# util.tcl --
#
# Utilities used during testing TGraph:
#
# Copyright (c) 2000-2003, JYL Software Inc.
# 
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# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
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# Ensure that the tgraph extension is loaded:

package require tgraph

# Delete a storage and cause an error:

proc deleteAndError {storage msg} {
    $storage delete
    return -code error $msg
}

# Print an indication of activity:

proc showActive {} {
    puts -nonewline stderr "."
    flush stderr
}

# Ensure that the named storage is empty and open for use:

proc ensureFreshStorage {name} {
    [tgraph::open $name] delete
    return [tgraph::open $name]
}
