Language/OS - Multiplatform Resource Library/LANGUAGE OS.iso/tcl/tcl70b2.lha/tcl7.0b2/tests/upvar.test

Text File | 1993-07-17 | 8KB | 304 lines

# Commands covered:  upvar
#
# 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.
# All rights reserved.
#
# Permission is hereby granted, without written agreement and without
# license or royalty fees, to use, copy, modify, and distribute this
# software and its documentation for any purpose, provided that the
# above copyright notice and the following two paragraphs appear in
# all copies of this software.
#
# IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
# DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
# OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
# CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
# ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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#
# $Header: /user6/ouster/tcl/tests/RCS/upvar.test,v 1.4 93/07/17 14:38:10 ouster Exp $ (Berkeley)

if {[string compare test [info procs test]] == 1} then {source defs}

test upvar-1.1 {reading variables with upvar} {
    proc p1 {a b} {set c 22; set d 33; p2}
    proc p2 {} {upvar a x1 b x2 c x3 d x4; set a abc; list $x1 $x2 $x3 $x4 $a}
    p1 foo bar
} {foo bar 22 33 abc}
test upvar-1.2 {reading variables with upvar} {
    proc p1 {a b} {set c 22; set d 33; p2}
    proc p2 {} {p3}
    proc p3 {} {upvar 2 a x1 b x2 c x3 d x4; set a abc; list $x1 $x2 $x3 $x4 $a}
    p1 foo bar
} {foo bar 22 33 abc}
test upvar-1.3 {reading variables with upvar} {
    proc p1 {a b} {set c 22; set d 33; p2}
    proc p2 {} {p3}
    proc p3 {} {
    upvar #1 a x1 b x2 c x3 d x4
    set a abc
    list $x1 $x2 $x3 $x4 $a
    }
    p1 foo bar
} {foo bar 22 33 abc}
test upvar-1.4 {reading variables with upvar} {
    set x1 44
    set x2 55
    proc p1 {} {p2}
    proc p2 {} {
    upvar 2 x1 x1 x2 a
    upvar #0 x1 b
    set c $b
    incr b 3
    list $x1 $a $b
    }
    p1
} {47 55 47}
test upvar-1.4 {reading array elements with upvar} {
    proc p1 {} {set a(0) zeroth; set a(1) first; p2}
    proc p2 {} {upvar a(0) x; set x}
    p1
} {zeroth}

test upvar-2.1 {writing variables with upvar} {
    proc p1 {a b} {set c 22; set d 33; p2; list $a $b $c $d}
    proc p2 {} {
    upvar a x1 b x2 c x3 d x4
    set x1 14
    set x4 88
    }
    p1 foo bar
} {14 bar 22 88}
test upvar-2.2 {writing variables with upvar} {
    set x1 44
    set x2 55
    proc p1 {x1 x2} {
    upvar #0 x1 a
    upvar x2 b
    set a $x1
    set b $x2
    }
    p1 newbits morebits
    list $x1 $x2
} {newbits morebits}
test upvar-2.3 {writing variables with upvar} {
    catch {unset x1}
    catch {unset x2}
    proc p1 {x1 x2} {
    upvar #0 x1 a
    upvar x2 b
    set a $x1
    set b $x2
    }
    p1 newbits morebits
    list [catch {set x1} msg] $msg [catch {set x2} msg] $msg
} {0 newbits 0 morebits}
test upvar-2.4 {writing array elements with upvar} {
    proc p1 {} {set a(0) zeroth; set a(1) first; list [p2] $a(0)}
    proc p2 {} {upvar a(0) x; set x xyzzy}
    p1
} {xyzzy xyzzy}

test upvar-3.1 {unsetting variables with upvar} {
    proc p1 {a b} {set c 22; set d 33; p2; lsort [info vars]}
    proc p2 {} {
    upvar 1 a x1 d x2
    unset x1 x2
    }
    p1 foo bar
} {b c}
test upvar-3.2 {unsetting variables with upvar} {
    proc p1 {a b} {set c 22; set d 33; p2; lsort [info vars]}
    proc p2 {} {
    upvar 1 a x1 d x2
    unset x1 x2
    set x2 28
    }
    p1 foo bar
} {b c d}
test upvar-3.3 {unsetting variables with upvar} {
    set x1 44
    set x2 55
    proc p1 {} {p2}
    proc p2 {} {
    upvar 2 x1 a
    upvar #0 x2 b
    unset a b
    }
    p1
    list [info exists x1] [info exists x2]
} {0 0}
test upvar-3.4 {unsetting variables with upvar} {
    set x1 44
    set x2 55
    proc p1 {} {
    upvar x1 a x2 b
    unset a b
    set b 118
    }
    p1
    list [info exists x1] [catch {set x2} msg] $msg
} {0 0 118}
test upvar-3.5 {unsetting array elements with upvar} {
    proc p1 {} {
    set a(0) zeroth
    set a(1) first
    set a(2) second
    p2
    array names a
    }
    proc p2 {} {upvar a(0) x; unset x}
    p1
} {1 2}
test upvar-3.6 {unsetting then resetting array elements with upvar} {
    proc p1 {} {
    set a(0) zeroth
    set a(1) first
    set a(2) second
    p2
    list [array names a] [catch {set a(0)} msg] $msg
    }
    proc p2 {} {upvar a(0) x; unset x; set x 12345}
    p1
} {{0 1 2} 0 12345}

