archie/tcl7.6/tests/event.test

# This file contains a collection of tests for the procedures in the file
# tclEvent.c, which includes the "after", "update", and "vwait" Tcl
# commands.  Sourcing this file into Tcl runs the tests and generates
# output for errors.  No output means no errors were found.
#
# Copyright (c) 1995-1996 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# "@(#) event.test 1.21 96/08/19 12:53:40"

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

if {[catch {testfilehandler create 0 off off}] == 0 } {
    test event-1.1 {Tcl_CreateFileHandler, reading} {
	testfilehandler close
	testfilehandler create 0 readable off
	testfilehandler clear 0
	testfilehandler oneevent
	set result ""
	lappend result [testfilehandler counts 0]
	testfilehandler fillpartial 0
	testfilehandler oneevent
	lappend result [testfilehandler counts 0]
	testfilehandler oneevent
	lappend result [testfilehandler counts 0]
	testfilehandler close
	set result
    } {{0 0} {1 0} {2 0}}
    test event-1.2 {Tcl_CreateFileHandler, writing} {nonPortable} {
	# This test is non-portable because on some systems (e.g.
	# SunOS 4.1.3) pipes seem to be writable always.
	testfilehandler close
	testfilehandler create 0 off writable
	testfilehandler clear 0
	testfilehandler oneevent
	set result ""
	lappend result [testfilehandler counts 0]
	testfilehandler fillpartial 0
	testfilehandler oneevent
	lappend result [testfilehandler counts 0]
	testfilehandler fill 0
	testfilehandler oneevent
	lappend result [testfilehandler counts 0]
	testfilehandler close
	set result
    } {{0 1} {0 2} {0 2}}
    test event-1.3 {Tcl_DeleteFileHandler} {
	testfilehandler close
	testfilehandler create 2 disabled disabled
	testfilehandler create 1 readable writable
	testfilehandler create 0 disabled disabled
	testfilehandler fillpartial 1
	set result ""
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler create 1 off off
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler close
	set result
    } {{0 1} {1 1} {1 2} {0 0}}

    test event-2.1 {Tcl_DeleteFileHandler} {
	testfilehandler close
	testfilehandler create 2 disabled disabled
	testfilehandler create 1 readable writable
	testfilehandler fillpartial 1
	set result ""
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler create 1 off off
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler close
	set result
    } {{0 1} {1 1} {1 2} {0 0}}
    test event-2.2 {Tcl_DeleteFileHandler, fd reused & events still pending} {
	testfilehandler close
	testfilehandler create 0 readable writable
	testfilehandler fillpartial 0
	set result ""
	testfilehandler oneevent
	lappend result [testfilehandler counts 0]
	testfilehandler close
	testfilehandler create 0 readable writable
	testfilehandler oneevent
	lappend result [testfilehandler counts 0]
	testfilehandler close
	set result
    } {{0 1} {0 0}}

    test event-3.1 {FileHandlerCheckProc, TCL_FILE_EVENTS off } {
	testfilehandler close
	testfilehandler create 1 readable writable
	testfilehandler fillpartial 1
	testfilehandler windowevent
	set result [testfilehandler counts 1]
	testfilehandler close
	set result
    } {0 0}

    test event-4.1 {FileHandlerEventProc, race between event and disabling } {
	testfilehandler close
	testfilehandler create 2 disabled disabled
	testfilehandler create 1 readable writable
	testfilehandler fillpartial 1
	set result ""
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler create 1 disabled disabled
	testfilehandler oneevent
	lappend result [testfilehandler counts 1]
	testfilehandler close
	set result
    } {{0 1} {1 1} {1 2} {0 0}}
    test event-4.2 {FileHandlerEventProc, TCL_FILE_EVENTS off } {
	testfilehandler close
	testfilehandler create 1 readable writable
	testfilehandler create 2 readable writable
	testfilehandler fillpartial 1
	testfilehandler fillpartial 2
	testfilehandler oneevent
	set result ""
	lappend result [testfilehandler counts 1] [testfilehandler counts 2]
	testfilehandler windowevent
	lappend result [testfilehandler counts 1] [testfilehandler counts 2]
	testfilehandler close
	set result
    } {{0 0} {0 1} {0 0} {0 1}}
    testfilehandler close
    update
}

