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Diffstat (limited to 't/t6436-merge-overwrite.sh')
| -rwxr-xr-x | t/t6436-merge-overwrite.sh | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/t/t6436-merge-overwrite.sh b/t/t6436-merge-overwrite.sh new file mode 100755 index 0000000..4f43764 --- /dev/null +++ b/t/t6436-merge-overwrite.sh @@ -0,0 +1,207 @@ +#!/bin/sh + +test_description='git-merge + +Do not overwrite changes.' + +GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main +export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME + +. ./test-lib.sh + +test_expect_success 'setup' ' + test_commit c0 c0.c && + test_commit c1 c1.c && + test_commit c1a c1.c "c1 a" && + git reset --hard c0 && + test_commit c2 c2.c && + git reset --hard c0 && + mkdir sub && + echo "sub/f" > sub/f && + mkdir sub2 && + echo "sub2/f" > sub2/f && + git add sub/f sub2/f && + git commit -m sub && + git tag sub && + echo "VERY IMPORTANT CHANGES" > important +' + +test_expect_success 'will not overwrite untracked file' ' + git reset --hard c1 && + cp important c2.c && + test_must_fail git merge c2 && + test_path_is_missing .git/MERGE_HEAD && + test_cmp important c2.c +' + +test_expect_success 'will overwrite tracked file' ' + git reset --hard c1 && + cp important c2.c && + git add c2.c && + git commit -m important && + git checkout c2 +' + +test_expect_success 'will not overwrite new file' ' + git reset --hard c1 && + cp important c2.c && + git add c2.c && + test_must_fail git merge c2 && + test_path_is_missing .git/MERGE_HEAD && + test_cmp important c2.c +' + +test_expect_success 'will not overwrite staged changes' ' + git reset --hard c1 && + cp important c2.c && + git add c2.c && + rm c2.c && + test_must_fail git merge c2 && + test_path_is_missing .git/MERGE_HEAD && + git checkout c2.c && + test_cmp important c2.c +' + +test_expect_success 'will not overwrite removed file' ' + git reset --hard c1 && + git rm c1.c && + git commit -m "rm c1.c" && + cp important c1.c && + test_must_fail git merge c1a && + test_cmp important c1.c && + rm c1.c # Do not leave untracked file in way of future tests +' + +test_expect_success 'will not overwrite re-added file' ' + git reset --hard c1 && + git rm c1.c && + git commit -m "rm c1.c" && + cp important c1.c && + git add c1.c && + test_must_fail git merge c1a && + test_path_is_missing .git/MERGE_HEAD && + test_cmp important c1.c +' + +test_expect_success 'will not overwrite removed file with staged changes' ' + git reset --hard c1 && + git rm c1.c && + git commit -m "rm c1.c" && + cp important c1.c && + git add c1.c && + rm c1.c && + test_must_fail git merge c1a && + test_path_is_missing .git/MERGE_HEAD && + git checkout c1.c && + test_cmp important c1.c +' + +test_expect_success 'will not overwrite unstaged changes in renamed file' ' + git reset --hard c1 && + git mv c1.c other.c && + git commit -m rename && + cp important other.c && + if test "$GIT_TEST_MERGE_ALGORITHM" = ort + then + test_must_fail git merge c1a >out 2>err && + test_grep "would be overwritten by merge" err && + test_cmp important other.c && + test_path_is_missing .git/MERGE_HEAD + else + test_must_fail git merge c1a >out && + test_grep "Refusing to lose dirty file at other.c" out && + test_path_is_file other.c~HEAD && + test $(git hash-object other.c~HEAD) = $(git rev-parse c1a:c1.c) && + test_cmp important other.c + fi +' + +test_expect_success 'will not overwrite untracked subtree' ' + git reset --hard c0 && + rm -rf sub && + mkdir -p sub/f && + cp important sub/f/important && + test_must_fail git merge sub && + test_path_is_missing .git/MERGE_HEAD && + test_cmp important sub/f/important +' + +cat >expect <<\EOF +error: The following untracked working tree files would be overwritten by merge: + sub + sub2 +Please move or remove them before you merge. +Aborting +EOF + +test_expect_success 'will not overwrite untracked file in leading path' ' + git reset --hard c0 && + rm -rf sub && + cp important sub && + cp important sub2 && + test_must_fail git merge sub 2>out && + test_cmp out expect && + test_path_is_missing .git/MERGE_HEAD && + test_cmp important sub && + test_cmp important sub2 && + rm -f sub sub2 +' + +test_expect_success SYMLINKS 'will not overwrite untracked symlink in leading path' ' + git reset --hard c0 && + rm -rf sub && + mkdir sub2 && + ln -s sub2 sub && + test_must_fail git merge sub && + test_path_is_missing .git/MERGE_HEAD +' + +test_expect_success 'will not be confused by symlink in leading path' ' + git reset --hard c0 && + rm -rf sub && + test_ln_s_add sub2 sub && + git commit -m ln && + git checkout sub +' + +cat >expect <<\EOF +error: Untracked working tree file 'c0.c' would be overwritten by merge. +fatal: read-tree failed +EOF + +test_expect_success 'will not overwrite untracked file on unborn branch' ' + git reset --hard c0 && + git rm -fr . && + git checkout --orphan new && + cp important c0.c && + test_must_fail git merge c0 2>out && + test_cmp out expect +' + +test_expect_success 'will not overwrite untracked file on unborn branch .git/MERGE_HEAD sanity etc.' ' + test_when_finished "rm c0.c" && + test_path_is_missing .git/MERGE_HEAD && + test_cmp important c0.c +' + +test_expect_success 'failed merge leaves unborn branch in the womb' ' + test_must_fail git rev-parse --verify HEAD +' + +test_expect_success 'set up unborn branch and content' ' + git symbolic-ref HEAD refs/heads/unborn && + rm -f .git/index && + echo foo > tracked-file && + git add tracked-file && + echo bar > untracked-file +' + +test_expect_success 'will not clobber WT/index when merging into unborn' ' + git merge main && + grep foo tracked-file && + git show :tracked-file >expect && + grep foo expect && + grep bar untracked-file +' + +test_done |