t/t4024-diff-optimize-common.sh

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