add: error appropriately on repository with no commits

diff --git a/t/t6012-rev-list-simplify.sh b/t/t6012-rev-list-simplify.sh
index b5a1190ffe63b53d8b637b39a15d3d94b3efa6cd..a10f0df02b0ec8acdcaf7c90d02da4a9c20ffb1b 100755 (executable)
--- a/t/t6012-rev-list-simplify.sh
+++ b/t/t6012-rev-list-simplify.sh
@@ -12,6 +12,22 @@ unnote () {
        git name-rev --tags --stdin | sed -e "s|$OID_REGEX (tags/\([^)]*\)) |\1 |g"
 }
 
+#
+# Create a test repo with interesting commit graph:
+#
+# A--B----------G--H--I--K--L
+#  \  \           /     /
+#   \  \         /     /
+#    C------E---F     J
+#        \_/
+#
+# The commits are laid out from left-to-right starting with
+# the root commit A and terminating at the tip commit L.
+#
+# There are a few places where we adjust the commit date or
+# author date to make the --topo-order, --date-order, and
+# --author-date-order flags produce different output.
+
 test_expect_success setup '
        echo "Hi there" >file &&
        echo "initial" >lost &&
@@ -21,10 +37,18 @@ test_expect_success setup '
 
        git branch other-branch &&
 
+       git symbolic-ref HEAD refs/heads/unrelated &&
+       git rm -f "*" &&
+       echo "Unrelated branch" >side &&
+       git add side &&
+       test_tick && git commit -m "Side root" &&
+       note J &&
+       git checkout master &&
+
        echo "Hello" >file &&
        echo "second" >lost &&
        git add file lost &&
-       test_tick && git commit -m "Modified file and lost" &&
+       test_tick && GIT_AUTHOR_DATE=$(($test_tick + 120)) git commit -m "Modified file and lost" &&
        note B &&
 
        git checkout other-branch &&
@@ -63,13 +87,6 @@ test_expect_success setup '
        test_tick && git commit -a -m "Final change" &&
        note I &&
 
-       git symbolic-ref HEAD refs/heads/unrelated &&
-       git rm -f "*" &&
-       echo "Unrelated branch" >side &&
-       git add side &&
-       test_tick && git commit -m "Side root" &&
-       note J &&
-
        git checkout master &&
        test_tick && git merge --allow-unrelated-histories -m "Coolest" unrelated &&
        note K &&
@@ -103,14 +120,24 @@ check_result () {
        check_outcome success "$@"
 }
 
-check_result 'L K J I H G F E D C B A' --full-history
+check_result 'L K J I H F E D C G B A' --full-history --topo-order
+check_result 'L K I H G F E D C B J A' --full-history
+check_result 'L K I H G F E D C B J A' --full-history --date-order
+check_result 'L K I H G F E D B C J A' --full-history --author-date-order
 check_result 'K I H E C B A' --full-history -- file
 check_result 'K I H E C B A' --full-history --topo-order -- file
 check_result 'K I H E C B A' --full-history --date-order -- file
+check_result 'K I H E B C A' --full-history --author-date-order -- file
 check_result 'I E C B A' --simplify-merges -- file
+check_result 'I E C B A' --simplify-merges --topo-order -- file
+check_result 'I E C B A' --simplify-merges --date-order -- file
+check_result 'I E B C A' --simplify-merges --author-date-order -- file
 check_result 'I B A' -- file
 check_result 'I B A' --topo-order -- file
+check_result 'I B A' --date-order -- file
+check_result 'I B A' --author-date-order -- file
 check_result 'H' --first-parent -- another-file
+check_result 'H' --first-parent --topo-order -- another-file
 
 check_result 'E C B A' --full-history E -- lost
 test_expect_success 'full history simplification without parent' '