repo: understand the `objectformat` extension

Teach the repository about the `objectformat` extension, supporting
`sha1` always and `sha256` when the experimental sha256 support is
active.

2 files changed, 78 insertions, 6 deletions

diff --git a/tests/libgit2/core/opts.c b/tests/libgit2/core/opts.c
index e8f65d510..486ff58c6 100644
--- a/tests/libgit2/core/opts.c
+++ b/tests/libgit2/core/opts.c
@@ -34,8 +34,9 @@ void test_core_opts__extensions_query(void)
 
 	cl_git_pass(git_libgit2_opts(GIT_OPT_GET_EXTENSIONS, &out));
 
-	cl_assert_equal_sz(out.count, 1);
+	cl_assert_equal_sz(out.count, 2);
 	cl_assert_equal_s("noop", out.strings[0]);
+	cl_assert_equal_s("objectformat", out.strings[1]);
 
 	git_strarray_dispose(&out);
 }
@@ -48,9 +49,10 @@ void test_core_opts__extensions_add(void)
 	cl_git_pass(git_libgit2_opts(GIT_OPT_SET_EXTENSIONS, in, ARRAY_SIZE(in)));
 	cl_git_pass(git_libgit2_opts(GIT_OPT_GET_EXTENSIONS, &out));
 
-	cl_assert_equal_sz(out.count, 2);
+	cl_assert_equal_sz(out.count, 3);
 	cl_assert_equal_s("noop", out.strings[0]);
-	cl_assert_equal_s("foo", out.strings[1]);
+	cl_assert_equal_s("objectformat", out.strings[1]);
+	cl_assert_equal_s("foo", out.strings[2]);
 
 	git_strarray_dispose(&out);
 }
@@ -63,9 +65,10 @@ void test_core_opts__extensions_remove(void)
 	cl_git_pass(git_libgit2_opts(GIT_OPT_SET_EXTENSIONS, in, ARRAY_SIZE(in)));
 	cl_git_pass(git_libgit2_opts(GIT_OPT_GET_EXTENSIONS, &out));
 
-	cl_assert_equal_sz(out.count, 2);
-	cl_assert_equal_s("bar", out.strings[0]);
-	cl_assert_equal_s("baz", out.strings[1]);
+	cl_assert_equal_sz(out.count, 3);
+	cl_assert_equal_s("objectformat", out.strings[0]);
+	cl_assert_equal_s("bar", out.strings[1]);
+	cl_assert_equal_s("baz", out.strings[2]);
 
 	git_strarray_dispose(&out);
 }
diff --git a/tests/libgit2/repo/objectformat.c b/tests/libgit2/repo/objectformat.c
new file mode 100644
index 000000000..3518115f4
--- /dev/null
+++ b/tests/libgit2/repo/objectformat.c
@@ -0,0 +1,69 @@
+#include "clar_libgit2.h"
+#include "futils.h"
+#include "sysdir.h"
+#include "repository.h"
+#include <ctype.h>
+
+git_repository *repo;
+git_config *config;
+
+void test_repo_objectformat__initialize(void)
+{
+	repo = cl_git_sandbox_init("empty_bare.git");
+
+	cl_git_pass(git_repository_config(&config, repo));
+	cl_git_pass(git_config_set_int32(config, "core.repositoryformatversion", 1));
+}
+
+void test_repo_objectformat__cleanup(void)
+{
+	git_config_free(config);
+	cl_git_sandbox_cleanup();
+}
+
+void test_repo_objectformat__unspecified(void)
+{
+	git_repository *other;
+
+	cl_git_pass(git_repository_open(&other, "empty_bare.git"));
+	cl_assert_equal_i(GIT_OID_SHA1, git_repository_oid_type(other));
+	git_repository_free(other);
+}
+
+void test_repo_objectformat__sha1(void)
+{
+	git_repository *other;
+
+	cl_git_pass(git_config_set_string(config, "extensions.objectformat", "sha1"));
+
+	cl_git_pass(git_repository_open(&other, "empty_bare.git"));
+	cl_assert_equal_i(GIT_OID_SHA1, git_repository_oid_type(other));
+	git_repository_free(other);
+}
+
+void test_repo_objectformat__sha256(void)
+{
+#ifndef GIT_EXPERIMENTAL_SHA256
+	cl_skip();
+#else
+	git_repository *other;
+
+	cl_git_pass(git_config_set_string(config, "extensions.objectformat", "sha256"));
+
+	cl_git_pass(git_repository_open(&other, "empty_bare.git"));
+	cl_assert_equal_i(GIT_OID_SHA256, git_repository_oid_type(other));
+	git_repository_free(other);
+#endif
+}
+
+void test_repo_objectformat__invalid(void)
+{
+	git_repository *other;
+
+	cl_git_pass(git_config_set_string(config, "extensions.objectformat", "bogus"));
+
+	cl_git_fail_with(GIT_EINVALID, git_repository_open(&other, "empty_bare.git"));
+	cl_assert_equal_s("unknown object format 'bogus'", git_error_last()->message);
+	git_repository_free(other);
+}
+