test event-5.1 {Tcl_CreateTimerHandler procedure} {
    foreach i [after info] {
	after cancel $i
    }
    set x ""
    foreach i {100 200 1000 50 150} {
	after $i lappend x $i
    }
    after 200
    update
    set x
} {50 100 150 200}

test event-6.1 {Tcl_DeleteTimerHandler procedure} {
    foreach i [after info] {
	after cancel $i
    }
    set x ""
    foreach i {100 200 300 50 150} {
	after $i lappend x $i
    }
    after cancel lappend x 150
    after cancel lappend x 50
    after 200
    update
    set x
} {100 200}

if {[info commands testmodal] != ""} {
    test event-7.1 {Tcl_CreateModalTimeout and Tcl_DeleteModalTimeout procedures} {
	update
	set x {}
	set result {}
	testmodal create 50 first
	testmodal create 200 second
	after 100
	testmodal eventnotimers
	lappend result $x
	after 150
	testmodal eventnotimers
	lappend result $x
	testmodal delete
	testmodal eventnotimers
	lappend result $x
	testmodal eventnotimers
	lappend result $x
	testmodal delete
	testmodal eventnotimers
	lappend result $x
    } {{} second {second first} {second first first} {second first first}}
    
    test event-8.1 {TimerHandlerSetupProc procedure, choosing correct timer} {
	update
	set x {}
	after 100 {lappend x normal}
	testmodal create 200 modal
	vwait x
	testmodal delete
	set x
    } {normal}
    test event-8.2 {TimerHandlerSetupProc procedure, choosing correct timer} {
	update
	set x {}
	after 200 {lappend x normal}
	testmodal create 100 modal
	vwait x
	testmodal delete
	set x
    } {modal}
}

# No tests for TimerHandlerCheckProc:  it's already tested by other tests
# above and below.

test event-9.1 {TimerHandlerEventProc procedure} {
    foreach i [after info] {
	after cancel $i
    }
    foreach i {100 200 300} {
	after $i lappend x $i
    }
    after 100
    set result ""
    set x ""
    update
    lappend result $x
    after 100
    update
    lappend result $x
    after 100
    update
    lappend result $x
} {100 {100 200} {100 200 300}}

# No tests for Tcl_DoWhenIdle:  it's already tested by other tests
# below.

test event-10.1 {Tk_CancelIdleCall procedure} {
    foreach i [after info] {
	after cancel $i
    }
    set x before
    set y before
    set z before
    after idle set x after1
    after idle set y after2
    after idle set z after3
    after cancel set y after2
    update idletasks
    concat $x $y $z
} {after1 before after3}
test event-10.2 {Tk_CancelIdleCall procedure} {
    foreach i [after info] {
	after cancel $i
    }
    set x before
    set y before
    set z before
    after idle set x after1
    after idle set y after2
    after idle set z after3
    after cancel set x after1
    update idletasks
    concat $x $y $z
} {before after2 after3}

test event-11.1 {Tcl_ServiceIdle, self-rescheduling handlers} {
    foreach i [after info] {
	after cancel $i
    }
    set x 1
    set y 23
    after idle {incr x; after idle {incr x; after idle {incr x}}}
    after idle {incr y}
    vwait x
    set result "$x $y"
    update idletasks
    lappend result $x
} {2 24 4}

