# 2002 May 24
#
# 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 SQLite routines used for converting between the
# various suported unicode encodings (UTF-8, UTF-16, UTF-16le and
# UTF-16be).
#
# $Id: enc2.test,v 1.6 2004/06/09 12:30:06 danielk1977 Exp $

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

db close

# Return the UTF-8 representation of the supplied UTF-16 string $str. 
proc utf8 {str} {
  # If $str ends in two 0x00 0x00 bytes, knock these off before
  # converting to UTF-8 using TCL.
  binary scan $str \c* vals
  if {[lindex $vals end]==0 && [lindex $vals end-1]==0} {
    set str [binary format \c* [lrange $vals 0 end-2]]
  }

  set r [encoding convertfrom unicode $str]
  return $r
}

#
# This proc contains all the tests in this file. It is run
# three times. Each time the file 'test.db' contains a database
# with the following contents:
set dbcontents {
  CREATE TABLE t1(a PRIMARY KEY, b, c);
  INSERT INTO t1 VALUES('one', 'I', 1);
}
# This proc tests that we can open and manipulate the test.db 
# database, and that it is possible to retreive values in
# various text encodings.
#
proc run_test_script {t enc} {

# Open the database and pull out a (the) row.
do_test $t.1 {
  set DB [sqlite db test.db]
  execsql {SELECT * FROM t1}
} {one I 1}

# Insert some data
do_test $t.2 {
  execsql {INSERT INTO t1 VALUES('two', 'II', 2);}
  execsql {SELECT * FROM t1}
} {one I 1 two II 2}

# Insert some data 
do_test $t.3 {
  execsql {
    INSERT INTO t1 VALUES('three','III',3);
    INSERT INTO t1 VALUES('four','IV',4);
    INSERT INTO t1 VALUES('five','V',5);
  }
  execsql {SELECT * FROM t1}
} {one I 1 two II 2 three III 3 four IV 4 five V 5}

# Use the index
do_test $t.4 {
  execsql {
    SELECT * FROM t1 WHERE a = 'one';
  }
} {one I 1}
do_test $t.5 {
  execsql {
    SELECT * FROM t1 WHERE a = 'four';
  }
} {four IV 4}
do_test $t.6 {
  execsql {
    SELECT * FROM t1 WHERE a IN ('one', 'two');
  }
} {one I 1 two II 2}

# Now check that we can retrieve data in both UTF-16 and UTF-8
do_test $t.7 {
  set STMT [sqlite3_prepare $DB "SELECT a FROM t1 WHERE c>3;" -1 TAIL]
  sqlite3_step $STMT
  sqlite3_column_text $STMT 0
} {four}

do_test $t.8 {
  sqlite3_step $STMT
  utf8 [sqlite3_column_text16 $STMT 0]
} {five}

do_test $t.9 {
  sqlite3_finalize $STMT
} SQLITE_OK

do_test $t.10 {
  db eval {PRAGMA encoding}
} $enc

}

# The three unicode encodings understood by SQLite.
set encodings [list UTF-8 UTF-16le UTF-16be]

set i 1
foreach enc $encodings {
  file delete -force test.db
  sqlite db test.db
  db eval "PRAGMA encoding = \"$enc\""
  execsql $dbcontents
  db close
  run_test_script enc2-$i $enc
  incr i
}

# Test that it is an error to try to attach a database with a different
# encoding to the main database.
do_test enc2-4.1 {
  file delete -force test.db
  sqlite db test.db
  db eval "PRAGMA encoding = 'UTF-8'"
  db eval "CREATE TABLE abc(a, b, c);"
} {}
do_test enc2-4.2 {
  file delete -force test2.db
  sqlite db2 test2.db
  db2 eval "PRAGMA encoding = 'UTF-16'"
  db2 eval "CREATE TABLE abc(a, b, c);"
} {}
do_test enc2-4.3 {
  catchsql {
    ATTACH 'test2.db' as aux;
  }
} {1 {attached databases must use the same text encoding as main database}}

finish_test