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# The file tests the tcl_platform variable
#
# This file contains a collection of tests for one or more of the Tcl
# built-in commands. Sourcing this file into Tcl runs the tests and
# generates output for errors. No output means no errors were found.
#
# Copyright (c) 1999 by Scriptics Corporation
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#)
if {[lsearch [namespace children] ::tcltest] == -1} {
package require tcltest
namespace import -force ::tcltest::*
}
test platform-1.1 {TclpSetVariables: tcl_platform} {
interp create i
i eval {catch {unset tcl_platform(debug)}}
i eval {catch {unset tcl_platform(threaded)}}
set result [i eval {lsort [array names tcl_platform]}]
interp delete i
set result
} {byteOrder machine os osVersion platform user wordSize}
# Test assumes twos-complement arithmetic, which is true of virtually
# everything these days. Note that this does *not* use wide(), and
# this is intentional since that could make Tcl's numbers wider than
# the machine-integer on some platforms...
test platform-2.1 {tcl_platform(wordSize) indicates size of native word} {
set result [expr {1 << (8 * $tcl_platform(wordSize) - 1)}]
# Result must be the largest bit in a machine word, which this checks
# without assuming how wide the word really is
list [expr {$result < 0}] [expr {$result ^ ($result - 1)}]
} {1 -1}
# cleanup
::tcltest::cleanupTests
return
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