1 files changed, 609 insertions, 0 deletions
diff --git a/t/t7102-reset.sh b/t/t7102-reset.sh
new file mode 100755
index 0000000..22477f3
--- /dev/null
+++ b/t/t7102-reset.sh
@@ -0,0 +1,609 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Carlos Rica
+#
+
+test_description='git reset
+
+Documented tests for git reset'
+
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+. ./test-lib.sh
+
+commit_msg () {
+	# String "modify 2nd file (changed)" partly in German
+	# (translated with Google Translate),
+	# encoded in UTF-8, used as a commit log message below.
+	msg="modify 2nd file (ge\303\244ndert)\n"
+	if test -n "$1"
+	then
+		printf "$msg" | iconv -f utf-8 -t "$1"
+	else
+		printf "$msg"
+	fi
+}
+
+# Tested non-UTF-8 encoding
+test_encoding="ISO8859-1"
+
+test_expect_success 'creating initial files and commits' '
+	test_tick &&
+	echo "1st file" >first &&
+	git add first &&
+	git commit -m "create 1st file" &&
+
+	echo "2nd file" >second &&
+	git add second &&
+	git commit -m "create 2nd file" &&
+
+	echo "2nd line 1st file" >>first &&
+	git commit -a -m "modify 1st file" &&
+	head5p2=$(git rev-parse --verify HEAD) &&
+	head5p2f=$(git rev-parse --short HEAD:first) &&
+
+	git rm first &&
+	git mv second secondfile &&
+	git commit -a -m "remove 1st and rename 2nd" &&
+	head5p1=$(git rev-parse --verify HEAD) &&
+	head5p1s=$(git rev-parse --short HEAD:secondfile) &&
+
+	echo "1st line 2nd file" >secondfile &&
+	echo "2nd line 2nd file" >>secondfile &&
+	# "git commit -m" would break MinGW, as Windows refuse to pass
+	# $test_encoding encoded parameter to git.
+	commit_msg $test_encoding | git -c "i18n.commitEncoding=$test_encoding" commit -a -F - &&
+	head5=$(git rev-parse --verify HEAD) &&
+	head5s=$(git rev-parse --short HEAD:secondfile) &&
+	head5sl=$(git rev-parse HEAD:secondfile)
+'
+# git log --pretty=oneline # to see those SHA1 involved
+
+check_changes () {
+	test "$(git rev-parse HEAD)" = "$1" &&
+	git diff | test_cmp .diff_expect - &&
+	git diff --cached | test_cmp .cached_expect - &&
+	for FILE in *
+	do
+		echo $FILE':'
+		cat $FILE || return
+	done | test_cmp .cat_expect -
+}
+
+test_expect_success 'reset --hard message' '
+	hex=$(git log -1 --format="%h") &&
+	git reset --hard >.actual &&
+	echo HEAD is now at $hex $(commit_msg) >.expected &&
+	test_cmp .expected .actual
+'
+
+test_expect_success 'reset --hard message (ISO8859-1 logoutputencoding)' '
+	hex=$(git log -1 --format="%h") &&
+	git -c "i18n.logOutputEncoding=$test_encoding" reset --hard >.actual &&
+	echo HEAD is now at $hex $(commit_msg $test_encoding) >.expected &&
+	test_cmp .expected .actual
+'
+
+test_expect_success 'giving a non existing revision should fail' '
+	>.diff_expect &&
+	>.cached_expect &&
+	cat >.cat_expect <<-\EOF &&
+	secondfile:
+	1st line 2nd file
+	2nd line 2nd file
+	EOF
+
+	test_must_fail git reset aaaaaa &&
+	test_must_fail git reset --mixed aaaaaa &&
+	test_must_fail git reset --soft aaaaaa &&
+	test_must_fail git reset --hard aaaaaa &&
+	check_changes $head5
+'
+
