merge-base-many: add trivial tests based on the documentation

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

diff --git a/t/t6010-merge-base.sh b/t/t6010-merge-base.sh
index b6e57b2426728cce308a57315247cd2a66cabf4a..04e4b7c5c2aa4f7c6922ebc5c9236962ab5d175c 100755 (executable)
--- a/t/t6010-merge-base.sh
+++ b/t/t6010-merge-base.sh
@@ -108,4 +108,52 @@ test_expect_success 'compute merge-base (all)' \
     'MB=$(git merge-base --all PL PR) &&
      expr "$(git name-rev "$MB")" : "[0-9a-f]* tags/C2"'
 
+# Another set to demonstrate base between one commit and a merge
+# in the documentation.
+
+test_expect_success 'merge-base for octopus-step (setup)' '
+       test_tick && git commit --allow-empty -m root && git tag MMR &&
+       test_tick && git commit --allow-empty -m 1 && git tag MM1 &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m A && git tag MMA &&
+       git checkout MM1 &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m B && git tag MMB &&
+       git checkout MMR &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m C && git tag MMC
+'
+
+test_expect_success 'merge-base A B C' '
+       MB=$(git merge-base --all MMA MMB MMC) &&
+       MM1=$(git rev-parse --verify MM1) &&
+       test "$MM1" = "$MB"
+'
+
+test_expect_success 'criss-cross merge-base for octopus-step (setup)' '
+       git reset --hard MMR &&
+       test_tick && git commit --allow-empty -m 1 && git tag CC1 &&
+       git reset --hard E &&
+       test_tick && git commit --allow-empty -m 2 && git tag CC2 &&
+       test_tick && git merge -s ours CC1 &&
+       test_tick && git commit --allow-empty -m o &&
+       test_tick && git commit --allow-empty -m B && git tag CCB &&
+       git reset --hard CC1 &&
+       test_tick && git merge -s ours CC2 &&
+       test_tick && git commit --allow-empty -m A && git tag CCA
+'
+
+test_expect_success 'merge-base B A^^ A^^2' '
+       MB0=$(git merge-base --all CCB CCA^^ CCA^^2 | sort) &&
+       MB1=$(git rev-parse CC1 CC2 | sort) &&
+       test "$MB0" = "$MB1"
+'
+
 test_done