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t4211: log: demonstrate -L bounds checking bug

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A bounds checking bug allows the X in -LX to extend one line past the
end of file. For example, given a file with 5 lines, -L6 is accepted as
valid. Demonstrate this problem.

While here, also add tests to check that the remaining cases of X and Y
in -LX,Y are handled correctly at and in the vicinity of end-of-file.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Sunshine 2013-07-31 04:15:39 -04:00 committed by Junio C Hamano
parent 164a9cf430
commit 25fb8ee445
1 changed files with 30 additions and 0 deletions
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t/t4211-line-log.sh
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@ -64,6 +64,36 @@ test_bad_opts "-L 1,1000:b.c" "has only.*lines"
test_bad_opts "-L :b.c" "argument.*not of the form"
test_bad_opts "-L :foo:b.c" "no match"
test_expect_success '-L X (X == nlines)' '
n=$(wc -l <b.c) &&
git log -L $n:b.c
'
test_expect_failure '-L X (X == nlines + 1)' '
n=$(expr $(wc -l <b.c) + 1) &&
test_must_fail git log -L $n:b.c
'
test_expect_success '-L X (X == nlines + 2)' '
n=$(expr $(wc -l <b.c) + 2) &&
test_must_fail git log -L $n:b.c
'
test_expect_success '-L ,Y (Y == nlines)' '
n=$(printf "%d" $(wc -l <b.c)) &&
git log -L ,$n:b.c
'
test_expect_success '-L ,Y (Y == nlines + 1)' '
n=$(expr $(wc -l <b.c) + 1) &&
test_must_fail git log -L ,$n:b.c
'
test_expect_success '-L ,Y (Y == nlines + 2)' '
n=$(expr $(wc -l <b.c) + 2) &&
test_must_fail git log -L ,$n:b.c
'
# There is a separate bug when an empty -L range is the first -L encountered,
# thus to demonstrate this particular bug, the empty -L range must follow a
# non-empty -L range.