#!/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' $*
}
# dh_test_setup_history generates a contrived graph such that we have at least
# 1 nesting (E) and 2 nestings (F).
#
# A---B master
# /
# D---E---F branch
#
# git log --all --graph
# * commit
# | B
# | * commit
# | | F
# * | commit
# | | A
# | * commit
# |/
# | E
# * commit
# D
#
dh_test_setup_history () {
echo file1 >file &&
git add file &&
test_tick &&
git commit -m "D" &&
git checkout -b branch &&
echo file2 >file &&
test_tick &&
git commit -a -m "E" &&
git checkout master &&
echo file2 >file &&
test_tick &&
git commit -a -m "A" &&
git checkout branch &&
echo file3 >file &&
test_tick &&
git commit -a -m "F" &&
git checkout master &&
echo file3 >file &&
test_tick &&
git commit -a -m "B"
}
left_trim () {
"$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}${CR}de
EOF
'
test_expect_success 'diff-highlight works with the --graph option' '
dh_test_setup_history &&
# date-order so that the commits are interleaved for both
# trim graph elements so we can do a diff
# trim leading space because our trim_graph is not perfect
git log --branches -p --date-order |
"$DIFF_HIGHLIGHT" | left_trim >graph.exp &&
git log --branches -p --date-order --graph |
"$DIFF_HIGHLIGHT" | trim_graph | left_trim >graph.act &&
test_cmp graph.exp graph.act
'
# Just reuse the previous graph test, but with --color. Our trimming
# doesn't know about color, so just sanity check that something got
# highlighted.
test_expect_success 'diff-highlight works with color graph' '
git log --branches -p --date-order --graph --color |
"$DIFF_HIGHLIGHT" | trim_graph | left_trim >graph &&
grep "\[7m" graph
'
# 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_expect_success 'diff-highlight handles --graph with leading dash' '
cat >file <<-\EOF &&
before
the old line
-leading dash
EOF
git add file &&
git commit -m before &&
sed s/old/new/ <file >file.tmp &&
mv file.tmp file &&
git add file &&
git commit -m after &&
cat >expect <<-EOF &&
--- a/file
+++ b/file
@@ -1,3 +1,3 @@
before
-the ${CW}old${CR} line
+the ${CW}new${CR} line
-leading dash
EOF
git log --graph -p -1 | "$DIFF_HIGHLIGHT" >actual.raw &&
trim_graph <actual.raw | sed -n "/^---/,\$p" >actual &&
test_cmp expect actual
'
test_done
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