source: downloads/tcl8.5.2/tests/while-old.test @ 31

# Commands covered:  while
#
# This file contains the original set of tests for Tcl's while command.
# Since the while command is now compiled, a new set of tests covering
# the new implementation is in the file "while.test". 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) 1994-1996 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: while-old.test,v 1.8 2006/10/09 19:15:45 msofer Exp $

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

test while-old-1.1 {basic while loops} {
    set count 0
    while {$count < 10} {set count [expr $count+1]}
    set count
} 10
test while-old-1.2 {basic while loops} {
    set value xxx
    while {2 > 3} {set value yyy}
    set value
} xxx
test while-old-1.3 {basic while loops} {
    set value 1
    while {"true"} {
        incr value;
        if {$value > 5} {
            break;
        }
    }
    set value
} 6
test while-old-1.4 {basic while loops, multiline test expr} {
    set value 1
    while {($tcl_platform(platform) != "foobar1") && \
            ($tcl_platform(platform) != "foobar2")} {
        incr value
        break
    }
    set value
} {2}
test while-old-1.5 {basic while loops, test expr in quotes} {
    set value 1
    while "0 < 3" {set value 2; break}
    set value
} {2}

test while-old-2.1 {continue in while loop} {
    set list {1 2 3 4 5}
    set index 0
    set result {}
    while {$index < 5} {
        if {$index == 2} {set index [expr $index+1]; continue}
        set result [concat $result [lindex $list $index]]
        set index [expr $index+1]
    }
    set result
} {1 2 4 5}

test while-old-3.1 {break in while loop} {
    set list {1 2 3 4 5}
    set index 0
    set result {}
    while {$index < 5} {
        if {$index == 3} break
        set result [concat $result [lindex $list $index]]
        set index [expr $index+1]
    }
    set result
} {1 2 3}

test while-old-4.1 {errors in while loops} {
    set err [catch {while} msg]
    list $err $msg
} {1 {wrong # args: should be "while test command"}}
test while-old-4.2 {errors in while loops} {
    set err [catch {while 1} msg]
    list $err $msg
} {1 {wrong # args: should be "while test command"}}
test while-old-4.3 {errors in while loops} {
    set err [catch {while 1 2 3} msg]
    list $err $msg
} {1 {wrong # args: should be "while test command"}}
test while-old-4.4 {errors in while loops} {
    set err [catch {while {"a"+"b"} {error "loop aborted"}} msg]
    list $err $msg
} {1 {can't use non-numeric string as operand of "+"}}
test while-old-4.5 {errors in while loops} {
    catch {unset x}
    set x 1
    set err [catch {while {$x} {set x foo}} msg]
    list $err $msg
} {1 {expected boolean value but got "foo"}}
test while-old-4.6 {errors in while loops} {
    set err [catch {while {1} {error "loop aborted"}} msg]
    list $err $msg $::errorInfo
} {1 {loop aborted} {loop aborted
    while executing
"error "loop aborted""}}

test while-old-5.1 {while return result} {
    while {0} {set a 400}
} {}
test while-old-5.2 {while return result} {
    set x 1
    while {$x} {set x 0}
} {}

# cleanup
::tcltest::cleanupTests
return