATE_TABLE);
 
+            Assertions.assertTrue(conn.isValid(10));
+
             LocalDate ld = LocalDate.of(2017, 12, 3);
             String prefix = "text-value-";
             int idx = 0;
@@ -219,6 +223,8 @@ public void forceScanAndBulkTest() throws SQLException {
 
             conn.createStatement().execute(CREATE_TABLE);
 
+            Assertions.assertTrue(conn.isValid(10));
+
             LocalDate ld = LocalDate.of(2017, 12, 3);
             String prefix = "text-value-";
             int idx = 0;
@@ -330,6 +336,8 @@ public void streamResultsTest() throws SQLException {
 
             conn.createStatement().execute(CREATE_TABLE);
 
+            Assertions.assertTrue(conn.isValid(10));
+
             LocalDate ld = LocalDate.of(2017, 12, 3);
             String prefix = "text-value-";
             int idx = 0;
@@ -454,6 +462,8 @@ public void tableServiceModeTest() throws SQLException {
 
             connection.createStatement().execute(CREATE_TABLE);
 
+            Assertions.assertTrue(connection.isValid(10));
+
             LocalDate ld = LocalDate.of(2017, 12, 3);
             String prefix = "text-value-";
             int idx = 0;