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#!/bin/sh

test_description='add -i basic tests'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-terminal.sh

if ! test_have_prereq PERL
then
	skip_all='skipping add -i tests, perl not available'
	test_done
fi

diff_cmp () {
	for x
	do
		sed  -e '/^index/s/[0-9a-f]*[1-9a-f][0-9a-f]*\.\./1234567../' \
		     -e '/^index/s/\.\.[0-9a-f]*[1-9a-f][0-9a-f]*/..9abcdef/' \
		     -e '/^index/s/ 00*\.\./ 0000000../' \
		     -e '/^index/s/\.\.00*$/..0000000/' \
		     -e '/^index/s/\.\.00* /..0000000 /' \
		     "$x" >"$x.filtered"
	done
	test_cmp "$1.filtered" "$2.filtered"
}

test_expect_success 'setup (initial)' '
	echo content >file &&
	git add file &&
	echo more >>file &&
	echo lines >>file
'
test_expect_success 'status works (initial)' '
	git add -i </dev/null >output &&
	grep "+1/-0 *+2/-0 file" output
'

test_expect_success 'setup expected' '
	cat >expected <<-\EOF
	new file mode 100644
	index 0000000..d95f3ad
	--- /dev/null
	+++ b/file
	@@ -0,0 +1 @@
	+content
	EOF
'

test_expect_success 'diff works (initial)' '
	(echo d; echo 1) | git add -i >output &&
	sed -ne "/new file/,/content/p" <output >diff &&
	diff_cmp expected diff
'
test_expect_success 'revert works (initial)' '
	git add file &&
	(echo r; echo 1) | git add -i &&
	git ls-files >output &&
	! grep . output
'

test_expect_success 'setup (commit)' '
	echo baseline >file &&
	git add file &&
	git commit -m commit &&
	echo content >>file &&
	git add file &&
	echo more >>file &&
	echo lines >>file
'
test_expect_success 'status works (commit)' '
	git add -i </dev/null >output &&
	grep "+1/-0 *+2/-0 file" output
'

test_expect_success 'setup expected' '
	cat >expected <<-\EOF
	index 180b47c..b6f2c08 100644
	--- a/file
	+++ b/file
	@@ -1 +1,2 @@
	 baseline
	+content
	EOF
'

test_expect_success 'diff works (commit)' '
	(echo d; echo 1) | git add -i >output &&
	sed -ne "/^index/,/content/p" <output >diff &&
	diff_cmp expected diff
'
test_expect_success 'revert works (commit)' '
	git add file &&
	(echo r; echo 1) | git add -i &&
	git add -i </dev/null >output &&
	grep "unchanged *+3/-0 file" output
'


test_expect_success 'setup expected' '
	cat >expected <<-\EOF
	EOF
'

test_expect_success 'dummy edit works' '
	test_set_editor : &&
	(echo e; echo a) | git add -p &&
	git diff > diff &&
	diff_cmp expected diff
'

test_expect_success 'setup patch' '
	cat >patch <<-\EOF
	@@ -1,1 +1,4 @@
	 this
	+patch
	-does not
	 apply
	EOF
'

test_expect_success 'setup fake editor' '
	write_script "fake_editor.sh" <<-\EOF &&
	mv -f "$1" oldpatch &&
	mv -f patch "$1"
	EOF
	test_set_editor "$(pwd)/fake_editor.sh"
'

test_expect_success 'bad edit rejected' '
	git reset &&
	(echo e; echo n; echo d) | git add -p >output &&
	grep "hunk does not apply" output
'

test_expect_success 'setup patch' '
	cat >patch <<-\EOF
	this patch
	is garbage
	EOF
'

test_expect_success 'garbage edit rejected' '
	git reset &&
	(echo e; echo n; echo d) | git add -p >output &&
	grep "hunk does not apply" output
'

test_expect_success 'setup patch' '
	cat >patch <<-\EOF
	@@ -1,0 +1,0 @@
	 baseline
	+content
	+newcontent
	+lines
	EOF
'

