@@ -117,6 +117,7 @@ test_perf_on_all git diff
test_perf_on_all git diff --cached
test_perf_on_all git blame $SPARSE_CONE/a
test_perf_on_all git blame $SPARSE_CONE/f3/a
+test_perf_on_all git read-tree -mu HEAD
test_perf_on_all git checkout-index -f --all
test_perf_on_all git update-index --add --remove $SPARSE_CONE/a
@@ -819,6 +819,91 @@ test_expect_success 'update-index --cacheinfo' '
test_cmp expect sparse-checkout-out
'
+test_expect_success 'read-tree --merge with files outside sparse definition' '
+ init_repos &&
+
+ test_all_match git checkout -b test-branch update-folder1 &&
+ for MERGE_TREES in "base HEAD update-folder2" \
+ "update-folder1 update-folder2" \
+ "update-folder2"
+ do
+ # Clean up and remove on-disk files
+ test_all_match git reset --hard HEAD &&
+ test_sparse_match git sparse-checkout reapply &&
+
+ # Although the index matches, without --no-sparse-checkout, outside-of-
+ # definition files will not exist on disk for sparse checkouts
+ test_all_match git read-tree -mu $MERGE_TREES &&
+ test_all_match git status --porcelain=v2 &&
+ test_path_is_missing sparse-checkout/folder2 &&
+ test_path_is_missing sparse-index/folder2 &&
+
+ test_all_match git read-tree --reset -u HEAD &&
+ test_all_match git status --porcelain=v2 &&
+
+ test_all_match git read-tree -mu --no-sparse-checkout $MERGE_TREES &&
+ test_all_match git status --porcelain=v2 &&
+ test_cmp sparse-checkout/folder2/a sparse-index/folder2/a &&
+ test_cmp sparse-checkout/folder2/a full-checkout/folder2/a || return 1
+ done
+'
+
+test_expect_success 'read-tree --merge with edit/edit conflicts in sparse directories' '
+ init_repos &&
+
+ # Merge of multiple changes to same directory (but not same files) should
+ # succeed
+ test_all_match git read-tree -mu base rename-base update-folder1 &&
+ test_all_match git status --porcelain=v2 &&
+
+ test_all_match git reset --hard &&
+
+ test_all_match git read-tree -mu rename-base update-folder2 &&
+ test_all_match git status --porcelain=v2 &&
+
+ test_all_match git reset --hard &&
+
+ test_all_match test_must_fail git read-tree -mu base update-folder1 rename-out-to-in &&
+ test_all_match test_must_fail git read-tree -mu rename-out-to-in update-folder1
+'
+
+test_expect_success 'read-tree --prefix outside sparse definition' '
+ init_repos &&
+
+ # Cannot read-tree --prefix with a single argument when files exist within
+ # prefix
+ test_all_match test_must_fail git read-tree --prefix=folder1/ -u update-folder1 &&
+
+ test_all_match git read-tree --prefix=folder2/0 -u rename-base &&
+ test_path_is_missing sparse-checkout/folder2 &&
+ test_path_is_missing sparse-index/folder2 &&
+
+ test_all_match git read-tree --reset -u HEAD &&
+ test_all_match git read-tree --prefix=folder2/0 -u --no-sparse-checkout rename-base &&
+ test_cmp sparse-checkout/folder2/0/a sparse-index/folder2/0/a &&
+ test_cmp sparse-checkout/folder2/0/a full-checkout/folder2/0/a
+'
+
+test_expect_success 'read-tree --merge with directory-file conflicts' '
+ init_repos &&
+
+ test_all_match git checkout -b test-branch rename-base &&
+
+ # Although the index matches, without --no-sparse-checkout, outside-of-
+ # definition files will not exist on disk for sparse checkouts
+ test_sparse_match git read-tree -mu rename-out-to-out &&
+ test_sparse_match git status --porcelain=v2 &&
+ test_path_is_missing sparse-checkout/folder2 &&
+ test_path_is_missing sparse-index/folder2 &&
+
+ test_sparse_match git read-tree --reset -u HEAD &&
+ test_sparse_match git status --porcelain=v2 &&
+
+ test_sparse_match git read-tree -mu --no-sparse-checkout rename-out-to-out &&
+ test_sparse_match git status --porcelain=v2 &&
+ test_cmp sparse-checkout/folder2/0/1 sparse-index/folder2/0/1
+'
+
test_expect_success 'merge, cherry-pick, and rebase' '
init_repos &&