+test_expect_success 'reset --soft with unmerged index should fail' '
+	touch .git/MERGE_HEAD &&
+	echo "100644 $head5sl 1	un" |
+		git update-index --index-info &&
+	test_must_fail git reset --soft HEAD &&
+	rm .git/MERGE_HEAD &&
+	git rm --cached -- un
+'
+
+test_expect_success 'giving paths with options different than --mixed should fail' '
+	test_must_fail git reset --soft -- first &&
+	test_must_fail git reset --hard -- first &&
+	test_must_fail git reset --soft HEAD^ -- first &&
+	test_must_fail git reset --hard HEAD^ -- first &&
+	check_changes $head5
+'
+
+test_expect_success 'giving unrecognized options should fail' '
+	test_must_fail git reset --other &&
+	test_must_fail git reset -o &&
+	test_must_fail git reset --mixed --other &&
+	test_must_fail git reset --mixed -o &&
+	test_must_fail git reset --soft --other &&
+	test_must_fail git reset --soft -o &&
+	test_must_fail git reset --hard --other &&
+	test_must_fail git reset --hard -o &&
+	check_changes $head5
+'
+
+test_expect_success 'trying to do reset --soft with pending merge should fail' '
+	git branch branch1 &&
+	git branch branch2 &&
+
+	git checkout branch1 &&
+	echo "3rd line in branch1" >>secondfile &&
+	git commit -a -m "change in branch1" &&
+
+	git checkout branch2 &&
+	echo "3rd line in branch2" >>secondfile &&
+	git commit -a -m "change in branch2" &&
+
+	test_must_fail git merge branch1 &&
+	test_must_fail git reset --soft &&
+
+	printf "1st line 2nd file\n2nd line 2nd file\n3rd line" >secondfile &&
+	git commit -a -m "the change in branch2" &&
+
+	git checkout main &&
+	git branch -D branch1 branch2 &&
+	check_changes $head5
+'
+
+test_expect_success 'trying to do reset --soft with pending checkout merge should fail' '
+	git branch branch3 &&
+	git branch branch4 &&
+
+	git checkout branch3 &&
+	echo "3rd line in branch3" >>secondfile &&
+	git commit -a -m "line in branch3" &&
+
+	git checkout branch4 &&
+	echo "3rd line in branch4" >>secondfile &&
+
+	git checkout -m branch3 &&
+	test_must_fail git reset --soft &&
+
+	printf "1st line 2nd file\n2nd line 2nd file\n3rd line" >secondfile &&
+	git commit -a -m "the line in branch3" &&
+
+	git checkout main &&
+	git branch -D branch3 branch4 &&
+	check_changes $head5
+'
+
+test_expect_success 'resetting to HEAD with no changes should succeed and do nothing' '
+	git reset --hard &&
+		check_changes $head5 &&
+	git reset --hard HEAD &&
+		check_changes $head5 &&
+	git reset --soft &&
+		check_changes $head5 &&
+	git reset --soft HEAD &&
+		check_changes $head5 &&
+	git reset --mixed &&
+		check_changes $head5 &&
+	git reset --mixed HEAD &&
+		check_changes $head5 &&
+	git reset &&
+		check_changes $head5 &&
+	git reset HEAD &&
+		check_changes $head5
+'
+
+test_expect_success '--soft reset only should show changes in diff --cached' '
+	>.diff_expect &&
+	cat >.cached_expect <<-EOF &&
+	diff --git a/secondfile b/secondfile
+	index $head5p1s..$head5s 100644
+	--- a/secondfile
+	+++ b/secondfile
+	@@ -1 +1,2 @@
+	-2nd file
+	+1st line 2nd file
+	+2nd line 2nd file
+	EOF
