test_cmp expected actual
'
+test_expect_success 'only trailers' '
+ git config trailer.sign.command "echo config-value" &&
+ cat >expected <<-\EOF &&
+ existing: existing-value
+ sign: config-value
+ added: added-value
+ EOF
+ git interpret-trailers \
+ --trailer added:added-value \
+ --only-trailers >actual <<-\EOF &&
+ my subject
+
+ my body
+
+ existing: existing-value
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'only-trailers omits non-trailer in middle of block' '
+ git config trailer.sign.command "echo config-value" &&
+ cat >expected <<-\EOF &&
+ Signed-off-by: nobody <nobody@nowhere>
+ Signed-off-by: somebody <somebody@somewhere>
+ sign: config-value
+ EOF
+ git interpret-trailers --only-trailers >actual <<-\EOF &&
+ subject
+
+ it is important that the trailers below are signed-off-by
+ so that they meet the "25% trailers Git knows about" heuristic
+
+ Signed-off-by: nobody <nobody@nowhere>
+ this is not a trailer
+ Signed-off-by: somebody <somebody@somewhere>
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'only input' '
+ git config trailer.sign.command "echo config-value" &&
+ cat >expected <<-\EOF &&
+ existing: existing-value
+ EOF
+ git interpret-trailers \
+ --only-trailers --only-input >actual <<-\EOF &&
+ my subject
+
+ my body
+
+ existing: existing-value
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'unfold' '
+ cat >expected <<-\EOF &&
+ foo: continued across several lines
+ EOF
+ # pass through tr to make leading and trailing whitespace more obvious
+ tr _ " " <<-\EOF |
+ my subject
+
+ my body
+
+ foo:_
+ __continued
+ ___across
+ ____several
+ _____lines
+ ___
+ EOF
+ git interpret-trailers --only-trailers --only-input --unfold >actual &&
+ test_cmp expected actual
+'
+
+test_expect_success 'handling of --- lines in input' '
+ echo "real-trailer: just right" >expected &&
+
+ git interpret-trailers --parse >actual <<-\EOF &&
+ subject
+
+ body
+
+ not-a-trailer: too soon
+ ------ this is just a line in the commit message with a bunch of
+ ------ dashes; it does not have any syntactic meaning.
+
+ real-trailer: just right
+ ---
+ below the dashed line may be a patch, etc.
+
+ not-a-trailer: too late
+ EOF
+
+ test_cmp expected actual
+'
+
+test_expect_success 'suppress --- handling' '
+ echo "real-trailer: just right" >expected &&
+
+ git interpret-trailers --parse --no-divider >actual <<-\EOF &&
+ subject
+
+ This commit message has a "---" in it, but because we tell
+ interpret-trailers not to respect that, it has no effect.
+
+ not-a-trailer: too soon
+ ---
+
+ This is still the commit message body.
+
+ real-trailer: just right
+ EOF
+
+ test_cmp expected actual
+'
+
test_done