test_cmp expect actual
'
+test_expect_success '--porcelain detects first non-blank line as subject' '
+ (
+ GIT_INDEX_FILE=.git/tmp-index &&
+ export GIT_INDEX_FILE &&
+ echo "This is it" >single-file &&
+ git add single-file &&
+ tree=$(git write-tree) &&
+ commit=$(printf "%s\n%s\n%s\n\n\n \noneline\n\nbody\n" \
+ "tree $tree" \
+ "author A <a@b.c> 123456789 +0000" \
+ "committer C <c@d.e> 123456789 +0000" |
+ git hash-object -w -t commit --stdin) &&
+ git blame --porcelain $commit -- single-file >output &&
+ grep "^summary oneline$" output
+ )
+'
+
test_done