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Diffstat (limited to 't/t7609-merge-abort.sh')
| -rwxr-xr-x | t/t7609-merge-abort.sh | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/t/t7609-merge-abort.sh b/t/t7609-merge-abort.sh new file mode 100755 index 0000000000..61890bc892 --- /dev/null +++ b/t/t7609-merge-abort.sh @@ -0,0 +1,313 @@ +#!/bin/sh + +test_description='test aborting in-progress merges + +Set up repo with conflicting and non-conflicting branches: + +There are three files foo/bar/baz, and the following graph illustrates the +content of these files in each commit: + +# foo/bar/baz --- foo/bar/bazz <-- master +# \ +# --- foo/barf/bazf <-- conflict_branch +# \ +# --- foo/bart/baz <-- clean_branch + +Next, test git merge --abort with the following variables: +- before/after successful merge (should fail when not in merge context) +- with/without conflicts +- clean/dirty index before merge +- clean/dirty worktree before merge +- dirty index before merge matches contents on remote branch +- changed/unchanged worktree after merge +- changed/unchanged index after merge +' +. ./test-lib.sh + +test_expect_success 'setup' ' + # Create the above repo + echo foo > foo && + echo bar > bar && + echo baz > baz && + git add foo bar baz && + git commit -m initial && + echo bazz > baz && + git commit -a -m "second" && + git checkout -b conflict_branch HEAD^ && + echo barf > bar && + echo bazf > baz && + git commit -a -m "conflict" && + git checkout -b clean_branch HEAD^ && + echo bart > bar && + git commit -a -m "clean" && + git checkout master +' + +pre_merge_head="$(git rev-parse HEAD)" + +test_expect_success 'fails without MERGE_HEAD (unstarted merge)' ' + test_must_fail git merge --abort 2>output && + grep -q MERGE_HEAD output && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" +' + +test_expect_success 'fails without MERGE_HEAD (completed merge)' ' + git merge clean_branch && + test ! -f .git/MERGE_HEAD && + # Merge successfully completed + post_merge_head="$(git rev-parse HEAD)" && + test_must_fail git merge --abort 2>output && + grep -q MERGE_HEAD output && + test ! -f .git/MERGE_HEAD && + test "$post_merge_head" = "$(git rev-parse HEAD)" +' + +test_expect_success 'Forget previous merge' ' + git reset --hard "$pre_merge_head" +' + +test_expect_success 'Abort after --no-commit' ' + # Redo merge, but stop before creating merge commit + git merge --no-commit clean_branch && + test -f .git/MERGE_HEAD && + # Abort non-conflicting merge + git merge --abort && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff)" && + test -z "$(git diff --staged)" +' + +test_expect_success 'Abort after conflicts' ' + # Create conflicting merge + test_must_fail git merge conflict_branch && + test -f .git/MERGE_HEAD && + # Abort conflicting merge + git merge --abort && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff)" && + test -z "$(git diff --staged)" +' + +test_expect_success 'Clean merge with dirty index fails' ' + echo xyzzy >> foo && + git add foo && + git diff --staged > expect && + test_must_fail git merge clean_branch && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff)" && + git diff --staged > actual && + test_cmp expect actual +' + +test_expect_success 'Conflicting merge with dirty index fails' ' + test_must_fail git merge conflict_branch && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff)" && + git diff --staged > actual && + test_cmp expect actual +' + +test_expect_success 'Reset index (but preserve worktree changes)' ' + git reset "$pre_merge_head" && + git diff > actual && + test_cmp expect actual +' + +test_expect_success 'Abort clean merge with non-conflicting dirty worktree' ' + git merge --no-commit clean_branch && + test -f .git/MERGE_HEAD && + # Abort merge + git merge --abort && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff --staged)" && + git diff > actual && + test_cmp expect actual +' + +test_expect_success 'Abort conflicting merge with non-conflicting dirty worktree' ' + test_must_fail git merge conflict_branch && + test -f .git/MERGE_HEAD && + # Abort merge + git merge --abort && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff --staged)" && + git diff > actual && + test_cmp expect actual +' + +test_expect_success 'Reset worktree changes' ' + git reset --hard "$pre_merge_head" +' + +test_expect_success 'Fail clean merge with conflicting dirty worktree' ' + echo xyzzy >> bar && + git diff > expect && + test_must_fail git merge --no-commit clean_branch && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff --staged)" && + git diff > actual && + test_cmp expect actual +' + +test_expect_success 'Fail conflicting merge with conflicting dirty worktree' ' + test_must_fail git