AT_BANNER([sparse external arrays])

m4_divert_push([PREPARE_TESTS])
[sparse_xarray_queue_limit () {
  # Each on-disk sparse_xarray eats up a file descriptor, so for the
  # tests that involve on-disk sparse_xarrays we need to limit the
  # maximum length of the queue.  Figure out how many file descriptors
  # we can let the test program open at once.
  OPEN_MAX=`getconf OPEN_MAX 2>/dev/null`
  case $OPEN_MAX in
    [0-9]*)
      # Divide by 2 because some fds are used by other code.
      queue_limit=`expr $OPEN_MAX / 2` 
      ;;
    undefined) 
      # Assume that any system with a dynamic fd limit has a large limit.
      queue_limit=500 
      ;;
    *)
      case `uname -m 2>/dev/null` in
	CYGWIN*)
	  # Cygwin claims a 256-fd limit as OPEN_MAX in <limits.h>.
	  queue_limit=128
	  ;;
	MINGW*)
	  # The following email claims that Mingw should have a
	  # 2048-fd limit:
	  # http://www.mail-archive.com/squid-users@squid-cache.org/msg35249.html
	  queue_limit=1024
	  ;;
	*)
	  # This seems fairly conservative these days.
	  queue_limit=50
	  ;;
      esac
      ;;
  esac
  echo "$queue_limit"
}]
m4_divert_pop([PREPARE_TESTS])

AT_SETUP([in-memory sparse_xarray])
dnl --values=3 would be a slightly better test but takes much longer.
AT_CHECK([sparse-xarray-test$EXEEXT \
	    --verbosity=0 --queue-limit=`sparse_xarray_queue_limit` \
	    --columns=3 --max-rows=3 --max-memory-rows=3 --values=2],
  [0], [ignore], [ignore])
AT_CLEANUP

m4_define([SPARSE_XARRAY_ON_DISK],
  [AT_SETUP([on-disk sparse_xarray max-memory-rows=$1])
   AT_CHECK([sparse-xarray-test$EXEEXT \
	       --verbosity=0 --queue-limit=`sparse_xarray_queue_limit` \
               --columns=2 --max-rows=3 --max-memory-rows=$1 --values=2],
     [0], [ignore], [ignore])
   AT_CLEANUP])
SPARSE_XARRAY_ON_DISK([0])
SPARSE_XARRAY_ON_DISK([1])
SPARSE_XARRAY_ON_DISK([2])

AT_SETUP([copying between in-memory sparse_xarrays])
AT_KEYWORDS([sparse_xarray])
AT_CHECK([sparse-xarray-test$EXEEXT \
	    --verbosity=0 --queue-limit=`sparse_xarray_queue_limit` \
 	    --columns=2 --max-rows=2 --max-memory-rows=2 --values=2 \
	    --xarrays=2 --no-write-rows --no-copy-columns],
  [0], [ignore], [ignore])
AT_CLEANUP

m4_define([SPARSE_XARRAY_COPY_DISK],
  [AT_SETUP([copying between on-disk sparse_xarrays max-memory-rows=$1])
   AT_KEYWORDS([sparse_xarray])
   limit=`sparse_xarray_queue_limit`
   AT_CHECK([sparse-xarray-test$EXEEXT \
               --verbosity=0 --queue-limit=`expr $limit / 2` \
	       --columns=1 --max-rows=2 --max-memory-rows=$max_memory_rows \
	       --values=2 --xarrays=2 --no-write-rows --no-copy-columns],
            [0], [ignore], [ignore])
   AT_CLEANUP])
dnl These parameters are ridiculously low, but it's necessary
dnl unless we want the tests to take a very long time.
SPARSE_XARRAY_COPY_DISK([0])
SPARSE_XARRAY_COPY_DISK([1])