test event-12.1 {Tcl_BackgroundError, HandleBgErrors procedures} {
    catch {rename bgerror {}}
    proc bgerror msg {
	global errorInfo errorCode x
	lappend x [list $msg $errorInfo $errorCode]
    }
    after idle {error "a simple error"}
    after idle {open non_existent}
    after idle {set errorInfo foobar; set errorCode xyzzy}
    set x {}
    update idletasks
    rename bgerror {}
    set x
} {{{a simple error} {a simple error
    while executing
"error "a simple error""
    ("after" script)} NONE} {{couldn't open "non_existent": no such file or directory} {couldn't open "non_existent": no such file or directory
    while executing
"open non_existent"
    ("after" script)} {POSIX ENOENT {no such file or directory}}}}
test event-12.2 {Tcl_BackgroundError, HandleBgErrors procedures} {
    catch {rename bgerror {}}
    proc bgerror msg {
	global x
	lappend x $msg
	return -code break
    }
    after idle {error "a simple error"}
    after idle {open non_existent}
    set x {}
    update idletasks
    rename bgerror {}
    set x
} {{a simple error}}

test event-13.1 {BgErrorDeleteProc procedure} {
    catch {interp delete foo}
    interp create foo
    foo eval {
	proc bgerror args {
	    global errorInfo
	    set f [open err.out r+]
	    seek $f 0 end
	    puts $f "$args $errorInfo"
	    close $f
	}
	after 100 {error "first error"}
	after 100 {error "second error"}
    }
    makeFile Unmodified err.out
    after 100 {interp delete foo}
    after 200
    update
    set f [open err.out r]
    set result [read $f]
    close $f
    removeFile err.out
    set result
} {Unmodified
}

test event-14.1 {tkerror/bgerror backwards compabitility} {
    catch {rename bgerror {}}
    proc tkerror {x y} {
	return [expr $x + $y]
    }
    list [tkerror 4 7] [bgerror 8 -3]
} {11 5}
test event-14.2 {tkerror/bgerror backwards compabitility} {
    proc bgerror {x y} {
	return [expr 1 + $x + $y]
    }
    list [tkerror 6 -2] [bgerror 7 2]
} {5 10}
test event-14.3 {tkerror/bgerror backwards compabitility} {
    proc bgerror {x y} {
	return [expr 1 + $x + $y]
    }
    set result [list [info commands bgerror] [info commands tkerror]]
    rename tkerror {}
    lappend result [info commands bgerror] [info commands tkerror]
} {bgerror tkerror {} {}}
test event-14.4 {tkerror/bgerror backwards compabitility} {
    proc tkerror {x y} {
	return [expr 1 + $x + $y]
    }
    set result [list [info commands bgerror] [info commands tkerror]]
    rename bgerror {}
    lappend result [info commands bgerror] [info commands tkerror]
} {bgerror tkerror {} {}}
test event-14.5 {tkerror/bgerror backwards compabitility} {
    proc tkerror {x y} {
	return [expr 1 + $x + $y]
    }
    rename tkerror foo
    list [info commands bgerror] [info commands tkerror] [foo 4 3]
} {{} {} 8}
test event-14.6 {tkerror/bgerror backwards compabitility} {
    proc bgerror {x y} {
	return [expr 1 + $x + $y]
    }
    catch {rename foo {}}
    rename bgerror foo
    list [info commands bgerror] [info commands tkerror] [foo 4 3]
} {{} {} 8}
test event-14.7 {tkerror/bgerror backwards compabitility} {
    proc foo args {return $args}
    catch {rename tkerror {}}
    rename foo tkerror
    list [info commands bgerror] [info commands tkerror] [info commands foo] [tkerror a b c d]
} {bgerror tkerror {} {a b c d}}
test event-14.8 {tkerror/bgerror backwards compabitility} {
    proc foo args {return $args}
    catch {rename bgerror {}}
    rename foo bgerror
    list [info commands bgerror] [info commands tkerror] [info commands foo] [tkerror a b c d]
} {bgerror tkerror {} {a b c d}}
test event-14.9 {tkerror/bgerror backwards compabitility} {
    proc bgerror args {return $args}
    list [catch {rename bgerror tkerror} msg] $msg
} {1 {can't rename to "tkerror": command already exists}}
rename bgerror {}

