t/t4051-diff-function-context.sh

   1 #!/bin/sh
   2
   3 test_description='diff function context'
   4
   5 . ./test-lib.sh
   6
   7 dir="$TEST_DIRECTORY/t4051"
   8
   9 commit_and_tag () {
  10         tag=$1 &&
  11         shift &&
  12         git add "$@" &&
  13         test_tick &&
  14         git commit -m "$tag" &&
  15         git tag "$tag"
  16 }
  17
  18 first_context_line () {
  19         awk '
  20                 found {print; exit}
  21                 /^@@/ {found = 1}
  22         '
  23 }
  24
  25 last_context_line () {
  26         sed -ne \$p
  27 }
  28
  29 check_diff () {
  30         name=$1
  31         desc=$2
  32         options="-W $3"
  33
  34         test_expect_success "$desc" '
  35                 git diff $options "$name^" "$name" >"$name.diff"
  36         '
  37
  38         test_expect_success ' diff applies' '
  39                 test_when_finished "git reset --hard" &&
  40                 git checkout --detach "$name^" &&
  41                 git apply --index "$name.diff" &&
  42                 git diff --exit-code "$name"
  43         '
  44 }
  45
  46 test_expect_success 'setup' '
  47         cat "$dir/includes.c" "$dir/dummy.c" "$dir/dummy.c" "$dir/hello.c" \
  48                 "$dir/dummy.c" "$dir/dummy.c" >file.c &&
  49         commit_and_tag initial file.c &&
  50
  51         grep -v "delete me from hello" <file.c >file.c.new &&
  52         mv file.c.new file.c &&
  53         commit_and_tag changed_hello file.c &&
  54
  55         grep -v "delete me from includes" <file.c >file.c.new &&
  56         mv file.c.new file.c &&
  57         commit_and_tag changed_includes file.c &&
  58
  59         cat "$dir/appended1.c" >>file.c &&
  60         commit_and_tag appended file.c &&
  61
  62         cat "$dir/appended2.c" >>file.c &&
  63         commit_and_tag extended file.c &&
  64
  65         grep -v "Begin of second part" <file.c >file.c.new &&
  66         mv file.c.new file.c &&
  67         commit_and_tag long_common_tail file.c
  68 '
  69
  70 check_diff changed_hello 'changed function'
  71
  72 test_expect_success ' context includes begin' '
  73         grep "^ .*Begin of hello" changed_hello.diff
  74 '
  75
  76 test_expect_success ' context includes end' '
  77         grep "^ .*End of hello" changed_hello.diff
  78 '
  79
  80 test_expect_success ' context does not include other functions' '
  81         test $(grep -c "^[ +-].*Begin" changed_hello.diff) -le 1
  82 '
  83
  84 test_expect_success ' context does not include preceding empty lines' '
  85         test "$(first_context_line <changed_hello.diff)" != " "
  86 '
  87
  88 test_expect_failure ' context does not include trailing empty lines' '
  89         test "$(last_context_line <changed_hello.diff)" != " "
  90 '
  91
  92 check_diff changed_includes 'changed includes'
  93
  94 test_expect_success ' context includes begin' '
  95         grep "^ .*Begin.h" changed_includes.diff
  96 '
  97
  98 test_expect_success ' context includes end' '
  99         grep "^ .*End.h" changed_includes.diff
 100 '
 101
 102 test_expect_success ' context does not include other functions' '
 103         test $(grep -c "^[ +-].*Begin" changed_includes.diff) -le 1
 104 '
 105
 106 test_expect_failure ' context does not include trailing empty lines' '
 107         test "$(last_context_line <changed_includes.diff)" != " "
 108 '
 109
 110 check_diff appended 'appended function'
 111
 112 test_expect_success ' context includes begin' '
 113         grep "^[+].*Begin of first part" appended.diff
 114 '
 115
 116 test_expect_success ' context includes end' '
 117         grep "^[+].*End of first part" appended.diff
 118 '
 119
 120 test_expect_success ' context does not include other functions' '
 121         test $(grep -c "^[ +-].*Begin" appended.diff) -le 1
 122 '
 123
 124 check_diff extended 'appended function part'
 125
 126 test_expect_success ' context includes begin' '
 127         grep "^ .*Begin of first part" extended.diff
 128 '
 129
 130 test_expect_success ' context includes end' '
 131         grep "^[+].*End of second part" extended.diff
 132 '
 133
 134 test_expect_success ' context does not include other functions' '
 135         test $(grep -c "^[ +-].*Begin" extended.diff) -le 2
 136 '
 137
 138 test_expect_success ' context does not include preceding empty lines' '
 139         test "$(first_context_line <extended.diff)" != " "
 140 '
 141
 142 check_diff long_common_tail 'change with long common tail and no context' -U0
 143
 144 test_expect_success ' context includes begin' '
 145         grep "^ .*Begin of first part" long_common_tail.diff
 146 '
 147
 148 test_expect_failure ' context includes end' '
 149         grep "^ .*End of second part" long_common_tail.diff
 150 '
 151
 152 test_expect_success ' context does not include other functions' '
 153         test $(grep -c "^[ +-].*Begin" long_common_tail.diff) -le 2
 154 '
 155
 156 test_expect_success ' context does not include preceding empty lines' '
 157         test "$(first_context_line <long_common_tail.diff.diff)" != " "
 158 '
 159
 160 test_done