test_cmp expect output
'
+test_expect_success 'disambiguation (1)' '
+
+ git reset --hard &&
+ >secondfile &&
+ git add secondfile &&
+ test_must_fail git reset secondfile &&
+ test -z "$(git diff --cached --name-only)" &&
+ test -f secondfile &&
+ test ! -s secondfile
+
+'
+
+test_expect_success 'disambiguation (2)' '
+
+ git reset --hard &&
+ >secondfile &&
+ git add secondfile &&
+ rm -f secondfile &&
+ test_must_fail git reset secondfile &&
+ test -n "$(git diff --cached --name-only -- secondfile)" &&
+ test ! -f secondfile
+
+'
+
+test_expect_success 'disambiguation (3)' '
+
+ git reset --hard &&
+ >secondfile &&
+ git add secondfile &&
+ rm -f secondfile &&
+ test_must_fail git reset HEAD secondfile &&
+ test -z "$(git diff --cached --name-only)" &&
+ test ! -f secondfile
+
+'
+
+test_expect_success 'disambiguation (4)' '
+
+ git reset --hard &&
+ >secondfile &&
+ git add secondfile &&
+ rm -f secondfile &&
+ test_must_fail git reset -- secondfile &&
+ test -z "$(git diff --cached --name-only)" &&
+ test ! -f secondfile
+'
+
test_done