! grep "Use .--" error
'
+test_expect_success 'format-patch --ignore-if-in-upstream HEAD' '
+ git format-patch --ignore-if-in-upstream HEAD
+'
+
+test_expect_success 'format-patch --signature' '
+ git format-patch --stdout --signature="my sig" -1 >output &&
+ grep "my sig" output
+'
+
+test_expect_success 'format-patch with format.signature config' '
+ git config format.signature "config sig" &&
+ git format-patch --stdout -1 >output &&
+ grep "config sig" output
+'
+
+test_expect_success 'format-patch --signature overrides format.signature' '
+ git config format.signature "config sig" &&
+ git format-patch --stdout --signature="overrides" -1 >output &&
+ ! grep "config sig" output &&
+ grep "overrides" output
+'
+
+test_expect_success 'format-patch --no-signature ignores format.signature' '
+ git config format.signature "config sig" &&
+ git format-patch --stdout --signature="my sig" --no-signature \
+ -1 >output &&
+ ! grep "config sig" output &&
+ ! grep "my sig" output &&
+ ! grep "^-- \$" output
+'
+
+test_expect_success 'format-patch --signature --cover-letter' '
+ git config --unset-all format.signature &&
+ git format-patch --stdout --signature="my sig" --cover-letter \
+ -1 >output &&
+ grep "my sig" output &&
+ test 2 = $(grep "my sig" output | wc -l)
+'
+
+test_expect_success 'format.signature="" supresses signatures' '
+ git config format.signature "" &&
+ git format-patch --stdout -1 >output &&
+ ! grep "^-- \$" output
+'
+
+test_expect_success 'format-patch --no-signature supresses signatures' '
+ git config --unset-all format.signature &&
+ git format-patch --stdout --no-signature -1 >output &&
+ ! grep "^-- \$" output
+'
+
+test_expect_success 'format-patch --signature="" supresses signatures' '
+ git format-patch --signature="" -1 >output &&
+ ! grep "^-- \$" output
+'
+
test_done