git/t/t4024-diff-optimize-common.sh
Jeff King e6821d09e4 t: fix some trivial cases of ignored exit codes in loops
These are all cases where we do a setup step of the form:

  for i in $foo; do
	  set_up $i || break
  done &&
  more_setup

would not notice a failure in set_up (because break always
returns a 0 exit code). These are just setup steps that we
do not expect to fail, but it does not hurt to be defensive.

Most can be fixed by converting the "break" to a "return 1"
(since we eval our tests inside a function for just this
purpose). A few of the loops are inside subshells, so we can
use just "exit 1" to break out of the subshell. And a few
can actually be made shorter by just unrolling the loop.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-25 10:25:27 -07:00

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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
x=zzzzzzzzzz ;# 10
y="$x$x$x$x$x$x$x$x$x$x" ;# 100
z="$y$y$y$y$y$y$y$y$y$y" ;# 1000
z1000=$z
z100=$y
z10=$x
zs() {
count="$1"
while test "$count" -ge 1000
do
count=$(($count - 1000))
printf "%s" $z1000
done
while test "$count" -ge 100
do
count=$(($count - 100))
printf "%s" $z100
done
while test "$count" -ge 10
do
count=$(($count - 10))
printf "%s" $z10
done
while test "$count" -ge 1
do
count=$(($count - 1))
printf "z"
done
}
zc () {
sed -e "/^index/d" \
-e "s/$z1000/Q/g" \
-e "s/QQQQQQQQQ/Z9000/g" \
-e "s/QQQQQQQQ/Z8000/g" \
-e "s/QQQQQQQ/Z7000/g" \
-e "s/QQQQQQ/Z6000/g" \
-e "s/QQQQQ/Z5000/g" \
-e "s/QQQQ/Z4000/g" \
-e "s/QQQ/Z3000/g" \
-e "s/QQ/Z2000/g" \
-e "s/Q/Z1000/g" \
-e "s/$z100/Q/g" \
-e "s/QQQQQQQQQ/Z900/g" \
-e "s/QQQQQQQQ/Z800/g" \
-e "s/QQQQQQQ/Z700/g" \
-e "s/QQQQQQ/Z600/g" \
-e "s/QQQQQ/Z500/g" \
-e "s/QQQQ/Z400/g" \
-e "s/QQQ/Z300/g" \
-e "s/QQ/Z200/g" \
-e "s/Q/Z100/g" \
-e "s/000Z//g" \
-e "s/$z10/Q/g" \
-e "s/QQQQQQQQQ/Z90/g" \
-e "s/QQQQQQQQ/Z80/g" \
-e "s/QQQQQQQ/Z70/g" \
-e "s/QQQQQQ/Z60/g" \
-e "s/QQQQQ/Z50/g" \
-e "s/QQQQ/Z40/g" \
-e "s/QQQ/Z30/g" \
-e "s/QQ/Z20/g" \
-e "s/Q/Z10/g" \
-e "s/00Z//g" \
-e "s/z/Q/g" \
-e "s/QQQQQQQQQ/Z9/g" \
-e "s/QQQQQQQQ/Z8/g" \
-e "s/QQQQQQQ/Z7/g" \
-e "s/QQQQQQ/Z6/g" \
-e "s/QQQQQ/Z5/g" \
-e "s/QQQQ/Z4/g" \
-e "s/QQQ/Z3/g" \
-e "s/QQ/Z2/g" \
-e "s/Q/Z1/g" \
-e "s/0Z//g" \
;
}
expect_pattern () {
cnt="$1"
cat <<EOF
diff --git a/file-a$cnt b/file-a$cnt
--- a/file-a$cnt
+++ b/file-a$cnt
@@ -1 +1 @@
-Z${cnt}a
+Z${cnt}A
diff --git a/file-b$cnt b/file-b$cnt
--- a/file-b$cnt
+++ b/file-b$cnt
@@ -1 +1 @@
-b
+B
diff --git a/file-c$cnt b/file-c$cnt
--- a/file-c$cnt
+++ b/file-c$cnt
@@ -1 +1 @@
-cZ$cnt
\ No newline at end of file
+CZ$cnt
\ No newline at end of file
diff --git a/file-d$cnt b/file-d$cnt
--- a/file-d$cnt
+++ b/file-d$cnt
@@ -1 +1 @@
-d
+D
EOF
}
sample='1023 1024 1025 2047 4095'
test_expect_success setup '
for n in $sample
do
( zs $n ; echo a ) >file-a$n &&
( echo b; zs $n; echo ) >file-b$n &&
( printf c; zs $n ) >file-c$n &&
( echo d; zs $n ) >file-d$n &&
git add file-a$n file-b$n file-c$n file-d$n &&
( zs $n ; echo A ) >file-a$n &&
( echo B; zs $n; echo ) >file-b$n &&
( printf C; zs $n ) >file-c$n &&
( echo D; zs $n ) >file-d$n &&
expect_pattern $n || return 1
done >expect
'
test_expect_success 'diff -U0' '
for n in $sample
do
git diff -U0 file-?$n
done | zc >actual &&
test_cmp expect actual
'
test_done