test upvar-4.1 {nested upvars} {
    set x1 88
    proc p1 {a b} {set c 22; set d 33; p2}
    proc p2 {} {global x1; upvar c x2; p3}
    proc p3 {} {
    upvar x1 a x2 b
    list $a $b
    }
    p1 14 15
} {88 22}
test upvar-4.2 {nested upvars} {
    set x1 88
    proc p1 {a b} {set c 22; set d 33; p2; list $a $b $c $d}
    proc p2 {} {global x1; upvar c x2; p3}
    proc p3 {} {
    upvar x1 a x2 b
    set a foo
    set b bar
    }
    list [p1 14 15] $x1
} {{14 15 bar 33} foo}

proc tproc {args} {global x; set x [list $args [uplevel info vars]]}
test upvar-5.1 {traces involving upvars} {
    proc p1 {a b} {set c 22; set d 33; trace var c rw tproc; p2}
    proc p2 {} {upvar c x1; set x1 22}
    set x ---
    p1 foo bar
    set x
} {{x1 {} w} x1}
test upvar-5.2 {traces involving upvars} {
    proc p1 {a b} {set c 22; set d 33; trace var c rw tproc; p2}
    proc p2 {} {upvar c x1; set x1}
    set x ---
    p1 foo bar
    set x
} {{x1 {} r} x1}
test upvar-5.3 {traces involving upvars} {
    proc p1 {a b} {set c 22; set d 33; trace var c rwu tproc; p2}
    proc p2 {} {upvar c x1; unset x1}
    set x ---
    p1 foo bar
    set x
} {{x1 {} u} x1}

test upvar-6.1 {retargeting an upvar} {
    proc p1 {} {
    set a(0) zeroth
    set a(1) first
    set a(2) second
    p2
    }
    proc p2 {} {
    upvar a x
    set result {}
    foreach i [array names x] {
        upvar a($i) x
        lappend result $x
    }
    lsort $result
    }
    p1
} {first second zeroth}
test upvar-6.2 {retargeting an upvar} {
    set x 44
    set y abcde
    proc p1 {} {
    global x
    set result $x
    upvar y x
    lappend result $x
    }
    p1
} {44 abcde}
test upvar-6.3 {retargeting an upvar} {
    set x 44
    set y abcde
    proc p1 {} {
    upvar y x
    lappend result $x
    global x
    lappend result $x
    }
    p1
} {abcde 44}

test upvar-7.1 {upvar to same level} {
    set x 44
    set y 55
    catch {unset uv}
    upvar #0 x uv
    set uv abc
    upvar 0 y uv
    set uv xyzzy
    list $x $y
} {abc xyzzy}
test upvar-7.2 {upvar to same level} {
    set x 1234
    set y 4567
    proc p1 {x y} {
    upvar 0 x uv
    set uv $y
    return "$x $y"
    }
    p1 44 89
} {89 89}
test upvar-7.3 {upvar to same level} {
    set x 1234
    set y 4567
    proc p1 {x y} {
    upvar #1 x uv
    set uv $y
    return "$x $y"
    }
    p1 xyz abc
} {abc abc}

test upvar-8.1 {errors in upvar command} {
    list [catch upvar msg] $msg
} {1 {wrong # args: should be "upvar ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-8.2 {errors in upvar command} {
    list [catch {upvar 1} msg] $msg
} {1 {wrong # args: should be "upvar ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-8.3 {errors in upvar command} {
    proc p1 {} {upvar a b c}
    list [catch p1 msg] $msg
} {1 {wrong # args: should be "upvar ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-8.4 {errors in upvar command} {
    proc p1 {} {set a 33; upvar b a}
    list [catch p1 msg] $msg
} {1 {variable "a" already exists}}