topology tests: teach a helper to set author dates as well

Introduce on_dates helper that is similar to on_committer_date but
also sets the author date, not just the committer date.

At this step, just set the same timestamp to the author date as the
committer date, as no test looks at author date yet.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/lib-t6000.sh

@@ -82,6 +82,14 @@ on_committer_date () {
 	"$@"
 }
 
+on_dates () {
+	assign_fake_date GIT_COMMITTER_DATE "$1"
+	assign_fake_date GIT_AUTHOR_DATE "$2"
+	export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
+	shift 2
+	"$@"
+}
+
 # Execute a command and suppress any error output.
 hide_error () {
 	"$@" 2>/dev/null

t/t6003-rev-list-topo-order.sh

@@ -16,32 +16,32 @@ list_duplicates()
 date >path0
 git update-index --add path0
 save_tag tree git write-tree
-on_committer_date "00:00" hide_error save_tag root unique_commit root tree
-on_committer_date "00:01" save_tag l0 unique_commit l0 tree -p root
-on_committer_date "00:02" save_tag l1 unique_commit l1 tree -p l0
-on_committer_date "00:03" save_tag l2 unique_commit l2 tree -p l1
-on_committer_date "00:04" save_tag a0 unique_commit a0 tree -p l2
-on_committer_date "00:05" save_tag a1 unique_commit a1 tree -p a0
-on_committer_date "00:06" save_tag b1 unique_commit b1 tree -p a0
-on_committer_date "00:07" save_tag c1 unique_commit c1 tree -p b1
-on_committer_date "00:08" as_author foobar@example.com save_tag b2 unique_commit b2 tree -p b1
-on_committer_date "00:09" save_tag b3 unique_commit b3 tree -p b2
-on_committer_date "00:10" save_tag c2 unique_commit c2 tree -p c1 -p b2
-on_committer_date "00:11" save_tag c3 unique_commit c3 tree -p c2
-on_committer_date "00:12" save_tag a2 unique_commit a2 tree -p a1
-on_committer_date "00:13" save_tag a3 unique_commit a3 tree -p a2
-on_committer_date "00:14" save_tag b4 unique_commit b4 tree -p b3 -p a3
-on_committer_date "00:15" save_tag a4 unique_commit a4 tree -p a3 -p b4 -p c3
-on_committer_date "00:16" save_tag l3 unique_commit l3 tree -p a4
-on_committer_date "00:17" save_tag l4 unique_commit l4 tree -p l3
-on_committer_date "00:18" save_tag l5 unique_commit l5 tree -p l4
-on_committer_date "00:19" save_tag m1 unique_commit m1 tree -p a4 -p c3
-on_committer_date "00:20" save_tag m2 unique_commit m2 tree -p c3 -p a4
-on_committer_date "00:21" hide_error save_tag alt_root unique_commit alt_root tree
-on_committer_date "00:22" save_tag r0 unique_commit r0 tree -p alt_root
-on_committer_date "00:23" save_tag r1 unique_commit r1 tree -p r0
-on_committer_date "00:24" save_tag l5r1 unique_commit l5r1 tree -p l5 -p r1
-on_committer_date "00:25" save_tag r1l5 unique_commit r1l5 tree -p r1 -p l5
+on_dates "00:00" "00:00" hide_error save_tag root unique_commit root tree
+on_dates "00:01" "00:01" save_tag l0 unique_commit l0 tree -p root
+on_dates "00:02" "00:02" save_tag l1 unique_commit l1 tree -p l0
+on_dates "00:03" "00:03" save_tag l2 unique_commit l2 tree -p l1
+on_dates "00:04" "00:04" save_tag a0 unique_commit a0 tree -p l2
+on_dates "00:05" "00:05" save_tag a1 unique_commit a1 tree -p a0
+on_dates "00:06" "00:06" save_tag b1 unique_commit b1 tree -p a0
+on_dates "00:07" "00:07" save_tag c1 unique_commit c1 tree -p b1
+on_dates "00:08" "00:08" as_author foobar@example.com save_tag b2 unique_commit b2 tree -p b1
+on_dates "00:09" "00:09" save_tag b3 unique_commit b3 tree -p b2
+on_dates "00:10" "00:10" save_tag c2 unique_commit c2 tree -p c1 -p b2
+on_dates "00:11" "00:11" save_tag c3 unique_commit c3 tree -p c2
+on_dates "00:12" "00:12" save_tag a2 unique_commit a2 tree -p a1
+on_dates "00:13" "00:13" save_tag a3 unique_commit a3 tree -p a2
+on_dates "00:14" "00:14" save_tag b4 unique_commit b4 tree -p b3 -p a3
+on_dates "00:15" "00:15" save_tag a4 unique_commit a4 tree -p a3 -p b4 -p c3
+on_dates "00:16" "00:16" save_tag l3 unique_commit l3 tree -p a4
+on_dates "00:17" "00:17" save_tag l4 unique_commit l4 tree -p l3
+on_dates "00:18" "00:18" save_tag l5 unique_commit l5 tree -p l4
+on_dates "00:19" "00:19" save_tag m1 unique_commit m1 tree -p a4 -p c3
+on_dates "00:20" "00:20" save_tag m2 unique_commit m2 tree -p c3 -p a4
+on_dates "00:21" "00:21" hide_error save_tag alt_root unique_commit alt_root tree
+on_dates "00:22" "00:22" save_tag r0 unique_commit r0 tree -p alt_root
+on_dates "00:23" "00:23" save_tag r1 unique_commit r1 tree -p r0
+on_dates "00:24" "00:24" save_tag l5r1 unique_commit l5r1 tree -p l5 -p r1
+on_dates "00:25" "00:25" save_tag r1l5 unique_commit r1l5 tree -p r1 -p l5
 
 
 hide_error save_tag e1 as_author e@example.com unique_commit e1 tree