if {[info commands testexithandler] != ""} {
    test event-15.1 {Tcl_CreateExitHandler procedure} {unixOrPc} {
	set child [open |[list [info nameofexecutable]] r+]
	puts $child "testexithandler create 41; testexithandler create 4"
	puts $child "testexithandler create 6; exit"
	flush $child
	set result [read $child]
	close $child
	set result
    } {even 6
even 4
odd 41
}

    test event-16.1 {Tcl_DeleteExitHandler procedure} {unixOrPc} {
	set child [open |[list [info nameofexecutable]] r+]
	puts $child "testexithandler create 41; testexithandler create 4"
	puts $child "testexithandler create 6; testexithandler delete 41"
	puts $child "testexithandler create 16; exit"
	flush $child
	set result [read $child]
	close $child
	set result
    } {even 16
even 6
even 4
}
    test event-16.2 {Tcl_DeleteExitHandler procedure} {unixOrPc} {
	set child [open |[list [info nameofexecutable]] r+]
	puts $child "testexithandler create 41; testexithandler create 4"
	puts $child "testexithandler create 6; testexithandler delete 4"
	puts $child "testexithandler create 16; exit"
	flush $child
	set result [read $child]
	close $child
	set result
    } {even 16
even 6
odd 41
}
    test event-16.3 {Tcl_DeleteExitHandler procedure} {unixOrPc} {
	set child [open |[list [info nameofexecutable]] r+]
	puts $child "testexithandler create 41; testexithandler create 4"
	puts $child "testexithandler create 6; testexithandler delete 6"
	puts $child "testexithandler create 16; exit"
	flush $child
	set result [read $child]
	close $child
	set result
    } {even 16
even 4
odd 41
}
    test event-16.4 {Tcl_DeleteExitHandler procedure} {unixOrPc} {
	set child [open |[list [info nameofexecutable]] r+]
	puts $child "testexithandler create 41; testexithandler delete 41"
	puts $child "testexithandler create 16; exit"
	flush $child
	set result [read $child]
	close $child
	set result
    } {even 16
}
}

test event-17.1 {Tcl_Exit procedure} {unixOrPc} {
    set child [open |[list [info nameofexecutable]] r+]
    puts $child "exit 3"
    list [catch {close $child} msg] $msg [lindex $errorCode 0] \
        [lindex $errorCode 2]
} {1 {child process exited abnormally} CHILDSTATUS 3}

