commit: drop duplicated parents

diff --git a/t/t3400-rebase.sh b/t/t3400-rebase.sh
index b9d3131cc2167df027d4d6eebc87ad51223c8f34..91bb5e1d9eea0b2f1ff7a1120d97ca2876a8f277 100755 (executable)
--- a/t/t3400-rebase.sh
+++ b/t/t3400-rebase.sh
@@ -9,26 +9,79 @@ This test runs git rebase and checks that the author information is not lost.
 '
 . ./test-lib.sh
 
-export GIT_AUTHOR_EMAIL=bogus_email_address
+GIT_AUTHOR_EMAIL=bogus_email_address
+export GIT_AUTHOR_EMAIL
 
 test_expect_success \
-    'prepare repository with topic branch, then rebase against master' \
+    'prepare repository with topic branches' \
     'echo First > A &&
-     git-update-index --add A &&
+     git update-index --add A &&
      git-commit -m "Add A." &&
      git checkout -b my-topic-branch &&
      echo Second > B &&
-     git-update-index --add B &&
+     git update-index --add B &&
      git-commit -m "Add B." &&
      git checkout -f master &&
      echo Third >> A &&
-     git-update-index A &&
+     git update-index A &&
      git-commit -m "Modify A." &&
+     git checkout -b side my-topic-branch &&
+     echo Side >> C &&
+     git add C &&
+     git commit -m "Add C" &&
+     git checkout -b nonlinear my-topic-branch &&
+     echo Edit >> B &&
+     git add B &&
+     git commit -m "Modify B" &&
+     git merge side &&
+     git checkout -b upstream-merged-nonlinear &&
+     git merge master &&
      git checkout -f my-topic-branch &&
+     git tag topic
+'
+
+test_expect_success 'rebase against master' '
      git rebase master'
 
-test_expect_failure \
+test_expect_success \
     'the rebase operation should not have destroyed author information' \
-    'git log | grep "Author:" | grep "<>"'
+    '! (git log | grep "Author:" | grep "<>")'
+
+test_expect_success 'rebase after merge master' '
+     git reset --hard topic &&
+     git merge master &&
+     git rebase master &&
+     ! (git show | grep "^Merge:")
+'
+
+test_expect_success 'rebase of history with merges is linearized' '
+     git checkout nonlinear &&
+     test 4 = $(git rev-list master.. | wc -l) &&
+     git rebase master &&
+     test 3 = $(git rev-list master.. | wc -l)
+'
+
+test_expect_success \
+    'rebase of history with merges after upstream merge is linearized' '
+     git checkout upstream-merged-nonlinear &&
+     test 5 = $(git rev-list master.. | wc -l) &&
+     git rebase master &&
+     test 3 = $(git rev-list master.. | wc -l)
+'
+
+test_expect_success 'rebase a single mode change' '
+     git checkout master &&
+     echo 1 > X &&
+     git add X &&
+     test_tick &&
+     git commit -m prepare &&
+     git checkout -b modechange HEAD^ &&
+     echo 1 > X &&
+     git add X &&
+     chmod a+x A &&
+     test_tick &&
+     git commit -m modechange A X &&
+     GIT_TRACE=1 git rebase master
+'
 
 test_done