source: downloads/tcl8.5.2/tests/uplevel.test @ 68

# Commands covered:  uplevel
#
# 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) 1991-1993 The Regents of the University of California.
# Copyright (c) 1994 Sun Microsystems, Inc.
# Copyright (c) 1998-1999 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: @(#) $Id: uplevel.test,v 1.8 2004/05/19 10:47:28 dkf Exp $

if {[lsearch [namespace children] ::tcltest] == -1} {
    package require tcltest
    namespace import -force ::tcltest::*
}

proc a {x y} {
    newset z [expr $x+$y]
    return $z
}
proc newset {name value} {
    uplevel set $name $value
    uplevel 1 {uplevel 1 {set xyz 22}}
}

test uplevel-1.1 {simple operation} {
    set xyz 0
    a 22 33
} 55
test uplevel-1.2 {command is another uplevel command} {
    set xyz 0
    a 22 33
    set xyz
} 22

proc a1 {} {
    b1
    global a a1
    set a $x
    set a1 $y
}
proc b1 {} {
    c1
    global b b1
    set b $x
    set b1 $y
}
proc c1 {} {
    uplevel 1 set x 111
    uplevel #2 set y 222
    uplevel 2 set x 333
    uplevel #1 set y 444
    uplevel 3 set x 555
    uplevel #0 set y 666
}
a1
test uplevel-2.1 {relative and absolute uplevel} {set a} 333
test uplevel-2.2 {relative and absolute uplevel} {set a1} 444
test uplevel-2.3 {relative and absolute uplevel} {set b} 111
test uplevel-2.4 {relative and absolute uplevel} {set b1} 222
test uplevel-2.5 {relative and absolute uplevel} {set x} 555
test uplevel-2.6 {relative and absolute uplevel} {set y} 666

test uplevel-3.1 {uplevel to same level} {
    set x 33
    uplevel #0 set x 44
    set x
} 44
test uplevel-3.2 {uplevel to same level} {
    set x 33
    uplevel 0 set x
} 33
test uplevel-3.3 {uplevel to same level} {
    set y xxx
    proc a1 {} {set y 55; uplevel 0 set y 66; return $y}
    a1
} 66
test uplevel-3.4 {uplevel to same level} {
    set y zzz
    proc a1 {} {set y 55; uplevel #1 set y}
    a1
} 55

test uplevel-4.1 {error: non-existent level} {
    list [catch c1 msg] $msg
} {1 {bad level "#2"}}
test uplevel-4.2 {error: non-existent level} {
    proc c2 {} {uplevel 3 {set a b}}
    list [catch c2 msg] $msg
} {1 {bad level "3"}}
test uplevel-4.3 {error: not enough args} {
    list [catch uplevel msg] $msg
} {1 {wrong # args: should be "uplevel ?level? command ?arg ...?"}}
test uplevel-4.4 {error: not enough args} {
    proc upBug {} {uplevel 1}
    list [catch upBug msg] $msg
} {1 {wrong # args: should be "uplevel ?level? command ?arg ...?"}}

proc a2 {} {
    uplevel a3
}
proc a3 {} {
    global x y
    set x [info level]
    set y [info level 1]
}
a2
test uplevel-5.1 {info level} {set x} 1
test uplevel-5.2 {info level} {set y} a3

namespace eval ns1 {
    proc set args {return ::ns1}
}
proc a2 {} {
    uplevel {set x ::}
}
test uplevel-6.1 {uplevel and shadowed cmds} {
    set res [namespace eval ns1 a2]
    lappend res [namespace eval ns2 a2]
    lappend res [namespace eval ns1 a2]
    namespace eval ns1 {rename set {}}
    lappend res [namespace eval ns1 a2]
} {::ns1 :: ::ns1 ::}


# cleanup
::tcltest::cleanupTests
return