1 files changed, 155 insertions, 0 deletions
diff --git a/t/t3705-add-sparse-checkout.sh b/t/t3705-add-sparse-checkout.sh
new file mode 100755
index 0000000000..2b1fd0d0ee
--- /dev/null
+++ b/t/t3705-add-sparse-checkout.sh
@@ -0,0 +1,155 @@
+#!/bin/sh
+
+test_description='git add in sparse checked out working trees'
+
+. ./test-lib.sh
+
+SPARSE_ENTRY_BLOB=""
+
+# Optionally take a printf format string to write to the sparse_entry file
+setup_sparse_entry () {
+	# 'sparse_entry' might already be in the index with the skip-worktree
+	# bit set. Remove it so that the subsequent git add can update it.
+	git update-index --force-remove sparse_entry &&
+	if test $# -eq 1
+	then
+		printf "$1" >sparse_entry
+	else
+		>sparse_entry
+	fi &&
+	git add sparse_entry &&
+	git update-index --skip-worktree sparse_entry &&
+	SPARSE_ENTRY_BLOB=$(git rev-parse :sparse_entry)
+}
+
+test_sparse_entry_unchanged () {
+	echo "100644 $SPARSE_ENTRY_BLOB 0	sparse_entry" >expected &&
+	git ls-files --stage sparse_entry >actual &&
+	test_cmp expected actual
+}
+
+setup_gitignore () {
+	test_when_finished rm -f .gitignore &&
+	cat >.gitignore <<-EOF
+	*
+	!/sparse_entry
+	EOF
+}
+
+test_expect_success 'setup' "
+	cat >sparse_error_header <<-EOF &&
+	The following pathspecs didn't match any eligible path, but they do match index
+	entries outside the current sparse checkout:
+	EOF
+
+	cat >sparse_hint <<-EOF &&
+	hint: Disable or modify the sparsity rules if you intend to update such entries.
+	hint: Disable this message with \"git config advice.updateSparsePath false\"
+	EOF
+
+	echo sparse_entry | cat sparse_error_header - >sparse_entry_error &&
+	cat sparse_entry_error sparse_hint >error_and_hint
+"
+
+test_expect_success 'git add does not remove sparse entries' '
+	setup_sparse_entry &&
+	rm sparse_entry &&
+	test_must_fail git add sparse_entry 2>stderr &&
+	test_cmp error_and_hint stderr &&
+	test_sparse_entry_unchanged
+'
+
+test_expect_success 'git add -A does not remove sparse entries' '
+	setup_sparse_entry &&
+	rm sparse_entry &&
+	setup_gitignore &&
+	git add -A 2>stderr &&
+	test_must_be_empty stderr &&
+	test_sparse_entry_unchanged
+'
+
+test_expect_success 'git add . does not remove sparse entries' '
+	setup_sparse_entry &&
+	rm sparse_entry &&
+	setup_gitignore &&
+	test_must_fail git add . 2>stderr &&
+
+	cat sparse_error_header >expect &&
+	echo . >>expect &&
+	cat sparse_hint >>expect &&
+
+	test_cmp expect stderr &&
+	test_sparse_entry_unchanged
+'
+
+for opt in "" -f -u --ignore-removal --dry-run
+do
+	test_expect_success "git add${opt:+ $opt} does not update sparse entries" '
+		setup_sparse_entry &&
+		echo modified >sparse_entry &&
+		test_must_fail git add $opt sparse_entry 2>stderr &&
+		test_cmp error_and_hint stderr &&
+		test_sparse_entry_unchanged
+	'
+done
+
+test_expect_success 'git add --refresh does not update sparse entries' '
+	setup_sparse_entry &&
+	git ls-files --debug sparse_entry | grep mtime >before &&
+	test-tool chmtime -60 sparse_entry &&
+	test_must_fail git add --refresh sparse_entry 2>stderr &&
+	test_cmp error_and_hint stderr &&
+	git ls-files --debug sparse_entry | grep mtime >after &&
+	test_cmp before after
+'
+
+test_expect_success 'git add --chmod does not update sparse entries' '
+	setup_sparse_entry &&
+	test_must_fail git add --chmod=+x sparse_entry 2>stderr &&
+	test_cmp error_and_hint stderr &&
+	test_sparse_entry_unchanged &&
+	! test -x sparse_entry
+'
+
+test_expect_success 'git add --renormalize does not update sparse entries' '
+	test_config core.autocrlf false &&
+	setup_sparse_entry "LINEONE\r\nLINETWO\r\n" &&
+	echo "sparse_entry text=auto" >.gitattributes &&
+	test_must_fail git add --renormalize sparse_entry 2>stderr &&
+	test_cmp error_and_hint stderr &&
+	test_sparse_entry_unchanged
+'
+
+test_expect_success 'git add --dry-run --ignore-missing warn on sparse path' '
+	setup_sparse_entry &&
+	rm sparse_entry &&
+	test_must_fail git add --dry-run --ignore-missing sparse_entry 2>stderr &&
+	test_cmp error_and_hint stderr &&
+	test_sparse_entry_unchanged
+'
+
+test_expect_success 'do not advice about sparse entries when they do not match the pathspec' '
+	setup_sparse_entry &&
+	test_must_fail git add nonexistent 2>stderr &&
+	grep "fatal: pathspec .nonexistent. did not match any files" stderr &&
+	! grep -F -f sparse_error_header stderr
+'
+
+test_expect_success 'do not warn when pathspec matches dense entries' '
+	setup_sparse_entry &&
+	echo modified >sparse_entry &&
+	>dense_entry &&
+	git add "*_entry" 2>stderr &&
+	test_must_be_empty stderr &&
+	test_sparse_entry_unchanged &&
+	git ls-files --error-unmatch dense_entry
+'
+
+test_expect_success 'add obeys advice.updateSparsePath' '
+	setup_sparse_entry &&
+	test_must_fail git -c advice.updateSparsePath=false add sparse_entry 2>stderr &&
+	test_cmp sparse_entry_error stderr
+
+'
+
+test_done