# Commands covered:  while
#
# 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: /a/cvs/386BSD/ports/tcl/tests/while.test,v 1.1.1.1 1993/08/09 10:57:46 alm Exp $ (Berkeley)

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

test while-1.1 {basic while loops} {
    set count 0
    while {$count < 10} {set count [expr $count+1]}
    set count
} 10
test while-1.2 {basic while loops} {
    set value xxx
    while {2 > 3} {set value yyy}
    set value
} xxx

test while-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-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-4.1 {errors in while loops} {
    set err [catch {while} msg]
    list $err $msg
} {1 {wrong # args: should be "while test command"}}
test while-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-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-4.4 {errors in while loops} {
    set err [catch {while {"a"+"b"} {error "loop aborted"}} msg]
    list $err $msg
} {1 {can't use non-numeric string as operand of "+"}}
test while-4.5 {errors in while loops} {
    set x 1
    set err [catch {while {$x} {set x foo}} msg]
    list $err $msg
} {1 {expression didn't have numeric value}}
test while-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""
    ("while" body line 1)
    invoked from within
"while {1} {error "loop aborted"}"}}

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