Add `git_graph_descendant_of`.

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/graph/descendant_of.c b/tests/graph/descendant_of.c
new file mode 100644
index 000000000..ffdd0cfc8
--- /dev/null
+++ b/tests/graph/descendant_of.c
@@ -0,0 +1,47 @@
+#include "clar_libgit2.h"
+
+static git_repository *_repo;
+static git_commit *commit;
+
+void test_graph_descendant_of__initialize(void)
+{
+	git_oid oid;
+
+	cl_git_pass(git_repository_open(&_repo, cl_fixture("testrepo.git")));
+
+	git_oid_fromstr(&oid, "be3563ae3f795b2b4353bcce3a527ad0a4f7f644");
+	cl_git_pass(git_commit_lookup(&commit, _repo, &oid));
+}
+
+void test_graph_descendant_of__cleanup(void)
+{
+	git_commit_free(commit);
+	commit = NULL;
+
+	git_repository_free(_repo);
+	_repo = NULL;
+}
+
+void test_graph_descendant_of__returns_correct_result(void)
+{
+	git_commit *other;
+
+	cl_assert_equal_i(0, git_graph_descendant_of(_repo, git_commit_id(commit), git_commit_id(commit)));
+
+
+	cl_git_pass(git_commit_nth_gen_ancestor(&other, commit, 1));
+
+	cl_assert_equal_i(1, git_graph_descendant_of(_repo, git_commit_id(commit), git_commit_id(other)));
+	cl_assert_equal_i(0, git_graph_descendant_of(_repo, git_commit_id(other), git_commit_id(commit)));
+
+	git_commit_free(other);
+
+
+	cl_git_pass(git_commit_nth_gen_ancestor(&other, commit, 3));
+
+	cl_assert_equal_i(1, git_graph_descendant_of(_repo, git_commit_id(commit), git_commit_id(other)));
+	cl_assert_equal_i(0, git_graph_descendant_of(_repo, git_commit_id(other), git_commit_id(commit)));
+
+	git_commit_free(other);
+
+}