+	cat >.cat_expect <<-\EOF &&
+	secondfile:
+	1st line 2nd file
+	2nd line 2nd file
+	EOF
+	git reset --soft HEAD^ &&
+	check_changes $head5p1 &&
+	test "$(git rev-parse ORIG_HEAD)" = \
+			$head5
+'
+
+test_expect_success 'changing files and redo the last commit should succeed' '
+	>.diff_expect &&
+	>.cached_expect &&
+	cat >.cat_expect <<-\EOF &&
+	secondfile:
+	1st line 2nd file
+	2nd line 2nd file
+	3rd line 2nd file
+	EOF
+	echo "3rd line 2nd file" >>secondfile &&
+	git commit -a -C ORIG_HEAD &&
+	head4=$(git rev-parse --verify HEAD) &&
+	check_changes $head4 &&
+	test "$(git rev-parse ORIG_HEAD)" = \
+			$head5
+'
+
+test_expect_success '--hard reset should change the files and undo commits permanently' '
+	>.diff_expect &&
+	>.cached_expect &&
+	cat >.cat_expect <<-\EOF &&
+	first:
+	1st file
+	2nd line 1st file
+	second:
+	2nd file
+	EOF
+	git reset --hard HEAD~2 &&
+	check_changes $head5p2 &&
+	test "$(git rev-parse ORIG_HEAD)" = \
+			$head4
+'
+
+test_expect_success 'redoing changes adding them without commit them should succeed' '
+	>.diff_expect &&
+	cat >.cached_expect <<-EOF &&
+	diff --git a/first b/first
+	deleted file mode 100644
+	index $head5p2f..0000000
+	--- a/first
+	+++ /dev/null
+	@@ -1,2 +0,0 @@
+	-1st file
+	-2nd line 1st file
+	diff --git a/second b/second
+	deleted file mode 100644
+	index $head5p1s..0000000
+	--- a/second
+	+++ /dev/null
+	@@ -1 +0,0 @@
+	-2nd file
+	diff --git a/secondfile b/secondfile
+	new file mode 100644
+	index 0000000..$head5s
+	--- /dev/null
+	+++ b/secondfile
+	@@ -0,0 +1,2 @@
+	+1st line 2nd file
+	+2nd line 2nd file
+	EOF
+	cat >.cat_expect <<-\EOF &&
+	secondfile:
+	1st line 2nd file
+	2nd line 2nd file
+	EOF
+	git rm first &&
+	git mv second secondfile &&
+
+	echo "1st line 2nd file" >secondfile &&
+	echo "2nd line 2nd file" >>secondfile &&
+	git add secondfile &&
+	check_changes $head5p2
+'
+
+test_expect_success '--mixed reset to HEAD should unadd the files' '
+	cat >.diff_expect <<-EOF &&
+	diff --git a/first b/first
+	deleted file mode 100644
+	index $head5p2f..0000000
+	--- a/first
+	+++ /dev/null
+	@@ -1,2 +0,0 @@
+	-1st file
+	-2nd line 1st file
+	diff --git a/second b/second
+	deleted file mode 100644
+	index $head5p1s..0000000
+	--- a/second
+	+++ /dev/null
+	@@ -1 +0,0 @@
+	-2nd file
+	EOF
+	>.cached_expect &&
+	cat >.cat_expect <<-\EOF &&
+	secondfile:
+	1st line 2nd file
+	2nd line 2nd file
+	EOF
+	git reset &&
+	check_changes $head5p2 &&
+	test "$(git rev-parse ORIG_HEAD)" = $head5p2
+'
+
+test_expect_success 'redoing the last two commits should succeed' '
+	>.diff_expect &&
+	>.cached_expect &&
+	cat >.cat_expect <<-\EOF &&
+	secondfile:
+	1st line 2nd file
+	2nd line 2nd file
+	EOF
+	git add secondfile &&
+	git reset --hard $head5p2 &&
+	git rm first &&
+	git mv second secondfile &&
+	git commit -a -m "remove 1st and rename 2nd" &&
+
+	echo "1st line 2nd file" >secondfile &&
+	echo "2nd line 2nd file" >>secondfile &&
+	# "git commit -m" would break MinGW, as Windows refuse to pass
+	# $test_encoding encoded parameter to git.
