From 9ffed9a2539550539fd219a5273d3355cfd55784 Mon Sep 17 00:00:00 2001
From: Jacob Dufault <jacobdufault@gmail.com>
Date: Mon, 8 May 2017 18:21:21 -0700
Subject: [PATCH] Add assert when updating test expectations

---
 src/utils.cc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/utils.cc b/src/utils.cc
index eae689d0..e5dd420c 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -1,9 +1,9 @@
 #include "utils.h"
 
-#include <algorithm> 
+#include <algorithm>
 #include <cassert>
 #include <cctype>
-#include <functional> 
+#include <functional>
 #include <iostream>
 #include <fstream>
 #include <locale>
@@ -244,6 +244,7 @@ void UpdateTestExpectation(const std::string& filename, const std::string& expec
 
   // Replace expectation
   auto it = str.find(expectation);
+  assert(it != std::string::npos);
   str.replace(it, expectation.size(), actual);
 
   // Write it back out.