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