Andrew's git / gitweb.git / t/t4051-diff-function-context.sh
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t / t4051-diff-function-context.shon commit t1512: skip test if not using SHA-1 (d7a2fc8)
   1#!/bin/sh
   2
   3test_description='diff function context'
   4
   5. ./test-lib.sh
   6
   7dir="$TEST_DIRECTORY/t4051"
   8
   9commit_and_tag () {
  10        tag=$1 &&
  11        shift &&
  12        git add "$@" &&
  13        test_tick &&
  14        git commit -m "$tag" &&
  15        git tag "$tag"
  16}
  17
  18first_context_line () {
  19        awk '
  20                found {print; exit}
  21                /^@@/ {found = 1}
  22        '
  23}
  24
  25last_context_line () {
  26        sed -ne \$p
  27}
  28
  29check_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 "$name"
  43        '
  44}
  45
  46test_expect_success 'setup' '
  47        cat "$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 "$dir/appended2.c" >>file.c &&
  63        commit_and_tag extended file.c &&
  64
  65        grep -v "Begin of second part" <file.c >file.c.new &&
  66        mv file.c.new file.c &&
  67        commit_and_tag long_common_tail file.c &&
  68
  69        git checkout initial &&
  70        cat "$dir/hello.c" "$dir/dummy.c" >file.c &&
  71        commit_and_tag hello_dummy file.c &&
  72
  73        # overlap function context of 1st change and -u context of 2nd change
  74        grep -v "delete me from hello" <"$dir/hello.c" >file.c &&
  75        sed "2a\\
  76             extra line" <"$dir/dummy.c" >>file.c &&
  77        commit_and_tag changed_hello_dummy file.c &&
  78
  79        git checkout initial &&
  80        grep -v "delete me from hello" <file.c >file.c.new &&
  81        mv file.c.new file.c &&
  82        cat "$dir/appended1.c" >>file.c &&
  83        commit_and_tag changed_hello_appended file.c
  84'
  85
  86check_diff changed_hello 'changed function'
  87
  88test_expect_success ' context includes comment' '
  89        grep "^ .*Hello comment" changed_hello.diff
  90'
  91
  92test_expect_success ' context includes begin' '
  93        grep "^ .*Begin of hello" changed_hello.diff
  94'
  95
  96test_expect_success ' context includes end' '
  97        grep "^ .*End of hello" changed_hello.diff
  98'
  99
 100test_expect_success ' context does not include other functions' '
 101        test $(grep -c "^[ +-].*Begin" changed_hello.diff) -le 1
 102'
 103
 104test_expect_success ' context does not include preceding empty lines' '
 105        test "$(first_context_line <changed_hello.diff)" != " "
 106'
 107
 108test_expect_success ' context does not include trailing empty lines' '
 109        test "$(last_context_line <changed_hello.diff)" != " "
 110'
 111
 112check_diff changed_includes 'changed includes'
 113
 114test_expect_success ' context includes begin' '
 115        grep "^ .*Begin.h" changed_includes.diff
 116'
 117
 118test_expect_success ' context includes end' '
 119        grep "^ .*End.h" changed_includes.diff
 120'
 121
 122test_expect_success ' context does not include other functions' '
 123        test $(grep -c "^[ +-].*Begin" changed_includes.diff) -le 1
 124'
 125
 126test_expect_success ' context does not include trailing empty lines' '
 127        test "$(last_context_line <changed_includes.diff)" != " "
 128'
 129
 130check_diff appended 'appended function'
 131
 132test_expect_success ' context includes begin' '
 133        grep "^[+].*Begin of first part" appended.diff
 134'
 135
 136test_expect_success ' context includes end' '
 137        grep "^[+].*End of first part" appended.diff
 138'
 139
 140test_expect_success ' context does not include other functions' '
 141        test $(grep -c "^[ +-].*Begin" appended.diff) -le 1
 142'
 143
 144check_diff extended 'appended function part'
 145
 146test_expect_success ' context includes begin' '
 147        grep "^ .*Begin of first part" extended.diff
 148'
 149
 150test_expect_success ' context includes end' '
 151        grep "^[+].*End of second part" extended.diff
 152'
 153
 154test_expect_success ' context does not include other functions' '
 155        test $(grep -c "^[ +-].*Begin" extended.diff) -le 2
 156'
 157
 158test_expect_success ' context does not include preceding empty lines' '
 159        test "$(first_context_line <extended.diff)" != " "
 160'
 161
 162check_diff long_common_tail 'change with long common tail and no context' -U0
 163
 164test_expect_success ' context includes begin' '
 165        grep "^ .*Begin of first part" long_common_tail.diff
 166'
 167
 168test_expect_success ' context includes end' '
 169        grep "^ .*End of second part" long_common_tail.diff
 170'
 171
 172test_expect_success ' context does not include other functions' '
 173        test $(grep -c "^[ +-].*Begin" long_common_tail.diff) -le 2
 174'
 175
 176test_expect_success ' context does not include preceding empty lines' '
 177        test "$(first_context_line <long_common_tail.diff.diff)" != " "
 178'
 179
 180check_diff changed_hello_appended 'changed function plus appended function'
 181
 182test_expect_success ' context includes begin' '
 183        grep "^ .*Begin of hello" changed_hello_appended.diff &&
 184        grep "^[+].*Begin of first part" changed_hello_appended.diff
 185'
 186
 187test_expect_success ' context includes end' '
 188        grep "^ .*End of hello" changed_hello_appended.diff &&
 189        grep "^[+].*End of first part" changed_hello_appended.diff
 190'
 191
 192test_expect_success ' context does not include other functions' '
 193        test $(grep -c "^[ +-].*Begin" changed_hello_appended.diff) -le 2
 194'
 195
 196check_diff changed_hello_dummy 'changed two consecutive functions'
 197
 198test_expect_success ' context includes begin' '
 199        grep "^ .*Begin of hello" changed_hello_dummy.diff &&
 200        grep "^ .*Begin of dummy" changed_hello_dummy.diff
 201'
 202
 203test_expect_success ' context includes end' '
 204        grep "^ .*End of hello" changed_hello_dummy.diff &&
 205        grep "^ .*End of dummy" changed_hello_dummy.diff
 206'
 207
 208test_expect_success ' overlapping hunks are merged' '
 209        test $(grep -c "^@@" changed_hello_dummy.diff) -eq 1
 210'
 211
 212test_done