format-patch: allow --range-diff to apply to a lone-patch

diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
index 2237c7f4af9464cbee087696ec3a86aeaa86e033..3d7a2d8a4d8191f93a70b2e3d4878537cd2c5564 100755 (executable)
--- a/t/t3206-range-diff.sh
+++ b/t/t3206-range-diff.sh
@@ -142,4 +142,16 @@ test_expect_success 'changed message' '
        test_cmp expected actual
 '
 
+for prev in topic master..topic
+do
+       test_expect_success "format-patch --range-diff=$prev" '
+               git format-patch --stdout --cover-letter --range-diff=$prev \
+                       master..unmodified >actual &&
+               grep "= 1: .* s/5/A" actual &&
+               grep "= 2: .* s/4/A" actual &&
+               grep "= 3: .* s/11/B" actual &&
+               grep "= 4: .* s/12/B" actual
+       '
+done
+
 test_done