merge conflict_branch && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff --staged)" && + git diff > actual && + test_cmp expect actual +' + +test_expect_success 'Reset worktree changes' ' + git reset --hard "$pre_merge_head" +' + +test_expect_success 'Fail clean merge with matching dirty worktree' ' + echo bart > bar && + git diff > expect && + test_must_fail git merge --no-commit clean_branch && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff --staged)" && + git diff > actual && + test_cmp expect actual +' + +test_expect_success 'Abort clean merge with matching dirty index' ' + git add bar && + git diff --staged > expect && + git merge --no-commit clean_branch && + test -f .git/MERGE_HEAD && + ### When aborting the merge, git will discard all staged changes, + ### including those that were staged pre-merge. In other words, + ### --abort will LOSE any staged changes (the staged changes that + ### are lost must match the merge result, or the merge would not + ### have been allowed to start). Change expectations accordingly: + rm expect && + touch expect && + # Abort merge + git merge --abort && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + git diff --staged > actual && + test_cmp expect actual && + test -z "$(git diff)" +' + +test_expect_success 'Reset worktree changes' ' + git reset --hard "$pre_merge_head" +' + +test_expect_success 'Fail conflicting merge with matching dirty worktree' ' + echo barf > bar && + git diff > expect && + test_must_fail git merge conflict_branch && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + test -z "$(git diff --staged)" && + git diff > actual && + test_cmp expect actual +' + +test_expect_success 'Abort conflicting merge with matching dirty index' ' + git add bar && + git diff --staged > expect && + test_must_fail git merge conflict_branch && + test -f .git/MERGE_HEAD && + ### When aborting the merge, git will discard all staged changes, + ### including those that were staged pre-merge. In other words, + ### --abort will LOSE any staged changes (the staged changes that + ### are lost must match the merge result, or the merge would not + ### have been allowed to start). Change expectations accordingly: + rm expect && + touch expect && + # Abort merge + git merge --abort && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + git diff --staged > actual && + test_cmp expect actual && + test -z "$(git diff)" +' + +test_expect_success 'Reset worktree changes' ' + git reset --hard "$pre_merge_head" +' + +test_expect_success 'Abort merge with pre- and post-merge worktree changes' ' + # Pre-merge worktree changes + echo xyzzy > foo && + echo barf > bar && + git add bar && + git diff > expect && + git diff --staged > expect-staged && + # Perform merge + test_must_fail git merge conflict_branch && + test -f .git/MERGE_HEAD && + # Post-merge worktree changes + echo yzxxz > foo && + echo blech > baz && + ### When aborting the merge, git will discard staged changes (bar) + ### and unmerged changes (baz). Other changes that are neither + ### staged nor marked as unmerged (foo), will be preserved. For + ### these changed, git cannot tell pre-merge changes apart from + ### post-merge changes, so the post-merge changes will be + ### preserved. Change expectations accordingly: + git diff -- foo > expect && + rm expect-staged && + touch expect-staged && + # Abort merge + git merge --abort && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + git diff > actual && + test_cmp expect actual && + git diff --staged > actual-staged && + test_cmp expect-staged actual-staged +' + +test_expect_success 'Reset worktree changes' ' + git reset --hard "$pre_merge_head" +' + +test_expect_success 'Abort merge with pre- and post-merge index changes' ' + # Pre-merge worktree changes + echo xyzzy > foo && + echo barf > bar && + git add bar && + git diff > expect && + git diff --staged > expect-staged && + # Perform merge + test_must_fail git merge conflict_branch && + test -f .git/MERGE_HEAD && + # Post-merge worktree changes + echo yzxxz > foo && + echo blech > baz && + git add foo bar && + ### When aborting the merge, git will discard all staged changes + ### (foo, bar and baz), and no changes will be preserved. Whether + ### the changes were staged pre- or post-merge does not matter + ### (except for not preventing starting the merge). + ### Change expectations accordingly: + rm expect expect-staged && + touch expect && + touch expect-staged && + # Abort merge + git merge --abort && + test ! -f .git/MERGE_HEAD && + test "$pre_merge_head" = "$(git rev-parse HEAD)" && + git diff > actual && + test_cmp expect actual && + git diff --staged > actual-staged && + test_cmp expect-staged actual-staged +' + +test_done |