+	commit_msg $test_encoding | git -c "i18n.commitEncoding=$test_encoding" commit -a -F - &&
+	check_changes $head5
+'
+
+test_expect_success '--hard reset to HEAD should clear a failed merge' '
+	>.diff_expect &&
+	>.cached_expect &&
+	cat >.cat_expect <<-\EOF &&
+	secondfile:
+	1st line 2nd file
+	2nd line 2nd file
+	3rd line in branch2
+	EOF
+	git branch branch1 &&
+	git branch branch2 &&
+
+	git checkout branch1 &&
+	echo "3rd line in branch1" >>secondfile &&
+	git commit -a -m "change in branch1" &&
+
+	git checkout branch2 &&
+	echo "3rd line in branch2" >>secondfile &&
+	git commit -a -m "change in branch2" &&
+	head3=$(git rev-parse --verify HEAD) &&
+
+	test_must_fail git pull . branch1 &&
+	git reset --hard &&
+	check_changes $head3
+'
+
+test_expect_success '--hard reset to ORIG_HEAD should clear a fast-forward merge' '
+	>.diff_expect &&
+	>.cached_expect &&
+	cat >.cat_expect <<-\EOF &&
+	secondfile:
+	1st line 2nd file
+	2nd line 2nd file
+	EOF
+	git reset --hard HEAD^ &&
+	check_changes $head5 &&
+
+	git pull . branch1 &&
+	git reset --hard ORIG_HEAD &&
+	check_changes $head5 &&
+
+	git checkout main &&
+	git branch -D branch1 branch2 &&
+	check_changes $head5
+'
+
+test_expect_success 'test --mixed <paths>' '
+	echo 1 >file1 &&
+	echo 2 >file2 &&
+	git add file1 file2 &&
+	test_tick &&
+	git commit -m files &&
+	before1=$(git rev-parse --short HEAD:file1) &&
+	before2=$(git rev-parse --short HEAD:file2) &&
+	git rm file2 &&
+	echo 3 >file3 &&
+	echo 4 >file4 &&
+	echo 5 >file1 &&
+	after1=$(git rev-parse --short $(git hash-object file1)) &&
+	after4=$(git rev-parse --short $(git hash-object file4)) &&
+	git add file1 file3 file4 &&
+	git reset HEAD -- file1 file2 file3 &&
+	test_must_fail git diff --quiet &&
+	git diff >output &&
+
+	cat >expect <<-EOF &&
+	diff --git a/file1 b/file1
+	index $before1..$after1 100644
+	--- a/file1
+	+++ b/file1
+	@@ -1 +1 @@
+	-1
+	+5
+	diff --git a/file2 b/file2
+	deleted file mode 100644
+	index $before2..0000000
+	--- a/file2
+	+++ /dev/null
+	@@ -1 +0,0 @@
+	-2
+	EOF
+
+	test_cmp expect output &&
+	git diff --cached >output &&
+
+	cat >cached_expect <<-EOF &&
+	diff --git a/file4 b/file4
+	new file mode 100644
+	index 0000000..$after4
+	--- /dev/null
+	+++ b/file4
+	@@ -0,0 +1 @@
+	+4
+	EOF
+
+	test_cmp cached_expect output
+'
+
+test_expect_success 'test resetting the index at give paths' '
+	mkdir sub &&
+	>sub/file1 &&
+	>sub/file2 &&
+	git update-index --add sub/file1 sub/file2 &&
+	T=$(git write-tree) &&
+	git reset HEAD sub/file2 &&
+	test_must_fail git diff --quiet &&
+	U=$(git write-tree) &&
+	echo "$T" &&
+	echo "$U" &&
+	test_must_fail git diff-index --cached --exit-code "$T" &&
+	test "$T" != "$U"
+'
+
+test_expect_success 'resetting an unmodified path is a no-op' '
+	git reset --hard &&
+	git reset -- file1 &&
+	git diff-files --exit-code &&
+	git diff-index --cached --exit-code HEAD
+'
+
+test_reset_refreshes_index () {
+
+	# To test whether the index is refreshed in `git reset --mixed` with
+	# the given options, create a scenario where we clearly see different
+	# results depending on whether the refresh occurred or not.