test event-18.1 {Tcl_AfterCmd procedure, basics} {
    list [catch {after} msg] $msg
} {1 {wrong # args: should be "after option ?arg arg ...?"}}
test event-18.2 {Tcl_AfterCmd procedure, basics} {
    list [catch {after 2x} msg] $msg
} {1 {expected integer but got "2x"}}
test event-18.3 {Tcl_AfterCmd procedure, basics} {
    list [catch {after gorp} msg] $msg
} {1 {bad argument "gorp": must be cancel, idle, info, or a number}}
test event-18.4 {Tcl_AfterCmd procedure, ms argument} {
    set x before
    after 400 {set x after}
    after 200
    update
    set y $x
    after 400
    update
    list $y $x
} {before after}
test event-18.5 {Tcl_AfterCmd procedure, ms argument} {
    set x before
    after 300 set x after
    after 200
    update
    set y $x
    after 200
    update
    list $y $x
} {before after}
test event-18.6 {Tcl_AfterCmd procedure, cancel option} {
    list [catch {after cancel} msg] $msg
} {1 {wrong # args: should be "after cancel id|command"}}
test event-18.7 {Tcl_AfterCmd procedure, cancel option} {
    after cancel after#1
} {}
test event-18.8 {Tcl_AfterCmd procedure, cancel option} {
    after cancel {foo bar}
} {}
test event-18.9 {Tcl_AfterCmd procedure, cancel option} {
    foreach i [after info] {
	after cancel $i
    }
    set x before
    set y [after 100 set x after]
    after cancel $y
    after 200
    update
    set x
} {before}
test event-18.10 {Tcl_AfterCmd procedure, cancel option} {
    foreach i [after info] {
	after cancel $i
    }
    set x before
    after 100 set x after
    after cancel {set x after}
    after 200
    update
    set x
} {before}
test event-18.11 {Tcl_AfterCmd procedure, cancel option} {
    foreach i [after info] {
	after cancel $i
    }
    set x before
    after 100 set x after
    set id [after 300 set x after]
    after cancel $id
    after 200
    update
    set y $x
    set x cleared
    after 200
    update
    list $y $x
} {after cleared}
test event-18.12 {Tcl_AfterCmd procedure, cancel option} {
    foreach i [after info] {
	after cancel $i
    }
    set x first
    after idle lappend x second
    after idle lappend x third
    set i [after idle lappend x fourth]
    after cancel {lappend x second}
    after cancel $i
    update idletasks
    set x
} {first third}
test event-18.13 {Tcl_AfterCmd procedure, cancel option, multiple arguments for command} {
    foreach i [after info] {
	after cancel $i
    }
    set x first
    after idle lappend x second
    after idle lappend x third
    set i [after idle lappend x fourth]
    after cancel lappend x second
    after cancel $i
    update idletasks
    set x
} {first third}
test event-18.14 {Tcl_AfterCmd procedure, cancel option, cancel during handler, used to dump core} {
    foreach i [after info] {
	after cancel $i
    }
    set id [
	after 100 {
	    set x done
	    after cancel $id
	}
    ]
    vwait x
} {}
test event-18.15 {Tcl_AfterCmd procedure, cancel option, multiple interps} {
    foreach i [after info] {
	after cancel $i
    }
    interp create x
    x eval {set a before; set b before; after idle {set a a-after};
	    after idle {set b b-after}}
    set result [llength [x eval after info]]
    lappend result [llength [after info]]
    after cancel {set b b-after}
    set a aaa
    set b bbb
    x eval {after cancel set a a-after}
    update idletasks
    lappend result $a $b [x eval {list $a $b}]
    interp delete x
    set result
} {2 0 aaa bbb {before b-after}}
test event-18.16 {Tcl_AfterCmd procedure, idle option} {
    list [catch {after idle} msg] $msg
} {1 {wrong # args: should be "after idle script script ..."}}
test event-18.17 {Tcl_AfterCmd procedure, idle option} {
    set x before
    after idle {set x after}
    set y $x
    update idletasks
    list $y $x
} {before after}
test event-18.18 {Tcl_AfterCmd procedure, idle option} {
    set x before
    after idle set x after
    set y $x
    update idletasks
    list $y $x
} {before after}
set event1 [after idle event 1]
set event2 [after 1000 event 2]
interp create x
set childEvent [x eval {after idle event in child}]
test event-18.19 {Tcl_AfterCmd, info option} {
    lsort [after info]
} "$event1 $event2"
test event-18.20 {Tcl_AfterCmd, info option} {
    list [catch {after info a b} msg] $msg
} {1 {wrong # args: should be "after info ?id?"}}
test event-18.21 {Tcl_AfterCmd, info option} {
    list [catch {after info $childEvent} msg] $msg
} "1 {event \"$childEvent\" doesn't exist}"
test event-18.22 {Tcl_AfterCmd, info option} {
    list [after info $event1] [after info $event2]
} {{{event 1} idle} {{event 2} timer}}
after cancel $event1
after cancel $event2
interp delete x

