t/t4024-diff-optimize-common.sh

   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 || break
 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
 152         done | zc >actual &&
 153         test_cmp expect actual
 154
 155 '
 156
 157 test_done