1 files changed, 121 insertions, 0 deletions
diff --git a/tests/libgit2/odb/backend/multiple.c b/tests/libgit2/odb/backend/multiple.c
new file mode 100644
index 000000000..5f1eacd52
--- /dev/null
+++ b/tests/libgit2/odb/backend/multiple.c
@@ -0,0 +1,121 @@
+#include "clar_libgit2.h"
+#include "repository.h"
+#include "backend_helpers.h"
+
+#define EXISTING_HASH "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
+
+static git_repository *_repo;
+static git_odb_object *_obj;
+static fake_backend *_fake_empty;
+static fake_backend *_fake_filled;
+
+static git_oid _existing_oid;
+
+static const fake_object _objects_filled[] = {
+	{ EXISTING_HASH, "" },
+	{ NULL, NULL }
+};
+
+static const fake_object _objects_empty[] = {
+	{ NULL, NULL }
+};
+
+void test_odb_backend_multiple__initialize(void)
+{
+	git_odb_backend *backend;
+
+	git_oid_fromstr(&_existing_oid, EXISTING_HASH);
+
+	_obj = NULL;
+	_repo = cl_git_sandbox_init("testrepo.git");
+
+	cl_git_pass(build_fake_backend(&backend, _objects_filled, false));
+	_fake_filled = (fake_backend *)backend;
+
+	cl_git_pass(build_fake_backend(&backend, _objects_empty, false));
+	_fake_empty = (fake_backend *)backend;
+}
+
+void test_odb_backend_multiple__cleanup(void)
+{
+	git_odb_object_free(_obj);
+	cl_git_sandbox_cleanup();
+}
+
+void test_odb_backend_multiple__read_with_empty_first_succeeds(void)
+{
+	git_odb *odb;
+
+	cl_git_pass(git_repository_odb__weakptr(&odb, _repo));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_filled, 10));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_empty, 50));
+
+	cl_git_pass(git_odb_read(&_obj, odb, &_existing_oid));
+
+	cl_assert_equal_i(1, _fake_filled->read_calls);
+	cl_assert_equal_i(1, _fake_empty->read_calls);
+}
+
+void test_odb_backend_multiple__read_with_first_matching_stops(void)
+{
+	git_odb *odb;
+
+	cl_git_pass(git_repository_odb__weakptr(&odb, _repo));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_empty, 10));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_filled, 50));
+
+	cl_git_pass(git_odb_read(&_obj, odb, &_existing_oid));
+
+	cl_assert_equal_i(1, _fake_filled->read_calls);
+	cl_assert_equal_i(0, _fake_empty->read_calls);
+}
+
+void test_odb_backend_multiple__read_prefix_with_first_empty_succeeds(void)
+{
+	git_odb *odb;
+
+	cl_git_pass(git_repository_odb__weakptr(&odb, _repo));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_filled, 10));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_empty, 50));
+
+	cl_git_pass(git_odb_read_prefix(&_obj, odb, &_existing_oid, 7));
+
+	cl_assert_equal_i(1, _fake_filled->read_prefix_calls);
+	cl_assert_equal_i(1, _fake_empty->read_prefix_calls);
+}
+
+void test_odb_backend_multiple__read_prefix_with_first_matching_reads_both(void)
+{
+	git_odb *odb;
+
+	cl_git_pass(git_repository_odb__weakptr(&odb, _repo));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_empty, -10));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_filled, 50));
+
+	cl_git_pass(git_odb_read_prefix(&_obj, odb, &_existing_oid, 7));
+
+	cl_assert_equal_i(1, _fake_filled->read_prefix_calls);
+	cl_assert_equal_i(1, _fake_empty->read_prefix_calls);
+}
+
+void test_odb_backend_multiple__read_prefix_with_first_matching_succeeds_without_hash_verification(void)
+{
+	git_odb *odb;
+
+	git_libgit2_opts(GIT_OPT_ENABLE_STRICT_HASH_VERIFICATION, 0);
+
+	cl_git_pass(git_repository_odb__weakptr(&odb, _repo));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_empty, -10));
+	cl_git_pass(git_odb_add_backend(odb, (git_odb_backend *)_fake_filled, 50));
+
+	cl_git_pass(git_odb_read_prefix(&_obj, odb, &_existing_oid, 7));
+
+	/*
+	 * Both backends should be checked as we have to check
+	 * for collisions
+	 */
+	cl_assert_equal_i(1, _fake_filled->read_prefix_calls);
+	cl_assert_equal_i(1, _fake_empty->read_prefix_calls);
+
+	git_libgit2_opts(GIT_OPT_ENABLE_STRICT_HASH_VERIFICATION, 1);
+}