AT_INIT
AT_COLOR_TESTS

# NOTE: There is currently no way to influence the return
# code of SciTECO, except to provoke an error.
# Since errors cannot be yielded explicitly, we use the
# idiom "(0/0)" to enforce a "Division by zero" error
# whenever we want to fail.
#
# NOTE: Square brackets are significant for M4 but
# often required in TECO code as well.
# We therefore use double brackets [[ ... ]]
# (translated to [ ... ]) in simple cases where balanced
# brackets are required in TECO code as well and
# quadrigraphs (@<:@ and @:>@) in all other cases.

AT_BANNER([Features])

AT_SETUP([Missing left operand])
AT_CHECK([$SCITECO -e '+23='], 1, ignore, ignore)
AT_CLEANUP

AT_SETUP([Closing loops at the correct macro level])
AT_CHECK([$SCITECO -e '@^Ua{>} <Ma'], 1, ignore, ignore)
AT_CLEANUP

AT_SETUP([String arguments])
AT_CHECK([$SCITECO -e $'Ifoo^Q\e(0/0)\e'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '@I"foo^Q"(0/0)"'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '@I{foo{bar}foo^Q{(0/0)}'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '@Ia^EQa(0/0)a'], 0, ignore, ignore)
# TODO: String building characters
AT_CLEANUP

AT_SETUP([Q-Register definitions])
AT_CHECK([$SCITECO -e '0Ua'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '0U.a'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '0U#ab'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '0U.#ab'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '0U[[AB]]'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '0U.[[AB]]'], 0, ignore, ignore)
AT_CHECK([$SCITECO -e '0U[[AB^Q@:>@(0/0)]]'], 0, ignore, ignore)
# TODO: String building in Q-Register definitions
AT_CLEANUP

AT_SETUP([8-bit cleanlyness])
AT_CHECK([$SCITECO -e "0:@EUa/f^@^@/ :Qa-4\"N(0/0)' Ga Z= Z-4\"N(0/0)'"], 0, ignore, ignore)
AT_CLEANUP

AT_SETUP([Automatic EOL normalization])
AT_CHECK([$SCITECO -e "@EB'${srcdir}/autoeol-input.txt' EL-2\"N(0/0)' 2LR 13@I'' 0EL @EW'autoeol-sciteco.txt'"],
         0, ignore, ignore)
AT_CHECK([cmp autoeol-sciteco.txt ${srcdir}/autoeol-output.txt], 0, ignore, ignore)
AT_CLEANUP

AT_SETUP([Memory limiting])
AT_CHECK([$SCITECO -e "50*1000*1000,2EJ <@<:@a>"], 1, ignore, ignore)
AT_CLEANUP

AT_SETUP([Execute external command])
# TODO: It would be a better test to generate a random number of bytes.
# Unfortunately, neither $RANDOM, shuf nor jot are portable.
# So we have to wait until SciTECO supports a random number generator.
AT_CHECK([$SCITECO -e "@EC'dd if=/dev/zero bs=512 count=1' Z= Z-512\"N(0/0)'"], 0, ignore, ignore)
AT_CHECK([$SCITECO -e "0,128ED @EC'dd if=/dev/zero bs=512 count=1' Z= Z-512\"N(0/0)'"], 0, ignore, ignore)
AT_CLEANUP

AT_BANNER([Regression Tests])

AT_SETUP([Glob patterns with character classes])
# Also checks closing brackets as part of the character set.
AT_CHECK([$SCITECO -e ":@EN/*.[[@:>@ch]]/foo.h/\"F(0/0)'"], 0, ignore, ignore)
AT_CLEANUP

AT_SETUP([Glob patterns with unclosed trailing brackets])
AT_CHECK([$SCITECO -e ":@EN/*.@<:@h/foo.@<:@h/\"F(0/0)'"], 0, ignore, ignore)
AT_CLEANUP

AT_SETUP([Searching with large counts])
# Even though the search will be unsuccessful, it will not be considered
# a proper error, so the process return code is still 0.
AT_CHECK([$SCITECO -e "2147483647@S/foo/"], 0, ignore, ignore)
# Will always break the memory limit which is considered an error.
AT_CHECK([$SCITECO -e "-2147483648@S/foo/"], 1, ignore, ignore)
AT_CLEANUP

AT_SETUP([Memory limiting during spawning])
# This might result in an OOM if memory limiting is not working
AT_CHECK([$SCITECO -e "50*1000*1000,2EJ 0,128ED @EC'dd if=/dev/zero'"], 1, ignore, ignore)
AT_CLEANUP

AT_SETUP([Q-Register stack cleanup])
AT_CHECK([$SCITECO -e '@<:@a'], 0, ignore, ignore)
AT_CLEANUP

AT_SETUP([Empty search])
AT_CHECK([$SCITECO -e '@S//'], 0, ignore, ignore)
AT_CLEANUP

AT_BANNER([Known Bugs])

AT_SETUP([Pattern matching overflow])
# Should no longer dump core.
# It could fail because the memory limit is exceeed,
# but not in this case since the match string isn't too large.
AT_CHECK([$SCITECO -e '100000<@I"X">J @S"^EM^X"'], 0, ignore, ignore)
AT_XFAIL_IF(true)
AT_CLEANUP

AT_SETUP([Recursion overflow])
# On Mac OS we cannot always reliably provoke a stack overflow.
AT_SKIP_IF([case $host in *-*-darwin*) true;; *) false;; esac])
# Should no longer dump core.
# It could fail because the memory limit is exceeed,
# but not in this case since we limit the recursion.
AT_CHECK([$SCITECO -e "@^Um{U.a Q.a-100000\"<%.aMm'} 0Mm"], 0, ignore, ignore)
AT_XFAIL_IF(true)
AT_CLEANUP