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git/t/t4024-diff-optimize-common.sh
Junio C Hamano 079fe1dae8 Re-re-re-fix common tail optimization
We need to be extra careful recovering the removed common section, so
that we do not break context nor the changed incomplete line (i.e. the
last line that does not end with LF).

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-16 14:00:30 -08:00

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#!/bin/sh
test_description='common tail optimization'
. ./test-lib.sh
z=zzzzzzzz ;# 8
z="$z$z$z$z$z$z$z$z" ;# 64
z="$z$z$z$z$z$z$z$z" ;# 512
z="$z$z$z$z" ;# 2048
z2047=$(expr "$z" : '.\(.*\)') ; #2047
test_expect_success setup '
echo "a$z2047" >file-a &&
echo "b" >file-b &&
echo "$z2047" >>file-b &&
echo "c$z2047" | tr -d "\012" >file-c &&
echo "d" >file-d &&
echo "$z2047" | tr -d "\012" >>file-d &&
git add file-a file-b file-c file-d &&
echo "A$z2047" >file-a &&
echo "B" >file-b &&
echo "$z2047" >>file-b &&
echo "C$z2047" | tr -d "\012" >file-c &&
echo "D" >file-d &&
echo "$z2047" | tr -d "\012" >>file-d
'
cat >expect <<\EOF
diff --git a/file-a b/file-a
--- a/file-a
+++ b/file-a
@@ -1 +1 @@
-aZ
+AZ
diff --git a/file-b b/file-b
--- a/file-b
+++ b/file-b
@@ -1 +1 @@
-b
+B
diff --git a/file-c b/file-c
--- a/file-c
+++ b/file-c
@@ -1 +1 @@
-cZ
\ No newline at end of file
+CZ
\ No newline at end of file
diff --git a/file-d b/file-d
--- a/file-d
+++ b/file-d
@@ -1 +1 @@
-d
+D
EOF
test_expect_success 'diff -U0' '
git diff -U0 | sed -e "/^index/d" -e "s/$z2047/Z/g" >actual &&
diff -u expect actual
'
test_done