Sprite 1984 - 1993/Sprite 1984 - 1993.iso/src/lib/tcl/dist6.3/tests/upvar.test

Text File | 1991-10-03 | 5.3 KB | 198 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 1991 Regents of the University of California
# Permission to use, copy, modify, and distribute this
# software and its documentation for any purpose and without
# fee is hereby granted, provided that this copyright notice
# appears in all copies.  The University of California makes no
# representations about the suitability of this software for any
# purpose.  It is provided "as is" without express or implied
# warranty.
#
# $Header: /sprite/src/lib/tcl/tests/RCS/upvar.test,v 1.1 91/10/03 16:47:56 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-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-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-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 {errors in upvar command} {
    list [catch upvar msg] $msg
} {1 {wrong # args: should be "upvar ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-6.2 {errors in upvar command} {
    list [catch {upvar 1} msg] $msg
} {1 {wrong # args: should be "upvar ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-6.3 {errors in upvar command} {
    list [catch {upvar a b} msg] $msg
} {1 {already at top level}}
test upvar-6.4 {errors in upvar command} {
    list [catch {upvar 1 a b} msg] $msg
} {1 {already at top level}}
test upvar-6.5 {errors in upvar command} {
    list [catch {upvar #0 a b} msg] $msg
} {1 {already at top level}}
test upvar-6.6 {errors in upvar command} {
    proc p1 {} {upvar a b c}
    list [catch p1 msg] $msg
} {1 {wrong # args: should be "a ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-6.7 {errors in upvar command} {
    proc p1 {} {set a 33; upvar b a}
    list [catch p1 msg] $msg
} {1 {variable "a" already exists}}