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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 |