Updated TAP test

test/tap/tests/pgsql-unsupported_feature_test-t.cpp

@@ -125,28 +125,56 @@ void check_copy_stdin_via_extended_query(PGconn* conn) {
     PQclear(res);
 }
 
+void check_listen_via_simple_and_extended_query(PGconn* conn) {
+
+    PGresult* res = PQexec(conn, "LISTEN mychannel");
+    ExecStatusType status = PQresultStatus(res);
+    /* Check that it failed */
+    ok(status == PGRES_FATAL_ERROR, "PQexec fails for LISTEN");
+    const char* sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
+    ok(sqlstate && strcmp(sqlstate, "0A000") == 0,
+        "SQLSTATE is 0A000 (feature_not_supported)");
+    PQclear(res);
+    res = PQprepare(conn,
+        "listen_stmt",
+        "LISTEN mychannel",
+        0,
+        NULL);
+    status = PQresultStatus(res);
+    /* Check that it failed */
+    ok(status == PGRES_FATAL_ERROR, "PQprepare fails for LISTEN");
+    sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
+    ok(sqlstate && strcmp(sqlstate, "0A000") == 0,
+        "SQLSTATE is 0A000 (feature_not_supported)");
+	PQclear(res);
+}
+
 void execute_tests(bool with_ssl) {
     PGconn* conn = create_new_connection(with_ssl);
 
     if (conn == nullptr)
         return;
 
-    // Test 1: Prepared Statement in binary mode
-    //check_prepared_statement_binary(conn);
-
-    // Test 2: COPY in binary mode
-    //check_copy_binary(conn);
+    /* Now, supported features 
+     * Test 1: Prepared Statement in binary mode
+     * check_prepared_statement_binary(conn);
+     *
+     *  Test 2: COPY in binary mode
+     * check_copy_binary(conn); 
+     */
 
 	// Test 3: COPY FROM STDIN via extended query
 	check_copy_stdin_via_extended_query(conn);
 
+	// Test 4: LISTEN via simple and extended query
+	check_listen_via_simple_and_extended_query(conn);
+
     // Close the connection
     PQfinish(conn);
 }
 
 int main(int argc, char** argv) {
-
-    plan(3); // Total number of tests planned
+    plan(7); // Total number of tests planned
 
     if (cl.getEnv())
         return exit_status();