1 files changed, 15 insertions, 0 deletions
diff --git a/test_utils.h b/test_utils.h
index 7ed735d..e922343 100644
--- a/test_utils.h
+++ b/test_utils.h
@@ -15,6 +15,21 @@ namespace zucchini {
 // Parses space-separated list of byte hex values into list.
 std::vector<uint8_t> ParseHexString(const std::string& hex_string);
 
+// Returns a vector that's the contatenation of two vectors of the same type.
+// Elements are copied by value.
+template <class T>
+std::vector<T> Cat(const std::vector<T>& a, const std::vector<T>& b) {
+  std::vector<T> ret(a);
+  ret.insert(ret.end(), b.begin(), b.end());
+  return ret;
+}
+
+// Returns a subvector of a vector. Elements are copied by value.
+template <class T>
+std::vector<T> Sub(const std::vector<T>& a, size_t lo, size_t hi) {
+  return std::vector<T>(a.begin() + lo, a.begin() + hi);
+}
+
 }  // namespace zucchini
 
 #endif  // COMPONENTS_ZUCCHINI_TEST_UTILS_H_