| 1 | #!/bin/sh |
| 2 | |
| 3 | test_description='common tail optimization' |
| 4 | |
| 5 | . ./test-lib.sh |
| 6 | |
| 7 | z=zzzzzzzz ;# 8 |
| 8 | z="$z$z$z$z$z$z$z$z" ;# 64 |
| 9 | z="$z$z$z$z$z$z$z$z" ;# 512 |
| 10 | z="$z$z$z$z" ;# 2048 |
| 11 | z2047=$(expr "$z" : '.\(.*\)') ; #2047 |
| 12 | |
| 13 | x=zzzzzzzzzz ;# 10 |
| 14 | y="$x$x$x$x$x$x$x$x$x$x" ;# 100 |
| 15 | z="$y$y$y$y$y$y$y$y$y$y" ;# 1000 |
| 16 | z1000=$z |
| 17 | z100=$y |
| 18 | z10=$x |
| 19 | |
| 20 | zs() { |
| 21 | count="$1" |
| 22 | while test "$count" -ge 1000 |
| 23 | do |
| 24 | count=$(($count - 1000)) |
| 25 | printf "%s" $z1000 |
| 26 | done |
| 27 | while test "$count" -ge 100 |
| 28 | do |
| 29 | count=$(($count - 100)) |
| 30 | printf "%s" $z100 |
| 31 | done |
| 32 | while test "$count" -ge 10 |
| 33 | do |
| 34 | count=$(($count - 10)) |
| 35 | printf "%s" $z10 |
| 36 | done |
| 37 | while test "$count" -ge 1 |
| 38 | do |
| 39 | count=$(($count - 1)) |
| 40 | printf "z" |
| 41 | done |
| 42 | } |
| 43 | |
| 44 | zc () { |
| 45 | sed -e "/^index/d" \ |
| 46 | -e "s/$z1000/Q/g" \ |
| 47 | -e "s/QQQQQQQQQ/Z9000/g" \ |
| 48 | -e "s/QQQQQQQQ/Z8000/g" \ |
| 49 | -e "s/QQQQQQQ/Z7000/g" \ |
| 50 | -e "s/QQQQQQ/Z6000/g" \ |
| 51 | -e "s/QQQQQ/Z5000/g" \ |
| 52 | -e "s/QQQQ/Z4000/g" \ |
| 53 | -e "s/QQQ/Z3000/g" \ |
| 54 | -e "s/QQ/Z2000/g" \ |
| 55 | -e "s/Q/Z1000/g" \ |
| 56 | -e "s/$z100/Q/g" \ |
| 57 | -e "s/QQQQQQQQQ/Z900/g" \ |
| 58 | -e "s/QQQQQQQQ/Z800/g" \ |
| 59 | -e "s/QQQQQQQ/Z700/g" \ |
| 60 | -e "s/QQQQQQ/Z600/g" \ |
| 61 | -e "s/QQQQQ/Z500/g" \ |
| 62 | -e "s/QQQQ/Z400/g" \ |
| 63 | -e "s/QQQ/Z300/g" \ |
| 64 | -e "s/QQ/Z200/g" \ |
| 65 | -e "s/Q/Z100/g" \ |
| 66 | -e "s/000Z//g" \ |
| 67 | -e "s/$z10/Q/g" \ |
| 68 | -e "s/QQQQQQQQQ/Z90/g" \ |
| 69 | -e "s/QQQQQQQQ/Z80/g" \ |
| 70 | -e "s/QQQQQQQ/Z70/g" \ |
| 71 | -e "s/QQQQQQ/Z60/g" \ |
| 72 | -e "s/QQQQQ/Z50/g" \ |
| 73 | -e "s/QQQQ/Z40/g" \ |
| 74 | -e "s/QQQ/Z30/g" \ |
| 75 | -e "s/QQ/Z20/g" \ |
| 76 | -e "s/Q/Z10/g" \ |
| 77 | -e "s/00Z//g" \ |
| 78 | -e "s/z/Q/g" \ |
| 79 | -e "s/QQQQQQQQQ/Z9/g" \ |
| 80 | -e "s/QQQQQQQQ/Z8/g" \ |
| 81 | -e "s/QQQQQQQ/Z7/g" \ |
| 82 | -e "s/QQQQQQ/Z6/g" \ |
| 83 | -e "s/QQQQQ/Z5/g" \ |
| 84 | -e "s/QQQQ/Z4/g" \ |
| 85 | -e "s/QQQ/Z3/g" \ |
| 86 | -e "s/QQ/Z2/g" \ |
| 87 | -e "s/Q/Z1/g" \ |
| 88 | -e "s/0Z//g" \ |
| 89 | ; |
| 90 | } |
| 91 | |
| 92 | expect_pattern () { |
| 93 | cnt="$1" |
| 94 | cat <<EOF |
| 95 | diff --git a/file-a$cnt b/file-a$cnt |
| 96 | --- a/file-a$cnt |
| 97 | +++ b/file-a$cnt |
| 98 | @@ -1 +1 @@ |
| 99 | -Z${cnt}a |
| 100 | +Z${cnt}A |
| 101 | diff --git a/file-b$cnt b/file-b$cnt |
| 102 | --- a/file-b$cnt |
| 103 | +++ b/file-b$cnt |
| 104 | @@ -1 +1 @@ |
| 105 | -b |
| 106 | +B |
| 107 | diff --git a/file-c$cnt b/file-c$cnt |
| 108 | --- a/file-c$cnt |
| 109 | +++ b/file-c$cnt |
| 110 | @@ -1 +1 @@ |
| 111 | -cZ$cnt |
| 112 | \ No newline at end of file |
| 113 | +CZ$cnt |
| 114 | \ No newline at end of file |
| 115 | diff --git a/file-d$cnt b/file-d$cnt |
| 116 | --- a/file-d$cnt |
| 117 | +++ b/file-d$cnt |
| 118 | @@ -1 +1 @@ |
| 119 | -d |
| 120 | +D |
| 121 | EOF |
| 122 | } |
| 123 | |
| 124 | sample='1023 1024 1025 2047 4095' |
| 125 | |
| 126 | test_expect_success setup ' |
| 127 | |
| 128 | for n in $sample |
| 129 | do |
| 130 | ( zs $n && echo a ) >file-a$n && |
| 131 | ( echo b && zs $n && echo ) >file-b$n && |
| 132 | ( printf c && zs $n ) >file-c$n && |
| 133 | ( echo d && zs $n ) >file-d$n && |
| 134 | |
| 135 | git add file-a$n file-b$n file-c$n file-d$n && |
| 136 | |
| 137 | ( zs $n && echo A ) >file-a$n && |
| 138 | ( echo B && zs $n && echo ) >file-b$n && |
| 139 | ( printf C && zs $n ) >file-c$n && |
| 140 | ( echo D && zs $n ) >file-d$n && |
| 141 | |
| 142 | expect_pattern $n || return 1 |
| 143 | |
| 144 | done >expect |
| 145 | ' |
| 146 | |
| 147 | test_expect_success 'diff -U0' ' |
| 148 | |
| 149 | for n in $sample |
| 150 | do |
| 151 | git diff -U0 file-?$n || return 1 |
| 152 | done | zc >actual && |
| 153 | test_cmp expect actual |
| 154 | |
| 155 | ' |
| 156 | |
| 157 | test_done |