test_expect_success 'setup expected' '
	cat >expected <<-\EOF
	diff --git a/file b/file
	index b5dd6c9..f910ae9 100644
	--- a/file
	+++ b/file
	@@ -1,4 +1,4 @@
	 baseline
	 content
	-newcontent
	+more
	 lines
	EOF
'

test_expect_success 'real edit works' '
	(echo e; echo n; echo d) | git add -p &&
	git diff >output &&
	diff_cmp expected output
'

test_expect_success 'setup file' '
	test_write_lines a "" b "" c >file &&
	git add file &&
	test_write_lines a "" d "" c >file
'

test_expect_success 'setup patch' '
	SP=" " &&
	NULL="" &&
	cat >patch <<-EOF
	@@ -1,4 +1,4 @@
	 a
	$NULL
	-b
	+f
	$SP
	c
	EOF
'

test_expect_success 'setup expected' '
	cat >expected <<-EOF
	diff --git a/file b/file
	index b5dd6c9..f910ae9 100644
	--- a/file
	+++ b/file
	@@ -1,5 +1,5 @@
	 a
	$SP
	-f
	+d
	$SP
	 c
	EOF
'

test_expect_success 'edit can strip spaces from empty context lines' '
	test_write_lines e n q | git add -p 2>error &&
	test_must_be_empty error &&
	git diff >output &&
	diff_cmp expected output
'

test_expect_success 'skip files similarly as commit -a' '
	git reset &&
	echo file >.gitignore &&
	echo changed >file &&
	echo y | git add -p file &&
	git diff >output &&
	git reset &&
	git commit -am commit &&
	git diff >expected &&
	diff_cmp expected output &&
	git reset --hard HEAD^
'
rm -f .gitignore

test_expect_success FILEMODE 'patch does not affect mode' '
	git reset --hard &&
	echo content >>file &&
	chmod +x file &&
	printf "n\\ny\\n" | git add -p &&
	git show :file | grep content &&
	git diff file | grep "new mode"
'

test_expect_success FILEMODE 'stage mode but not hunk' '
	git reset --hard &&
	echo content >>file &&
	chmod +x file &&
	printf "y\\nn\\n" | git add -p &&
	git diff --cached file | grep "new mode" &&
	git diff          file | grep "+content"
'


test_expect_success FILEMODE 'stage mode and hunk' '
	git reset --hard &&
	echo content >>file &&
	chmod +x file &&
	printf "y\\ny\\n" | git add -p &&
	git diff --cached file | grep "new mode" &&
	git diff --cached file | grep "+content" &&
	test -z "$(git diff file)"
'

# end of tests disabled when filemode is not usable

test_expect_success 'setup again' '
	git reset --hard &&
	test_chmod +x file &&
	echo content >>file
'

# Write the patch file with a new line at the top and bottom
test_expect_success 'setup patch' '
	cat >patch <<-\EOF
	index 180b47c..b6f2c08 100644
	--- a/file
	+++ b/file
	@@ -1,2 +1,4 @@
	+firstline
	 baseline
	 content
	+lastline
	\ No newline at end of file
	EOF
'

# Expected output, diff is similar to the patch but w/ diff at the top
test_expect_success 'setup expected' '
	echo diff --git a/file b/file >expected &&
	cat patch |sed "/^index/s/ 100644/ 100755/" >>expected &&
	cat >expected-output <<-\EOF
	--- a/file
	+++ b/file
	@@ -1,2 +1,4 @@
	+firstline
	 baseline
	 content
	+lastline
	\ No newline at end of file
	@@ -1,2 +1,3 @@
	+firstline
	 baseline
	 content
	@@ -1,2 +2,3 @@
	 baseline
	 content
	+lastline
	\ No newline at end of file
	EOF
'

# Test splitting the first patch, then adding both
test_expect_success C_LOCALE_OUTPUT 'add first line works' '
	git commit -am "clear local changes" &&
	git apply patch &&
	printf "%s\n" s y y | git add -p file 2>error |
		sed -n -e "s/^Stage this hunk[^@]*\(@@ .*\)/\1/" \
		       -e "/^[-+@ \\\\]"/p  >output &&
	test_must_be_empty error &&
	git diff --cached >diff &&
	diff_cmp expected diff &&
	test_cmp expected-output output