Andrew's git - gitweb.git/blob - contrib/diff-highlight/t/t9400-diff-highlight.sh

   1#!/bin/sh
   2
   3test_description='Test diff-highlight'
   4
   5CURR_DIR=$(pwd)
   6TEST_OUTPUT_DIRECTORY=$(pwd)
   7TEST_DIRECTORY="$CURR_DIR"/../../../t
   8DIFF_HIGHLIGHT="$CURR_DIR"/../diff-highlight
   9
  10CW="$(printf "\033[7m")"        # white
  11CR="$(printf "\033[27m")"       # reset
  12
  13. "$TEST_DIRECTORY"/test-lib.sh
  14
  15if ! test_have_prereq PERL
  16then
  17        skip_all='skipping diff-highlight tests; perl not available'
  18        test_done
  19fi
  20
  21# dh_test is a test helper function which takes 3 file names as parameters. The
  22# first 2 files are used to generate diff and commit output, which is then
  23# piped through diff-highlight. The 3rd file should contain the expected output
  24# of diff-highlight (minus the diff/commit header, ie. everything after and
  25# including the first @@ line).
  26dh_test () {
  27        a="$1" b="$2" &&
  28
  29        cat >patch.exp &&
  30
  31        {
  32                cat "$a" >file &&
  33                git add file &&
  34                git commit -m "Add a file" &&
  35
  36                cat "$b" >file &&
  37                git diff file >diff.raw &&
  38                git commit -a -m "Update a file" &&
  39                git show >commit.raw
  40        } >/dev/null &&
  41
  42        "$DIFF_HIGHLIGHT" <diff.raw | test_strip_patch_header >diff.act &&
  43        "$DIFF_HIGHLIGHT" <commit.raw | test_strip_patch_header >commit.act &&
  44        test_cmp patch.exp diff.act &&
  45        test_cmp patch.exp commit.act
  46}
  47
  48test_strip_patch_header () {
  49        sed -n '/^@@/,$p' $*
  50}
  51
  52# dh_test_setup_history generates a contrived graph such that we have at least
  53# 1 nesting (E) and 2 nestings (F).
  54#
  55#         A---B master
  56#        /
  57#       D---E---F branch
  58#
  59#       git log --all --graph
  60#       * commit
  61#       |    B
  62#       | * commit
  63#       | |    F
  64#       * | commit
  65#       | |    A
  66#       | * commit
  67#       |/
  68#       |    E
  69#       * commit
  70#            D
  71#
  72dh_test_setup_history () {
  73        echo file1 >file &&
  74        git add file &&
  75        test_tick &&
  76        git commit -m "D" &&
  77
  78        git checkout -b branch &&
  79        echo file2 >file &&
  80        test_tick &&
  81        git commit -a -m "E" &&
  82
  83        git checkout master &&
  84        echo file2 >file &&
  85        test_tick &&
  86        git commit -a -m "A" &&
  87
  88        git checkout branch &&
  89        echo file3 >file &&
  90        test_tick &&
  91        git commit -a -m "F" &&
  92
  93        git checkout master &&
  94        echo file3 >file &&
  95        test_tick &&
  96        git commit -a -m "B"
  97}
  98
  99left_trim () {
 100        "$PERL_PATH" -pe 's/^\s+//'
 101}
 102
 103trim_graph () {
 104        # graphs start with * or |
 105        # followed by a space or / or \
 106        "$PERL_PATH" -pe 's@^((\*|\|)( |/|\\))+@@'
 107}
 108
 109test_expect_success 'diff-highlight highlights the beginning of a line' '
 110        cat >a <<-\EOF &&
 111                aaa
 112                bbb
 113                ccc
 114        EOF
 115
 116        cat >b <<-\EOF &&
 117                aaa
 118                0bb
 119                ccc
 120        EOF
 121
 122        dh_test a b <<-EOF
 123                @@ -1,3 +1,3 @@
 124                 aaa
 125                -${CW}b${CR}bb
 126                +${CW}0${CR}bb
 127                 ccc
 128        EOF
 129'
 130
 131test_expect_success 'diff-highlight highlights the end of a line' '
 132        cat >a <<-\EOF &&
 133                aaa
 134                bbb
 135                ccc
 136        EOF
 137
 138        cat >b <<-\EOF &&
 139                aaa
 140                bb0
 141                ccc
 142        EOF
 143
 144        dh_test a b <<-EOF
 145                @@ -1,3 +1,3 @@
 146                 aaa
 147                -bb${CW}b${CR}
 148                +bb${CW}0${CR}
 149                 ccc
 150        EOF
 151'
 152
 153test_expect_success 'diff-highlight highlights the middle of a line' '
 154        cat >a <<-\EOF &&
 155                aaa
 156                bbb
 157                ccc
 158        EOF
 159
 160        cat >b <<-\EOF &&
 161                aaa
