# 2007 April 27

#

# 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 the tests in this file are to verify that the

# underlying TEXT or BLOB representation of an sqlite3_value

# changes appropriately when APIs from the following set are

# called:

#

#     sqlite3_value_text()

#     sqlite3_value_text16()

#     sqlite3_value_blob()

#     sqlite3_value_bytes()

#     sqlite3_value_bytes16()

#

# $Id: ptrchng.test,v 1.5 2008/07/12 14:52:20 drh Exp $

set testdir [file dirname $argv0]

source $testdir/tester.tcl

ifcapable !bloblit {

  finish_test

  return

}

# Register the "pointer_change" SQL function.

#

sqlite3_create_function db

do_test ptrchng-1.1 {

  execsql {

    CREATE TABLE t1(x INTEGER PRIMARY KEY, y BLOB);

    INSERT INTO t1 VALUES(1, 'abc');

    INSERT INTO t1 VALUES(2, 

       'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234356789');

    INSERT INTO t1 VALUES(3, x'626c6f62');

    INSERT INTO t1 VALUES(4,

 x'000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f2021222324'

    );

    SELECT count(*) FROM t1;

  }

} {4}

# For the short entries that fit in the Mem.zBuf[], the pointer should

# never change regardless of what type conversions occur.

#

# UPDATE: No longer true, as Mem.zBuf[] has been removed.

#

do_test ptrchng-2.1 {

  execsql {

    SELECT pointer_change(y, 'text', 'noop', 'blob') FROM t1 WHERE x=1

  }

} {0}

do_test ptrchng-2.2 {

  execsql {

    SELECT pointer_change(y, 'blob', 'noop', 'text') FROM t1 WHERE x=1

  }

} {0}

ifcapable utf16 {

  do_test ptrchng-2.3 {

    execsql {

      SELECT pointer_change(y, 'text', 'noop', 'text16') FROM t1 WHERE x=1

    }

  } {1}

  do_test ptrchng-2.4 {

    execsql {

      SELECT pointer_change(y, 'blob', 'noop', 'text16') FROM t1 WHERE x=1

    }

  } {1}

  do_test ptrchng-2.5 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'blob') FROM t1 WHERE x=1

    }

  } {0}

  do_test ptrchng-2.6 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'text') FROM t1 WHERE x=1

    }

  } {1}

}

do_test ptrchng-2.11 {

  execsql {

    SELECT pointer_change(y, 'text', 'noop', 'blob') FROM t1 WHERE x=3

  }

} {0}

do_test ptrchng-2.12 {

  execsql {

    SELECT pointer_change(y, 'blob', 'noop', 'text') FROM t1 WHERE x=3

  }

} {0}

ifcapable utf16 {

  do_test ptrchng-2.13 {

    execsql {

      SELECT pointer_change(y, 'text', 'noop', 'text16') FROM t1 WHERE x=3

    }

  } {1}

  do_test ptrchng-2.14 {

    execsql {

      SELECT pointer_change(y, 'blob', 'noop', 'text16') FROM t1 WHERE x=3

    }

  } {1}

  do_test ptrchng-2.15 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'blob') FROM t1 WHERE x=3

    }

  } {0}

  do_test ptrchng-2.16 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'text') FROM t1 WHERE x=3

    }

  } {1}

}

# For the long entries that do not fit in the Mem.zBuf[], the pointer

# should change sometimes.

#

do_test ptrchng-3.1 {

  execsql {

    SELECT pointer_change(y, 'text', 'noop', 'blob') FROM t1 WHERE x=2

  }

} {0}

do_test ptrchng-3.2 {

  execsql {

    SELECT pointer_change(y, 'blob', 'noop', 'text') FROM t1 WHERE x=2

  }

} {0}

ifcapable utf16 {

  do_test ptrchng-3.3 {

    execsql {

      SELECT pointer_change(y, 'text', 'noop', 'text16') FROM t1 WHERE x=2

    }

  } {1}

  do_test ptrchng-3.4 {

    execsql {

      SELECT pointer_change(y, 'blob', 'noop', 'text16') FROM t1 WHERE x=2

    }

  } {1}

  do_test ptrchng-3.5 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'blob') FROM t1 WHERE x=2

    }

  } {0}

  do_test ptrchng-3.6 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'text') FROM t1 WHERE x=2

    }

  } {1}

}

do_test ptrchng-3.11 {

  execsql {

    SELECT pointer_change(y, 'text', 'noop', 'blob') FROM t1 WHERE x=4

  }

} {0}

do_test ptrchng-3.12 {

  execsql {

    SELECT pointer_change(y, 'blob', 'noop', 'text') FROM t1 WHERE x=4

  }

} {0}

ifcapable utf16 {

  do_test ptrchng-3.13 {

    execsql {

      SELECT pointer_change(y, 'text', 'noop', 'text16') FROM t1 WHERE x=4

    }

  } {1}

  do_test ptrchng-3.14 {

    execsql {

      SELECT pointer_change(y, 'blob', 'noop', 'text16') FROM t1 WHERE x=4

    }

  } {1}

  do_test ptrchng-3.15 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'blob') FROM t1 WHERE x=4

    }

  } {0}

  do_test ptrchng-3.16 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'text') FROM t1 WHERE x=4

    }

  } {1}

}

# A call to _bytes() should never reformat a _text() or _blob().

#

do_test ptrchng-4.1 {

  execsql {

    SELECT pointer_change(y, 'text', 'bytes', 'text') FROM t1

  }

} {0 0 0 0}

do_test ptrchng-4.2 {

  execsql {

    SELECT pointer_change(y, 'blob', 'bytes', 'blob') FROM t1

  }

} {0 0 0 0}

# A call to _blob() should never trigger a reformat

#

do_test ptrchng-5.1 {

  execsql {

    SELECT pointer_change(y, 'text', 'bytes', 'blob') FROM t1

  }

} {0 0 0 0}

ifcapable utf16 {

  do_test ptrchng-5.2 {

    execsql {

      SELECT pointer_change(y, 'text16', 'noop', 'blob') FROM t1

    }

  } {0 0 0 0}

  do_test ptrchng-5.3 {

    execsql {

      SELECT pointer_change(y, 'text16', 'bytes16', 'blob') FROM t1

    }

  } {0 0 0 0}

}

finish_test