#
# $Id: delete.t,v 1.3 2003/12/02 12:12:16 foxr Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA 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.
#
# LON-CAPA 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 LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#


#  Test new functionality of ConfigFileEditor::delete
#

use strict;
use Test;
use ConfigFileEdit;


#
#   Tests  we plan are:
#   Delete a line from the middle of the test file
#     with a pile of consistency test.
#   Delete a line from the end of the test file 
#     with a pile of consistency tests.
#  NOTE: deleting from the beginning is the same as
#    from the middle.
#

BEGIN {plan tests => 8}

#
#   Test deletion of middle element.
#   - Use the test file test2config.cfg
#   - Delete the line with key line2
#   - Total number of lines should go down by 1.
#   - line1 - index should not change.
#   - last  - index should go down by 1.
sub  TestDeleteMiddle {

    my $editor    =    ConfigFileEdit->new("test2config.cfg", 0);

    my $linecount =    $editor->LineCount(); 
    my $hashref   =    $editor->{KeyToLines};
    my $initiallast =  $hashref->{"last"};

    $editor->DeleteLine("line2");
    ok($editor->LineCount(), $linecount-1);

    $hashref = $editor->{KeyToLines};
    ok($hashref->{"line1"}, 0);

    ok($hashref->{"last"}, $initiallast-1);

    my $deleted = $editor->Find("line2");
    if(!defined($deleted)) {
	ok(1);
    } else {
	ok(0);
    }

}

#
#   Test deletion of last element:
#   - Use the test file test2config.cfg
#   - Delete the line with key "last" (last line).
#   - # lines should go down by 1.
#   - line1 index should not change.
#   - line2 index should not change.
sub TestDeleteEnd {
    my $editor    = ConfigFileEdit->new("test2config.cfg", 0);
    my $linecount = $editor->LineCount();
    my $hashref   = $editor->{KeyToLines};
    my $line1idx  = $hashref->{"line1"};
    my $line2idx  = $hashref->{"line2"};

    $editor->DeleteLine("last");

    ok($editor->LineCount(), $linecount-1);
    $hashref   = $editor->{KeyToLines}; # Hash may change due to reindex!!
    ok($hashref->{"line1"}, $line1idx);
    ok($hashref->{"line2"}, $line2idx);

    my $deleted = $editor->Find("last");
    if(!defined($deleted)) {
	ok(1);
    } else {
	ok(0);
    }

}

TestDeleteMiddle;
TestDeleteEnd;