1 files changed, 55 insertions, 0 deletions
diff --git a/mfbt/tests/TestScopeExit.cpp b/mfbt/tests/TestScopeExit.cpp
new file mode 100644
index 0000000000..1c5eef68c2
--- /dev/null
+++ b/mfbt/tests/TestScopeExit.cpp
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/Assertions.h"
+#include "mozilla/ScopeExit.h"
+
+using mozilla::MakeScopeExit;
+
+#define CHECK(c)                                       \
+  do {                                                 \
+    bool cond = !!(c);                                 \
+    MOZ_RELEASE_ASSERT(cond, "Failed assertion: " #c); \
+    if (!cond) {                                       \
+      return false;                                    \
+    }                                                  \
+  } while (false)
+
+static bool Test() {
+  int a = 1;
+  int b = 1;
+  int c = 1;
+
+  {
+    a++;
+    auto guardA = MakeScopeExit([&] { a--; });
+
+    b++;
+    auto guardB = MakeScopeExit([&] { b--; });
+
+    guardB.release();
+
+    c++;
+    auto guardC = MakeScopeExit([&] { c--; });
+
+    { auto guardC_ = std::move(guardC); }
+
+    CHECK(c == 1);
+  }
+
+  CHECK(a == 1);
+  CHECK(b == 2);
+  CHECK(c == 1);
+
+  return true;
+}
+
+int main() {
+  if (!Test()) {
+    return 1;
+  }
+  return 0;
+}