Add fxcrt::AutoRestorer<T>::AbandonRestoration().chromium/3475

Kinda like reaching a commit point, makes going forward more useful.

Change-Id: I7695b6e627d4cd8ed2bccb667d0cabd7f42c7b1c
Reviewed-on: https://pdfium-review.googlesource.com/35970
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/core/fxcrt/autorestorer_unittest.cpp b/core/fxcrt/autorestorer_unittest.cpp
new file mode 100644
index 0000000000..ac1d613e7c
--- /dev/null
+++ b/core/fxcrt/autorestorer_unittest.cpp
@@ -0,0 +1,23 @@
+// Copyright 2018 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/fxcrt/autorestorer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(fxcrt, AutoRestorer) {
+  int x = 5;
+  {
+    AutoRestorer<int> restorer(&x);
+    x = 6;
+    EXPECT_EQ(6, x);
+  }
+  EXPECT_EQ(5, x);
+  {
+    AutoRestorer<int> restorer(&x);
+    x = 6;
+    EXPECT_EQ(6, x);
+    restorer.AbandonRestoration();
+  }
+  EXPECT_EQ(6, x);
+}