sqlite/test/wal2snapshot.test

# 2018 December 5
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the operation of the library in
# "PRAGMA journal_mode=WAL2" mode.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

set testprefix wal2snapshot
ifcapable !wal {finish_test ; return }
ifcapable !snapshot {finish_test; return}

foreach {tn mode} {1 wal 2 wal2} {
  reset_db
  do_execsql_test $tn.1 "PRAGMA journal_mode = $mode" $mode

  do_execsql_test $tn.2 {
    CREATE TABLE t1(a, b);
    INSERT INTO t1 VALUES(1, 2);
    INSERT INTO t1 VALUES(3, 4);
    BEGIN;
  }

  # Check that sqlite3_snapshot_get() is an error for a wal2 db.
  #
  if {$tn==1} {
    do_test 1.3 {
      set S [sqlite3_snapshot_get db main]
      sqlite3_snapshot_free $S
    } {}
  } else {
    do_test 2.3 {
      list [catch { sqlite3_snapshot_get db main } msg] $msg
    } {1 SQLITE_ERROR}
  }
  
  # Check that sqlite3_snapshot_recover() is an error for a wal2 db.
  #
  do_execsql_test $tn.4 COMMIT
  if {$tn==1} {
    do_test 1.5 {
      sqlite3_snapshot_recover db main
    } {}
  } else {
    do_test 2.5 {
      list [catch { sqlite3_snapshot_recover db main } msg] $msg
    } {1 SQLITE_ERROR}
  }
 
  # Check that sqlite3_snapshot_open() is an error for a wal2 db.
  #
  if {$tn==1} {
    do_test 1.6 {
      execsql BEGIN
      set SNAPSHOT [sqlite3_snapshot_get_blob db main]
      sqlite3_snapshot_open_blob db main $SNAPSHOT
      execsql COMMIT
    } {}
  } else {
    do_test 2.6.1 {
      execsql BEGIN
      set res [
        list [catch { sqlite3_snapshot_open_blob db main $SNAPSHOT } msg] $msg
      ]
      execsql COMMIT
      set res
    } {1 SQLITE_ERROR}
    do_test 2.6.2 {
      execsql BEGIN
      execsql {SELECT * FROM sqlite_master}
      set res [
        list [catch { sqlite3_snapshot_open_blob db main $SNAPSHOT } msg] $msg
      ]
      execsql COMMIT
      set res
    } {1 SQLITE_ERROR}
  }
}


finish_test