More index collision tests

tests/index/collision.c

@@ -40,3 +40,67 @@ void test_index_collision__add(void)
 	git_tree_free(tree);
 	git_index_free(index);
 }
+
+void test_index_collision__add_with_highstage_1(void)
+{
+	git_index *index;
+	git_index_entry entry;
+
+	repo = cl_git_sandbox_init("empty_standard_repo");
+	cl_git_pass(git_repository_index(&index, repo));
+
+	memset(&entry, 0, sizeof(entry));
+	entry.ctime.seconds = 12346789;
+	entry.mtime.seconds = 12346789;
+	entry.mode  = 0100644;
+	entry.file_size = 0;
+	git_oid_fromstr(&entry.id, "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391");
+
+	entry.path = "a/b";
+	entry.flags = (2 << GIT_IDXENTRY_STAGESHIFT);
+	cl_git_pass(git_index_add(index, &entry));
+
+	/* create a blob beneath the previous tree entry */
+	entry.path = "a/b/c";
+	entry.flags = 0;
+	cl_git_pass(git_index_add(index, &entry));
+
+	/* create another tree entry above the blob */
+	entry.path = "a/b";
+	entry.flags = (1 << GIT_IDXENTRY_STAGESHIFT);
+	cl_git_pass(git_index_add(index, &entry));
+
+	git_index_free(index);
+}
+
+void test_index_collision__add_with_highstage_2(void)
+{
+	git_index *index;
+	git_index_entry entry;
+
+	repo = cl_git_sandbox_init("empty_standard_repo");
+	cl_git_pass(git_repository_index(&index, repo));
+
+	memset(&entry, 0, sizeof(entry));
+	entry.ctime.seconds = 12346789;
+	entry.mtime.seconds = 12346789;
+	entry.mode  = 0100644;
+	entry.file_size = 0;
+	git_oid_fromstr(&entry.id, "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391");
+
+	entry.path = "a/b/c";
+	entry.flags = (1 << GIT_IDXENTRY_STAGESHIFT);
+	cl_git_pass(git_index_add(index, &entry));
+
+	/* create a blob beneath the previous tree entry */
+	entry.path = "a/b/c";
+	entry.flags = (2 << GIT_IDXENTRY_STAGESHIFT);
+	cl_git_pass(git_index_add(index, &entry));
+
+	/* create another tree entry above the blob */
+	entry.path = "a/b";
+	entry.flags = (3 << GIT_IDXENTRY_STAGESHIFT);
+	cl_git_pass(git_index_add(index, &entry));
+
+	git_index_free(index);
+}