testConstraint testobj		[llength [info commands testobj]]
testConstraint testservicemode  [llength [info commands testservicemode]]
# Some things fail under Windows in Continuous Integration systems for subtle
# reasons such as CI often running with elevated privileges in a container.
testConstraint notWinCI [expr {
    $::tcl_platform(platform) ne "windows" || ![info exists ::env(CI)]}]
testConstraint notOSX [expr {$::tcl_platform(os) ne "Darwin"}]
testConstraint nodep [info exists tcl_precision]

# You need a *very* special environment to do some tests.  In
# particular, many file systems do not support large-files...
testConstraint largefileSupport [expr {$::tcl_platform(os) ne "Darwin"}]

# some tests can only be run is umask is 2
# if "umask" cannot be run, the tests will be skipped.

    set f [open $path(test1) w]
    fconfigure $f -encoding ascii -buffering line -translation crlf
    puts -nonewline $f "\n12"
    set x [contents $path(test1)]
    close $f
    set x
} "\r\n12"
test io-3.4 {WriteChars: loop over stage buffer} nodep {
test io-3.4 {WriteChars: loop over stage buffer} deprecated {
    # stage buffer maps to more than can be queued at once.

    set f [open $path(test1) w]
    fconfigure $f -encoding jis0208 -buffersize 16
    puts -nonewline $f "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"
    set x [list [contents $path(test1)]]
    close $f
    lappend x [contents $path(test1)]
} [list "!)!)!)!)!)!)!)!)" "!)!)!)!)!)!)!)!)!)!)!)!)!)!)!)"]
test io-3.5 {WriteChars: saved != 0} nodep {
test io-3.5 {WriteChars: saved != 0} deprecated {
    # Bytes produced by UtfToExternal from end of last channel buffer
    # had to be moved to beginning of next channel buffer to preserve
    # requested buffersize.

    set f [open $path(test1) w]
    fconfigure $f -encoding jis0208 -buffersize 17
    puts -nonewline $f "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"

    set f [open $path(test1) w]
    fconfigure $f -encoding shiftjis -buffersize 16
    puts -nonewline $f "12345678901234ＡＢ"
    set x [list [contents $path(test1)]]
    close $f
    lappend x [contents $path(test1)]
} [list "12345678901234\x82\x60" "12345678901234\x82\x60\x82\x61"]
test io-3.7 {WriteChars: (bufPtr->nextAdded > bufPtr->length)} nodep {
test io-3.7 {WriteChars: (bufPtr->nextAdded > bufPtr->length)} deprecated {
    # When translating UTF-8 to external, the produced bytes went past end
    # of the channel buffer.  This is done purpose -- we then truncate the
    # bytes at the end of the partial character to preserve the requested
    # blocksize on flush.  The truncated bytes are moved to the beginning
    # of the next channel buffer.

    set f [open $path(test1) w]

    close $f
    set f [open $path(test1)]
    fconfigure $f -encoding utf-8 -buffersize 10
    set in [read $f]
    close $f
    scan [string index $in end] %c
} 160
test io-12.9 {ReadChars: multibyte chars split} nodep {
test io-12.9 {ReadChars: multibyte chars split} deprecated {
    set f [open $path(test1) w]
    fconfigure $f -translation binary
    puts -nonewline $f [string repeat a 9]\xC2
    close $f
    set f [open $path(test1)]
    fconfigure $f -encoding utf-8 -buffersize 10
    set in [read $f]
    close $f
    scan [string index $in end] %c
} 194
test io-12.10 {ReadChars: multibyte chars split} nodep {
test io-12.10 {ReadChars: multibyte chars split} deprecated {
    set f [open $path(test1) w]
    fconfigure $f -translation binary
    puts -nonewline $f [string repeat a 9]\xC2
    close $f
    set f [open $path(test1)]
    fconfigure $f -encoding utf-8 -buffersize 11
    set in [read $f]