git/t/t4019-diff-wserror.sh
Junio C Hamano d68fe26f3e diff --whitespace: fix blank lines at end
The earlier logic tried to colour any and all blank lines that were added
beyond the last blank line in the original, but this was very wrong.  If
you added 96 blank lines, a non-blank line, and then 3 blank lines at the
end, only the last 3 lines should trigger the error, not the earlier 96
blank lines.

We need to also make sure that the lines are after the last non-blank line
in the postimage as well before deciding to paint them.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-09-14 22:18:36 -07:00

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#!/bin/sh
test_description='diff whitespace error detection'
. ./test-lib.sh
test_expect_success setup '
git config diff.color.whitespace "blue reverse" &&
>F &&
git add F &&
echo " Eight SP indent" >>F &&
echo " HT and SP indent" >>F &&
echo "With trailing SP " >>F &&
echo "Carriage ReturnQ" | tr Q "\015" >>F &&
echo "No problem" >>F &&
echo >>F
'
blue_grep='7;34m' ;# ESC [ 7 ; 3 4 m
test_expect_success default '
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With error >/dev/null &&
grep Return error >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'without -trail' '
git config core.whitespace -trail
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With normal >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'without -trail (attribute)' '
git config --unset core.whitespace
echo "F whitespace=-trail" >.gitattributes
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With normal >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'without -space' '
rm -f .gitattributes
git config core.whitespace -space
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight normal >/dev/null &&
grep HT normal >/dev/null &&
grep With error >/dev/null &&
grep Return error >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'without -space (attribute)' '
git config --unset core.whitespace
echo "F whitespace=-space" >.gitattributes
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight normal >/dev/null &&
grep HT normal >/dev/null &&
grep With error >/dev/null &&
grep Return error >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'with indent-non-tab only' '
rm -f .gitattributes
git config core.whitespace indent,-trailing,-space
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight error >/dev/null &&
grep HT normal >/dev/null &&
grep With normal >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'with indent-non-tab only (attribute)' '
git config --unset core.whitespace
echo "F whitespace=indent,-trailing,-space" >.gitattributes
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight error >/dev/null &&
grep HT normal >/dev/null &&
grep With normal >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'with cr-at-eol' '
rm -f .gitattributes
git config core.whitespace cr-at-eol
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With error >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'with cr-at-eol (attribute)' '
git config --unset core.whitespace
echo "F whitespace=trailing,cr-at-eol" >.gitattributes
git diff --color >output
grep "$blue_grep" output >error
grep -v "$blue_grep" output >normal
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With error >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'trailing empty lines (1)' '
rm -f .gitattributes &&
test_must_fail git diff --check >output &&
grep "new blank line at" output &&
grep "trailing whitespace" output
'
test_expect_success 'trailing empty lines (2)' '
echo "F -whitespace" >.gitattributes &&
git diff --check >output &&
! test -s output
'
test_expect_success 'do not color trailing cr in context' '
git config --unset core.whitespace
rm -f .gitattributes &&
echo AAAQ | tr Q "\015" >G &&
git add G &&
echo BBBQ | tr Q "\015" >>G
git diff --color G | tr "\015" Q >output &&
grep "BBB.*${blue_grep}Q" output &&
grep "AAA.*\[mQ" output
'
test_expect_success 'color new trailing blank lines' '
{ echo a; echo b; echo; echo; } >x &&
git add x &&
{ echo a; echo; echo; echo; echo c; echo; echo; echo; echo; } >x &&
git diff --color x >output &&
cnt=$(grep "${blue_grep}" output | wc -l) &&
test $cnt = 2
'
test_done