set event [after idle foo bar]
scan $event after#%d id
test event-19.1 {GetAfterEvent procedure} {
    list [catch {after info xfter#$id} msg] $msg
} "1 {event \"xfter#$id\" doesn't exist}"
test event-19.2 {GetAfterEvent procedure} {
    list [catch {after info afterx$id} msg] $msg
} "1 {event \"afterx$id\" doesn't exist}"
test event-19.3 {GetAfterEvent procedure} {
    list [catch {after info after#ab} msg] $msg
} {1 {event "after#ab" doesn't exist}}
test event-19.4 {GetAfterEvent procedure} {
    list [catch {after info after#} msg] $msg
} {1 {event "after#" doesn't exist}}
test event-19.5 {GetAfterEvent procedure} {
    list [catch {after info after#${id}x} msg] $msg
} "1 {event \"after#${id}x\" doesn't exist}"
test event-19.6 {GetAfterEvent procedure} {
    list [catch {after info afterx[expr $id+1]} msg] $msg
} "1 {event \"afterx[expr $id+1]\" doesn't exist}"
after cancel $event

test event-20.1 {AfterProc procedure} {
    set x before
    proc foo {} {
	set x untouched
	after 100 {set x after}
	after 200
	update
	return $x
    }
    list [foo] $x
} {untouched after}
test event-20.2 {AfterProc procedure} {
    catch {rename bgerror {}}
    proc bgerror msg {
	global x errorInfo
	set x [list $msg $errorInfo]
    }
    set x empty
    after 100 {error "After error"}
    after 200
    set y $x
    update
    catch {rename bgerror {}}
    list $y $x
} {empty {{After error} {After error
    while executing
"error "After error""
    ("after" script)}}}
test event-20.3 {AfterProc procedure, deleting handler from itself} {
    foreach i [after info] {
	after cancel $i
    }
    proc foo {} {
	global x
	set x {}
	foreach i [after info] {
	    lappend x [after info $i]
	}
	after cancel foo
    }
    after idle foo
    after 1000 {error "I shouldn't ever have executed"}
    update idletasks
    set x
} {{{error "I shouldn't ever have executed"} timer}}
test event-20.4 {AfterProc procedure, deleting handler from itself} {
    foreach i [after info] {
	after cancel $i
    }
    proc foo {} {
	global x
	set x {}
	foreach i [after info] {
	    lappend x [after info $i]
	}
	after cancel foo
    }
    after 1000 {error "I shouldn't ever have executed"}
    after idle foo
    update idletasks
    set x
} {{{error "I shouldn't ever have executed"} timer}}
    foreach i [after info] {
	after cancel $i
    }

test event-21.1 {AfterCleanupProc procedure} {
    catch {interp delete x}
    interp create x
    x eval {after 200 {
	lappend x after
	puts "part 1: this message should not appear"
    }}
    after 200 {lappend x after2}
    x eval {after 200 {
	lappend x after3
	puts "part 2: this message should not appear"
    }}
    after 200 {lappend x after4}
    x eval {after 200 {
	lappend x after5
	puts "part 3: this message should not appear"
    }}
    interp delete x
    set x before
    after 300
    update
    set x
} {before after2 after4}

test event-22.1 {Tcl_VwaitCmd procedure} {
    list [catch {vwait} msg] $msg
} {1 {wrong # args: should be "vwait name"}}
test event-22.2 {Tcl_VwaitCmd procedure} {
    list [catch {vwait a b} msg] $msg
} {1 {wrong # args: should be "vwait name"}}
test event-22.3 {Tcl_VwaitCmd procedure} {
    catch {unset x}
    set x 1
    list [catch {vwait x(1)} msg] $msg
} {1 {can't trace "x(1)": variable isn't array}}
test event-22.4 {Tcl_VwaitCmd procedure} {
    foreach i [after info] {
	after cancel $i
    }
    after 100 {set x x-done}
    after 200 {set y y-done}
    after 300 {set z z-done}
    after idle {set q q-done}
    set x before
    set y before
    set z before
    set q before
    list [vwait y] $x $y $z $q
} {{} x-done y-done before q-done}

