# This file tests the tclWinTime.c file.
#
# 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) 1997 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: @(#) winTime.test,v 1.5 2003/01/21 19:40:17 hunt Exp

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

# The next two tests will crash on Windows if the check for negative
# clock values is not done properly.

test winTime-1.1 {TclpGetDate} {pcOnly} {
    set ::env(TZ) JST-9
    set result [clock format -1 -format %Y]
    unset ::env(TZ)
    set result
} {1970}
test winTime-1.2 {TclpGetDate} {pcOnly} {
    set ::env(TZ) PST8
    set result [clock format 1 -format %Y]
    unset ::env(TZ)
    set result
} {1969}

# Next test tries to make sure that the Tcl clock stays in step
# with the Windows clock.  3000 iterations really isn't enough,
# but how many does a tester have patience for?

test winTime-2.1 {Synchronization of Tcl and Windows clocks} {pcOnly} {
    set failed 0
    foreach { sys_sec sys_usec tcl_sec tcl_usec } [testwinclock] {}
    set olddiff [expr { abs ( $tcl_sec - $sys_sec
			   + 1.0e-6 * ( $tcl_usec - $sys_usec ) ) }]
    set ok 1
    for { set i 0 } { $i < 3000 } { incr i } {
	foreach { sys_sec sys_usec tcl_sec tcl_usec } [testwinclock] {}
	set diff [expr { abs ( $tcl_sec - $sys_sec
			       + 1.0e-6 * ( $tcl_usec - $sys_usec ) ) }]
	if { ( $diff > $olddiff + 1000 )
	     || ( $diff > 11000 ) } {
	    set failed 1
	    break
	} else {
	    set olddiff $diff
	    after 1
	}
    }
    set failed
} {0}

# cleanup
::tcltest::cleanupTests
return