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git/t/t0064-sha1-array.sh
René Scharfe 0eb0fb889e sha1-lookup: handle duplicates in sha1_pos()
If the first 18 bytes of the SHA1's of all entries are the same then
sha1_pos() dies and reports that the lower and upper limits of the
binary search were the same that this wasn't supposed to happen.  This
is wrong because the remaining two bytes could still differ.

Furthermore: It wouldn't be a problem if they actually were the same,
i.e. if all entries have the same SHA1.  The code already handles
duplicates just fine.  Simply remove the erroneous check.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-01 13:32:19 -07:00

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#!/bin/sh
test_description='basic tests for the SHA1 array implementation'
. ./test-lib.sh
echo20 () {
prefix="${1:+$1 }"
shift
while test $# -gt 0
do
echo "$prefix$1$1$1$1$1$1$1$1$1$1$1$1$1$1$1$1$1$1$1$1"
shift
done
}
test_expect_success 'ordered enumeration' '
echo20 "" 44 55 88 aa >expect &&
{
echo20 append 88 44 aa 55 &&
echo for_each_unique
} | test-sha1-array >actual &&
test_cmp expect actual
'
test_expect_success 'ordered enumeration with duplicate suppression' '
echo20 "" 44 55 88 aa >expect &&
{
echo20 append 88 44 aa 55 &&
echo20 append 88 44 aa 55 &&
echo for_each_unique
} | test-sha1-array >actual &&
test_cmp expect actual
'
test_expect_success 'lookup' '
{
echo20 append 88 44 aa 55 &&
echo20 lookup 55
} | test-sha1-array >actual &&
n=$(cat actual) &&
test "$n" -eq 1
'
test_expect_success 'lookup non-existing entry' '
{
echo20 append 88 44 aa 55 &&
echo20 lookup 33
} | test-sha1-array >actual &&
n=$(cat actual) &&
test "$n" -lt 0
'
test_expect_success 'lookup with duplicates' '
{
echo20 append 88 44 aa 55 &&
echo20 append 88 44 aa 55 &&
echo20 lookup 55
} | test-sha1-array >actual &&
n=$(cat actual) &&
test "$n" -ge 2 &&
test "$n" -le 3
'
test_expect_success 'lookup non-existing entry with duplicates' '
{
echo20 append 88 44 aa 55 &&
echo20 append 88 44 aa 55 &&
echo20 lookup 66
} | test-sha1-array >actual &&
n=$(cat actual) &&
test "$n" -lt 0
'
test_expect_success 'lookup with almost duplicate values' '
{
echo "append 5555555555555555555555555555555555555555" &&
echo "append 555555555555555555555555555555555555555f" &&
echo20 lookup 55
} | test-sha1-array >actual &&
n=$(cat actual) &&
test "$n" -eq 0
'
test_expect_success 'lookup with single duplicate value' '
{
echo20 append 55 55 &&
echo20 lookup 55
} | test-sha1-array >actual &&
n=$(cat actual) &&
test "$n" -ge 0 &&
test "$n" -le 1
'
test_done