test event-23.1 {Tcl_UpdateCmd procedure} {
    list [catch {update a b} msg] $msg
} {1 {wrong # args: should be "update ?idletasks?"}}
test event-23.2 {Tcl_UpdateCmd procedure} {
    list [catch {update bogus} msg] $msg
} {1 {bad option "bogus": must be idletasks}}
test event-23.3 {Tcl_UpdateCmd procedure} {
    foreach i [after info] {
	after cancel $i
    }
    after 500 {set x after}
    after idle {set y after}
    after idle {set z "after, y = $y"}
    set x before
    set y before
    set z before
    update idletasks
    list $x $y $z
} {before after {after, y = after}}
test event-23.4 {Tcl_UpdateCmd procedure} {
    foreach i [after info] {
	after cancel $i
    }
    after 200 {set x x-done}
    after 500 {set y y-done}
    after idle {set z z-done}
    set x before
    set y before
    set z before
    after 300
    update
    list $x $y $z
} {x-done before z-done}

if {[info commands testfilehandler] != ""} {
    test event-24.1 {Tcl_WaitForFile procedure, readable} unixOnly {
	foreach i [after info] {
	    after cancel $i
	}
	after 100 set x timeout
	testfilehandler close
	testfilehandler create 1 off off
	set x "no timeout"
	set result [testfilehandler wait 1 readable 0]
	update
	testfilehandler close
	list $result $x
    } {{} {no timeout}}
    test event-24.2 {Tcl_WaitForFile procedure, readable} unixOnly {
	foreach i [after info] {
	    after cancel $i
	}
	after 100 set x timeout
	testfilehandler close
	testfilehandler create 1 off off
	set x "no timeout"
	set result [testfilehandler wait 1 readable 100]
	update
	testfilehandler close
	list $result $x
    } {{} timeout}
    test event-24.3 {Tcl_WaitForFile procedure, readable} unixOnly {
	foreach i [after info] {
	    after cancel $i
	}
	after 100 set x timeout
	testfilehandler close
	testfilehandler create 1 off off
	testfilehandler fillpartial 1
	set x "no timeout"
	set result [testfilehandler wait 1 readable 100]
	update
	testfilehandler close
	list $result $x
    } {readable {no timeout}}
    test event-24.4 {Tcl_WaitForFile procedure, writable} {unixOnly nonPortable} {
	foreach i [after info] {
	    after cancel $i
	}
	after 100 set x timeout
	testfilehandler close
	testfilehandler create 1 off off
	testfilehandler fill 1
	set x "no timeout"
	set result [testfilehandler wait 1 writable 0]
	update
	testfilehandler close
	list $result $x
    } {{} {no timeout}}
    test event-24.5 {Tcl_WaitForFile procedure, writable} {unixOnly nonPortable} {
	foreach i [after info] {
	    after cancel $i
	}
	after 100 set x timeout
	testfilehandler close
	testfilehandler create 1 off off
	testfilehandler fill 1
	set x "no timeout"
	set result [testfilehandler wait 1 writable 100]
	update
	testfilehandler close
	list $result $x
    } {{} timeout}
    test event-24.6 {Tcl_WaitForFile procedure, writable} unixOnly {
	foreach i [after info] {
	    after cancel $i
	}
	after 100 set x timeout
	testfilehandler close
	testfilehandler create 1 off off
	set x "no timeout"
	set result [testfilehandler wait 1 writable 100]
	update
	testfilehandler close
	list $result $x
    } {writable {no timeout}}
    test event-24.7 {Tcl_WaitForFile procedure, don't call other event handlers} unixOnly {
	foreach i [after info] {
	    after cancel $i
	}
	after 100 lappend x timeout
	after idle lappend x idle
	testfilehandler close
	testfilehandler create 1 off off
	set x ""
	set result [list [testfilehandler wait 1 readable 200] $x]
	update
	testfilehandler close
	lappend result $x
    } {{} {} {timeout idle}}
    test event-24.8 {Tcl_WaitForFile procedure, waiting indefinitely} unixOnly {
	set f [open "|sleep 2" r]
	set result ""
	lappend result [testfilewait $f readable 100]
	lappend result [testfilewait $f readable -1]
	close $f
	set result
    } {{} readable}
}

foreach i [after info] {
    after cancel $i
}