# 2008 June 18
#
# 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.  
#
# This file is devoted to testing the sqlite3_next_stmt interface.
#
# $Id: capi3d.test,v 1.2 2008/07/14 15:11:20 drh Exp $
#

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

# Create N prepared statements against database connection db
# and return a list of all the generated prepared statements.
#
proc make_prepared_statements {N} {
  set plist {}
  for {set i 0} {$i<$N} {incr i} {
    set sql "SELECT $i FROM sqlite_master WHERE name LIKE '%$i%'"
    if {rand()<0.33} {    
      set s [sqlite3_prepare_v2 db $sql -1 notused]
    } else {
      ifcapable utf16 {
        if {rand()<0.5} {
          set sql [encoding convertto unicode $sql]\x00\x00
          set s [sqlite3_prepare16 db $sql -1 notused]
        } else {
          set s [sqlite3_prepare db $sql -1 notused]
        }
      }
      ifcapable !utf16 {
        set s [sqlite3_prepare db $sql -1 notused]
      }
    }
    lappend plist $s
  }
  return $plist
}


# Scramble the $inlist into a random order.
#
proc scramble {inlist} {
  set y {}
  foreach x $inlist {
    lappend y [list [expr {rand()}] $x]
  }
  set y [lsort $y]
  set outlist {}
  foreach x $y {
    lappend outlist [lindex $x 1]
  }
  return $outlist
}

# Database initially has no prepared statements.
#
do_test capi3d-1.1 {
  db cache flush
  sqlite3_next_stmt db 0
} {}

# Run the following tests for between 1 and 100 prepared statements.
#
for {set i 1} {$i<=100} {incr i} {
  set stmtlist [make_prepared_statements $i]
  do_test capi3d-1.2.$i.1 {
    set p [sqlite3_next_stmt db 0]
    set x {}
    while {$p!=""} {
      lappend x $p
      set p [sqlite3_next_stmt db $p]
    }
    lsort $x
  } [lsort $stmtlist]
  do_test capi3-1.2.$i.2 {
    foreach p [scramble $::stmtlist] {
      sqlite3_finalize $p
    }
    sqlite3_next_stmt db 0
  } {}
}
      

finish_test
