grep "unchanged *+3/-0 file" output
'
+cat >expected <<EOF
+EOF
+cat >fake_editor.sh <<EOF
+EOF
+chmod a+x fake_editor.sh
+test_set_editor "$(pwd)/fake_editor.sh"
+test_expect_success 'dummy edit works' '
+ (echo e; echo a) | git add -p &&
+ git diff > diff &&
+ test_cmp expected diff
+'
+
+cat >patch <<EOF
+@@ -1,1 +1,4 @@
+ this
++patch
+-doesn't
+ apply
+EOF
+echo "#!$SHELL_PATH" >fake_editor.sh
+cat >>fake_editor.sh <<\EOF
+mv -f "$1" oldpatch &&
+mv -f patch "$1"
+EOF
+chmod a+x fake_editor.sh
+test_set_editor "$(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
+'
+
+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
+'
+
+cat >patch <<EOF
+@@ -1,0 +1,0 @@
+ baseline
++content
++newcontent
++lines
+EOF
+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 &&
+ test_cmp expected output
+'
+
+if test "$(git config --bool core.filemode)" = false
+then
+ say 'skipping filemode tests (filesystem does not properly support modes)'
+else
+
+test_expect_success '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 '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"
+'
+
+fi
+# end of tests disabled when filemode is not usable
+
test_done