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Diffstat (limited to 'contrib/diff-highlight/t/t9400-diff-highlight.sh')
| -rwxr-xr-x | contrib/diff-highlight/t/t9400-diff-highlight.sh | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/contrib/diff-highlight/t/t9400-diff-highlight.sh b/contrib/diff-highlight/t/t9400-diff-highlight.sh new file mode 100755 index 0000000000..3b43dbed74 --- /dev/null +++ b/contrib/diff-highlight/t/t9400-diff-highlight.sh @@ -0,0 +1,296 @@ +#!/bin/sh + +test_description='Test diff-highlight' + +CURR_DIR=$(pwd) +TEST_OUTPUT_DIRECTORY=$(pwd) +TEST_DIRECTORY="$CURR_DIR"/../../../t +DIFF_HIGHLIGHT="$CURR_DIR"/../diff-highlight + +CW="$(printf "\033[7m")" # white +CR="$(printf "\033[27m")" # reset + +. "$TEST_DIRECTORY"/test-lib.sh + +if ! test_have_prereq PERL +then + skip_all='skipping diff-highlight tests; perl not available' + test_done +fi + +# dh_test is a test helper function which takes 3 file names as parameters. The +# first 2 files are used to generate diff and commit output, which is then +# piped through diff-highlight. The 3rd file should contain the expected output +# of diff-highlight (minus the diff/commit header, ie. everything after and +# including the first @@ line). +dh_test () { + a="$1" b="$2" && + + cat >patch.exp && + + { + cat "$a" >file && + git add file && + git commit -m "Add a file" && + + cat "$b" >file && + git diff file >diff.raw && + git commit -a -m "Update a file" && + git show >commit.raw + } >/dev/null && + + "$DIFF_HIGHLIGHT" <diff.raw | test_strip_patch_header >diff.act && + "$DIFF_HIGHLIGHT" <commit.raw | test_strip_patch_header >commit.act && + test_cmp patch.exp diff.act && + test_cmp patch.exp commit.act +} + +test_strip_patch_header () { + sed -n '/^@@/,$p' $* +} + +# dh_test_setup_history generates a contrived graph such that we have at least +# 1 nesting (E) and 2 nestings (F). +# +# A branch +# / +# D---E---F master +# +# git log --all --graph +# * commit +# | A +# | * commit +# | | F +# | * commit +# |/ +# | E +# * commit +# D +# +dh_test_setup_history () { + echo "file1" >file1 && + echo "file2" >file2 && + echo "file3" >file3 && + + cat file1 >file && + git add file && + git commit -m "D" && + + git checkout -b branch && + cat file2 >file && + git commit -a -m "A" && + + git checkout master && + cat file2 >file && + git commit -a -m "E" && + + cat file3 >file && + git commit -a -m "F" +} + +left_trim () { + "$PERL_PATH" -pe 's/^\s+//' +} + +trim_graph () { + # graphs start with * or | + # followed by a space or / or \ + "$PERL_PATH" -pe 's@^((\*|\|)( |/|\\))+@@' +} + +test_expect_success 'diff-highlight highlights the beginning of a line' ' + cat >a <<-\EOF && + aaa + bbb + ccc + EOF + + cat >b <<-\EOF && + aaa + 0bb + ccc + EOF + + dh_test a b <<-EOF + @@ -1,3 +1,3 @@ + aaa + -${CW}b${CR}bb + +${CW}0${CR}bb + ccc + EOF +' + +test_expect_success 'diff-highlight highlights the end of a line' ' + cat >a <<-\EOF && + aaa + bbb + ccc + EOF + + cat >b <<-\EOF && + aaa + bb0 + ccc + EOF + + dh_test a b <<-EOF + @@ -1,3 +1,3 @@ + aaa + -bb${CW}b${CR} + +bb${CW}0${CR} + ccc + EOF +' + +test_expect_success 'diff-highlight highlights the middle of a line' ' + cat >a <<-\EOF && + aaa + bbb + ccc + EOF + + cat >b <<-\EOF && + aaa + b0b + ccc + EOF + + dh_test a b <<-EOF + @@ -1,3 +1,3 @@ + aaa + -b${CW}b${CR}b + +b${CW}0${CR}b + ccc + EOF +' + +test_expect_success 'diff-highlight does not highlight whole line' ' + cat >a <<-\EOF && + aaa + bbb + ccc + EOF + + cat >b <<-\EOF && + aaa + 000 + ccc + EOF + + dh_test a b <<-EOF + @@ -1,3 +1,3 @@ + aaa + -bbb + +000 + ccc + EOF +' + +test_expect_failure 'diff-highlight highlights mismatched hunk size' ' + cat >a <<-\EOF && + aaa + bbb + EOF + + cat >b <<-\EOF && + aaa + b0b + ccc + EOF + + dh_test a b <<-EOF + @@ -1,3 +1,3 @@ + aaa + -b${CW}b${CR}b + +b${CW}0${CR}b + +ccc + EOF +' + +# These two code points share the same leading byte in UTF-8 representation; +# a naive byte-wise diff would highlight only the second byte. +# +# - U+00f3 ("o" with acute) +o_accent=$(printf '\303\263') +# - U+00f8 ("o" with stroke) +o_stroke=$(printf '\303\270') + +test_expect_success 'diff-highlight treats multibyte utf-8 as a unit' ' + echo "unic${o_accent}de" >a && + echo "unic${o_stroke}de" >b && + dh_test a b <<-EOF + @@ -1 +1 @@ + -unic${CW}${o_accent}${CR}de + +unic${CW}${o_stroke}${CR}de + EOF +' + +# Unlike the UTF-8 above, these are combining code points which are meant +# to modify the character preceding them: +# +# - U+0301 (combining acute accent) +combine_accent=$(printf '\314\201') +# - U+0302 (combining circumflex) +combine_circum=$(printf '\314\202') + +test_expect_failure 'diff-highlight treats combining code points as a unit' ' + echo "unico${combine_accent}de" >a && + echo "unico${combine_circum}de" >b && + dh_test a b <<-EOF + @@ -1 +1 @@ + -unic${CW}o${combine_accent}${CR}de + +unic${CW}o${combine_circum}${CR}de + EOF +' + +test_expect_success 'diff-highlight works with the --graph option' ' + dh_test_setup_history && + + # topo-order so that the order of the commits is the same as with --graph + # trim graph elements so we can do a diff + # trim leading space because our trim_graph is not perfect + git log --branches -p --topo-order | + "$DIFF_HIGHLIGHT" | left_trim >graph.exp && + git log --branches -p --graph | + "$DIFF_HIGHLIGHT" | trim_graph | left_trim >graph.act && + test_cmp graph.exp graph.act +' + +# Most combined diffs won't meet diff-highlight's line-number filter. So we +# create one here where one side drops a line and the other modifies it. That +# should result in a diff like: +# +# - modified content +# ++resolved content +# +# which naively looks like one side added "+resolved". +test_expect_success 'diff-highlight ignores combined diffs' ' + echo "content" >file && + git add file && + git commit -m base && + + >file && + git commit -am master && + + git checkout -b other HEAD^ && + echo "modified content" >file && + git commit -am other && + + test_must_fail git merge master && + echo "resolved content" >file && + git commit -am resolved && + + cat >expect <<-\EOF && + --- a/file + +++ b/file + @@@ -1,1 -1,0 +1,1 @@@ + - modified content + ++resolved content + EOF + + git show -c | "$DIFF_HIGHLIGHT" >actual.raw && + sed -n "/^---/,\$p" <actual.raw >actual && + test_cmp expect actual +' + +test_done |