# Copyright (c) 1999, 2000 D. Richard Hipp
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
# 
# You should have received a copy of the GNU General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA  02111-1307, USA.
#
# Author contact information:
#   drh@hwaci.com
#   http://www.hwaci.com/drh/
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is page cache subsystem.
#
# $Id: pager.test,v 1.1 2001/04/15 00:37:21 drh Exp $


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

if {$dbprefix!="mem:" && [info commands pager_open]!=""} {

# Basic sanity check.  Open and close a pager.
#
do_test pager-1.0 {
  catch {file delete -force ptf1.db}
  catch {file delete -force ptf1.db-journal}
  set v [catch {
    set ::p1 [pager_open ptf1.db 10]
  } msg]
} {0}
do_test pager-1.1 {
  pager_stats $::p1
} {ref 0 page 0 max 10 size -1 state 0 err 0 hit 0 miss 0 ovfl 0}
do_test pager-1.2 {
  pager_pagecount $::p1
} {0}
do_test pager-1.3 {
  pager_stats $::p1
} {ref 0 page 0 max 10 size -1 state 0 err 0 hit 0 miss 0 ovfl 0}
do_test pager-1.4 {
  pager_close $::p1
} {}

# Try to write a few pages.
#
do_test pager-2.1 {
  set v [catch {
    set ::p1 [pager_open ptf1.db 10]
  } msg]
} {0}
do_test pager-2.2 {
  set v [catch {
    set ::g1 [page_get $::p1 0]
  } msg]
  lappend v $msg
} {1 SQLITE_ERROR}
do_test pager-2.3 {
  set v [catch {
    set ::g1 [page_get $::p1 1]
  } msg]
  if {$v} {lappend v $msg}
  set v
} {0}
do_test pager-2.4 {
  pager_stats $::p1
} {ref 1 page 1 max 10 size -1 state 1 err 0 hit 0 miss 1 ovfl 0}
do_test pager-2.5 {
  pager_pagecount $::p1
} {0}
do_test pager-2.6 {
  pager_stats $::p1
} {ref 1 page 1 max 10 size 0 state 1 err 0 hit 0 miss 1 ovfl 0}
do_test pager-2.7 {
  page_number $::g1
} {1}
do_test pager-2.8 {
  page_read $::g1
} {}
do_test pager-2.9 {
  page_unref $::g1
} {}
do_test pager-2.10 {
  pager_stats $::p1
} {ref 0 page 0 max 10 size -1 state 0 err 0 hit 0 miss 1 ovfl 0}
do_test pager-2.11 {
  set ::g1 [page_get $::p1 1]
  expr {$::g1!=0}
} {1}
do_test pager-2.12 {
  page_number $::g1
} {1}
do_test pager-2.13 {
  pager_stats $::p1
} {ref 1 page 1 max 10 size -1 state 1 err 0 hit 0 miss 2 ovfl 0}
do_test pager-2.14 {
  set v [catch {
    page_write $::g1 "Page-One"
  } msg]
  lappend v $msg
} {0 {}}
do_test pager-2.15 {
  pager_stats $::p1
} {ref 1 page 1 max 10 size 0 state 2 err 0 hit 0 miss 2 ovfl 0}
do_test pager-2.16 {
  page_read $::g1
} {Page-One}
do_test pager-2.17 {
  set v [catch {
    pager_commit $::p1
  } msg]
  lappend v $msg
} {0 {}}
do_test pager-2.20 {
  pager_stats $::p1
} {ref 1 page 1 max 10 size -1 state 1 err 0 hit 0 miss 2 ovfl 0}
do_test pager-2.19 {
  pager_pagecount $::p1
} {1}
do_test pager-2.21 {
  pager_stats $::p1
} {ref 1 page 1 max 10 size 1 state 1 err 0 hit 0 miss 2 ovfl 0}
do_test pager-2.22 {
  page_unref $::g1
} {}
do_test pager-2.23 {
  pager_stats $::p1
} {ref 0 page 0 max 10 size -1 state 0 err 0 hit 0 miss 2 ovfl 0}
do_test pager-2.24 {
  set v [catch {
    page_get $::p1 1
  } ::g1]
  if {$v} {lappend v $::g1}
  set v
} {0}
do_test pager-2.25 {
  page_read $::g1
} {Page-One}
do_test pager-2.26 {
  set v [catch {
    page_write $::g1 {page-one}
  } msg]
  lappend v $msg
} {0 {}}
do_test pager-2.27 {
  page_read $::g1
} {page-one}
do_test pager-2.28 {
  set v [catch {
    pager_rollback $::p1
  } msg]
  lappend v $msg
} {0 {}}
do_test pager-2.29 {
  page_read $::g1
} {Page-One}

do_test pager-2.99 {
  pager_close $::p1
} {}


} ;# end if( not mem: and has pager_open command );

finish_test