 162                b0b
 163                ccc
 164        EOF
 165
 166        dh_test a b <<-EOF
 167                @@ -1,3 +1,3 @@
 168                 aaa
 169                -b${CW}b${CR}b
 170                +b${CW}0${CR}b
 171                 ccc
 172        EOF
 173'
 174
 175test_expect_success 'diff-highlight does not highlight whole line' '
 176        cat >a <<-\EOF &&
 177                aaa
 178                bbb
 179                ccc
 180        EOF
 181
 182        cat >b <<-\EOF &&
 183                aaa
 184                000
 185                ccc
 186        EOF
 187
 188        dh_test a b <<-EOF
 189                @@ -1,3 +1,3 @@
 190                 aaa
 191                -bbb
 192                +000
 193                 ccc
 194        EOF
 195'
 196
 197test_expect_failure 'diff-highlight highlights mismatched hunk size' '
 198        cat >a <<-\EOF &&
 199                aaa
 200                bbb
 201        EOF
 202
 203        cat >b <<-\EOF &&
 204                aaa
 205                b0b
 206                ccc
 207        EOF
 208
 209        dh_test a b <<-EOF
 210                @@ -1,3 +1,3 @@
 211                 aaa
 212                -b${CW}b${CR}b
 213                +b${CW}0${CR}b
 214                +ccc
 215        EOF
 216'
 217
 218# These two code points share the same leading byte in UTF-8 representation;
 219# a naive byte-wise diff would highlight only the second byte.
 220#
 221#   - U+00f3 ("o" with acute)
 222o_accent=$(printf '\303\263')
 223#   - U+00f8 ("o" with stroke)
 224o_stroke=$(printf '\303\270')
 225
 226test_expect_success 'diff-highlight treats multibyte utf-8 as a unit' '
 227        echo "unic${o_accent}de" >a &&
 228        echo "unic${o_stroke}de" >b &&
 229        dh_test a b <<-EOF
 230                @@ -1 +1 @@
 231                -unic${CW}${o_accent}${CR}de
 232                +unic${CW}${o_stroke}${CR}de
 233        EOF
 234'
 235
 236# Unlike the UTF-8 above, these are combining code points which are meant
 237# to modify the character preceding them:
 238#
 239#   - U+0301 (combining acute accent)
 240combine_accent=$(printf '\314\201')
 241#   - U+0302 (combining circumflex)
 242combine_circum=$(printf '\314\202')
 243
 244test_expect_failure 'diff-highlight treats combining code points as a unit' '
 245        echo "unico${combine_accent}de" >a &&
 246        echo "unico${combine_circum}de" >b &&
 247        dh_test a b <<-EOF
 248                @@ -1 +1 @@
 249                -unic${CW}o${combine_accent}${CR}de
 250                +unic${CW}o${combine_circum}${CR}de
 251        EOF
 252'
 253
 254test_expect_success 'diff-highlight works with the --graph option' '
 255        dh_test_setup_history &&
 256
 257        # date-order so that the commits are interleaved for both
 258        # trim graph elements so we can do a diff
 259        # trim leading space because our trim_graph is not perfect
 260        git log --branches -p --date-order |
 261                "$DIFF_HIGHLIGHT" | left_trim >graph.exp &&
 262        git log --branches -p --date-order --graph |
 263                "$DIFF_HIGHLIGHT" | trim_graph | left_trim >graph.act &&
 264        test_cmp graph.exp graph.act
 265'
 266
 267# Most combined diffs won't meet diff-highlight's line-number filter. So we
 268# create one here where one side drops a line and the other modifies it. That
 269# should result in a diff like:
 270#
 271#    - modified content
 272#    ++resolved content
 273#
 274# which naively looks like one side added "+resolved".
 275test_expect_success 'diff-highlight ignores combined diffs' '
 276        echo "content" >file &&
 277        git add file &&
 278        git commit -m base &&
 279
 280        >file &&
 281        git commit -am master &&
 282
 283        git checkout -b other HEAD^ &&
 284        echo "modified content" >file &&
 285        git commit -am other &&
 286
 287        test_must_fail git merge master &&
 288        echo "resolved content" >file &&
 289        git commit -am resolved &&
 290
 291        cat >expect <<-\EOF &&
 292        --- a/file
 293        +++ b/file
 294        @@@ -1,1 -1,0 +1,1 @@@
 295        - modified content
 296        ++resolved content
 297        EOF
 298
 299        git show -c | "$DIFF_HIGHLIGHT" >actual.raw &&
 300        sed -n "/^---/,\$p" <actual.raw >actual &&
 301        test_cmp expect actual
 302'
 303
 304test_done