Move revwalk test to clar

tests-clar/revwalk/basic.c

+#include "clar_libgit2.h"
+
+/*
+	$ git log --oneline --graph --decorate
+	*   a4a7dce (HEAD, br2) Merge branch 'master' into br2
+	|\
+	| * 9fd738e (master) a fourth commit
+	| * 4a202b3 a third commit
+	* | c47800c branch commit one
+	|/
+	* 5b5b025 another commit
+	* 8496071 testing
+*/
+static const char *commit_head = "a4a7dce85cf63874e984719f4fdd239f5145052f";
+
+static const char *commit_ids[] = {
+	"a4a7dce85cf63874e984719f4fdd239f5145052f", /* 0 */
+	"9fd738e8f7967c078dceed8190330fc8648ee56a", /* 1 */
+	"4a202b346bb0fb0db7eff3cffeb3c70babbd2045", /* 2 */
+	"c47800c7266a2be04c571c04d5a6614691ea99bd", /* 3 */
+	"8496071c1b46c854b31185ea97743be6a8774479", /* 4 */
+	"5b5b025afb0b4c913b4c338a42934a3863bf3644", /* 5 */
+};
+
+/* Careful: there are two possible topological sorts */
+static const int commit_sorting_topo[][6] = {
+	{0, 1, 2, 3, 5, 4}, {0, 3, 1, 2, 5, 4}
+};
+
+static const int commit_sorting_time[][6] = {
+	{0, 3, 1, 2, 5, 4}
+};
+
+static const int commit_sorting_topo_reverse[][6] = {
+	{4, 5, 3, 2, 1, 0}, {4, 5, 2, 1, 3, 0}
+};
+
+static const int commit_sorting_time_reverse[][6] = {
+	{4, 5, 2, 1, 3, 0}
+};
+
+#define commit_count 6
+static const int result_bytes = 24;
+
+
+static int get_commit_index(git_oid *raw_oid)
+{
+	int i;
+	char oid[40];
+
+	git_oid_fmt(oid, raw_oid);
+
+	for (i = 0; i < commit_count; ++i)
+		if (memcmp(oid, commit_ids[i], 40) == 0)
+			return i;
+
+	return -1;
+}
+
+static int test_walk(git_revwalk *walk, const git_oid *root,
+		int flags, const int possible_results[][6], int results_count)
+{
+	git_oid oid;
+
+	int i;
+	int result_array[commit_count];
+
+	git_revwalk_sorting(walk, flags);
+	git_revwalk_push(walk, root);
+
+	for (i = 0; i < commit_count; ++i)
+		result_array[i] = -1;
+
+	i = 0;
+
+	while (git_revwalk_next(&oid, walk) == GIT_SUCCESS) {
+		result_array[i++] = get_commit_index(&oid);
+		/*{
+			char str[41];
+			git_oid_fmt(str, &oid);
+			str[40] = 0;
+			printf("  %d) %s\n", i, str);
+		}*/
+	}
+
+	for (i = 0; i < results_count; ++i)
+		if (memcmp(possible_results[i],
+				result_array, result_bytes) == 0)
+			return GIT_SUCCESS;
+
+	return GIT_ERROR;
+}
+
+static git_repository *_repo;
+static git_revwalk *_walk;
+
+void test_revwalk_basic__initialize(void)
+{
+	cl_git_pass(git_repository_open(&_repo, cl_fixture("testrepo.git")));
+	cl_git_pass(git_revwalk_new(&_walk, _repo));
+}
+
+void test_revwalk_basic__cleanup(void)
+{
+	git_revwalk_free(_walk);
+	git_repository_free(_repo);
+}
+
+void test_revwalk_basic__sorting_modes(void)
+{
+	git_oid id;
+
+	git_oid_fromstr(&id, commit_head);
+
+	cl_git_pass(test_walk(_walk, &id, GIT_SORT_TIME, commit_sorting_time, 1));
+	cl_git_pass(test_walk(_walk, &id, GIT_SORT_TOPOLOGICAL, commit_sorting_topo, 2));
+	cl_git_pass(test_walk(_walk, &id, GIT_SORT_TIME | GIT_SORT_REVERSE, commit_sorting_time_reverse, 1));
+	cl_git_pass(test_walk(_walk, &id, GIT_SORT_TOPOLOGICAL | GIT_SORT_REVERSE, commit_sorting_topo_reverse, 2));
+}