#
# 2002 December 03
#
# 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 script is btree database backend
#
# This file focuses on testing the sqliteBtreeNext() and
# sqliteBtreePrevious() procedures and making sure they are able
# to step through an entire table from either direction.
#
# $Id: btree4.test,v 1.1 2002/12/04 13:40:27 drh Exp $


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

if {[info commands btree_open]!=""} {

# Open a test database.
#
file delete -force test1.bt
file delete -force test1.bt-journal
set b1 [btree_open test1.bt]
btree_begin_transaction $::b1

set data {abcdefghijklmnopqrstuvwxyz0123456789}
append data $data
append data $data
append data $data
append data $data

foreach N {10 100 1000} {
  btree_clear_table $::b1 2
  set ::c1 [btree_cursor $::b1 2 1]
  do_test btree4-$N.1 {
    for {set i 1} {$i<=$N} {incr i} {
      btree_insert $::c1 [format k-%05d $i] $::data-$i
    }
    btree_first $::c1
    btree_key $::c1
  } {k-00001}
  do_test btree4-$N.2 {
    btree_data $::c1
  } $::data-1
  for {set i 2} {$i<=$N} {incr i} {
    do_test btree-$N.3.$i.1 {
      btree_next $::c1
    } 0
    do_test btree-$N.3.$i.2 {
      btree_key $::c1
    } [format k-%05d $i]
    do_test btree-$N.3.$i.3 {
      btree_data $::c1
    } $::data-$i
  }
  do_test btree4-$N.4 {
    btree_next $::c1
  } 1
  do_test btree4-$N.5 {
    btree_last $::c1
  } 0
  do_test btree4-$N.6 {
    btree_key $::c1
  } [format k-%05d $N]
  do_test btree4-$N.7 {
    btree_data $::c1
  } $::data-$N
  for {set i [expr {$N-1}]} {$i>=1} {incr i -1} {
    do_test btree4-$N.8.$i.1 {
      btree_prev $::c1
    } 0
    do_test btree4-$N.8.$i.2 {
      btree_key $::c1
    } [format k-%05d $i]
    do_test btree4-$N.8.$i.3 {
      btree_data $::c1
    } $::data-$i
  }
  do_test btree4-$N.9 {
    btree_prev $::c1
  } 1
  btree_close_cursor $::c1
}

btree_rollback $::b1
btree_pager_ref_dump $::b1
btree_close $::b1

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

finish_test