+
+	# Step 0: start with a clean index
+	git reset --hard HEAD &&
+
+	# Step 1: remove file2, but only in the index (no change to worktree)
+	git rm --cached file2 &&
+
+	# Step 2: reset index & leave worktree unchanged from HEAD
+	git $1 reset $2 --mixed HEAD &&
+
+	# Step 3: verify whether the index is refreshed by checking whether
+	# file2 still has staged changes in the index differing from HEAD (if
+	# the refresh occurred, there should be no such changes)
+	git diff-files >output.log &&
+	test_must_be_empty output.log
+}
+
+test_expect_success '--mixed refreshes the index' '
+	# Verify default behavior (without --[no-]refresh or reset.refresh)
+	test_reset_refreshes_index &&
+
+	# With --quiet
+	test_reset_refreshes_index "" --quiet
+'
+
+test_expect_success '--mixed --[no-]refresh sets refresh behavior' '
+	# Verify that --[no-]refresh controls index refresh
+	test_reset_refreshes_index "" --refresh &&
+	! test_reset_refreshes_index "" --no-refresh
+'
+
+test_expect_success '--mixed preserves skip-worktree' '
+	echo 123 >>file2 &&
+	git add file2 &&
+	git update-index --skip-worktree file2 &&
+	git reset --mixed HEAD >output &&
+	test_must_be_empty output &&
+
+	cat >expect <<-\EOF &&
+	Unstaged changes after reset:
+	M	file2
+	EOF
+	git update-index --no-skip-worktree file2 &&
+	git add file2 &&
+	git reset --mixed HEAD >output &&
+	test_cmp expect output
+'
+
+test_expect_success 'resetting specific path that is unmerged' '
+	git rm --cached file2 &&
+	F1=$(git rev-parse HEAD:file1) &&
+	F2=$(git rev-parse HEAD:file2) &&
+	F3=$(git rev-parse HEAD:secondfile) &&
+	{
+		echo "100644 $F1 1	file2" &&
+		echo "100644 $F2 2	file2" &&
+		echo "100644 $F3 3	file2"
+	} | git update-index --index-info &&
+	git ls-files -u &&
+	git reset HEAD file2 &&
+	test_must_fail git diff --quiet &&
+	git diff-index --exit-code --cached HEAD
+'
+
+test_expect_success 'disambiguation (1)' '
+	git reset --hard &&
+	>secondfile &&
+	git add secondfile &&
+	git reset secondfile &&
+	test_must_fail git diff --quiet -- secondfile &&
+	test -z "$(git diff --cached --name-only)" &&
+	test -f secondfile &&
+	test_must_be_empty secondfile
+'
+
+test_expect_success 'disambiguation (2)' '
+	git reset --hard &&
+	>secondfile &&
+	git add secondfile &&
+	rm -f secondfile &&
+	test_must_fail git reset secondfile &&
+	test -n "$(git diff --cached --name-only -- secondfile)" &&
+	test ! -f secondfile
+'
+
+test_expect_success 'disambiguation (3)' '
+	git reset --hard &&
+	>secondfile &&
+	git add secondfile &&
+	rm -f secondfile &&
+	git reset HEAD secondfile &&
+	test_must_fail git diff --quiet &&
+	test -z "$(git diff --cached --name-only)" &&
+	test ! -f secondfile
+'
+
+test_expect_success 'disambiguation (4)' '
+	git reset --hard &&
+	>secondfile &&
+	git add secondfile &&
+	rm -f secondfile &&
+	git reset -- secondfile &&
+	test_must_fail git diff --quiet &&
+	test -z "$(git diff --cached --name-only)" &&
+	test ! -f secondfile
+'
+
+test_expect_success 'reset with paths accepts tree' '
+	# for simpler tests, drop last commit containing added files
+	git reset --hard HEAD^ &&
+	git reset HEAD^^{tree} -- . &&
+	git diff --cached HEAD^ --exit-code &&
+	git diff HEAD --exit-code
+'
+
+test_expect_success 'reset -N keeps removed files as intent-to-add' '
+	echo new-file >new-file &&
+	git add new-file &&
+	git reset -N HEAD &&
+
+	tree=$(git write-tree) &&
+	git ls-tree $tree new-file >actual &&
+	test_must_be_empty actual &&
+
+	git diff --name-only >actual &&
+	echo new-file >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'reset --mixed sets up work tree' '
+	git init mixed_worktree &&
+	(
+		cd mixed_worktree &&
+		test_commit dummy
+	) &&
+	git --git-dir=mixed_worktree/.git --work-tree=mixed_worktree reset >actual &&
+	test_must_be_empty actual
+'
+
+test_done