non-throwing, non-allocating exception_wrapper

[folly.git] / folly / test / OptionalTest.cpp

diff --git a/folly/test/OptionalTest.cpp b/folly/test/OptionalTest.cpp
index 42fd4926808156978f27a07c0425546fa492e85c..b7484dfa978b6488050eab02470ad15982ea9f67 100644 (file)
--- a/folly/test/OptionalTest.cpp
+++ b/folly/test/OptionalTest.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,15 +15,16 @@
  */
 
 #include <folly/Optional.h>
+#include <folly/portability/GTest.h>
 
-#include <memory>
-#include <vector>
 #include <algorithm>
 #include <iomanip>
+#include <memory>
 #include <string>
+#include <type_traits>
+#include <unordered_map>
+#include <vector>
 
-#include <glog/logging.h>
-#include <gtest/gtest.h>
 #include <boost/optional.hpp>
 
 using std::unique_ptr;
@@ -172,26 +173,12 @@ struct ExpectingDeleter {
   }
 };
 
-TEST(Optional, value_life_extention) {
-  // Extends the life of the value.
-  const auto& ptr = Optional<std::unique_ptr<int, ExpectingDeleter>>(
-      {new int(42), ExpectingDeleter{1337}}).value();
-  *ptr = 1337;
-}
-
 TEST(Optional, value_move) {
   auto ptr = Optional<std::unique_ptr<int, ExpectingDeleter>>(
       {new int(42), ExpectingDeleter{1337}}).value();
   *ptr = 1337;
 }
 
-TEST(Optional, dereference_life_extention) {
-  // Extends the life of the value.
-  const auto& ptr = *Optional<std::unique_ptr<int, ExpectingDeleter>>(
-      {new int(42), ExpectingDeleter{1337}});
-  *ptr = 1337;
-}
-
 TEST(Optional, dereference_move) {
   auto ptr = *Optional<std::unique_ptr<int, ExpectingDeleter>>(
       {new int(42), ExpectingDeleter{1337}});
@@ -472,11 +459,9 @@ TEST(Optional, MakeOptional) {
   EXPECT_EQ(**optIntPtr, 3);
 }
 
-#ifdef __clang__
+#if __clang__
 # pragma clang diagnostic push
-# if __clang_major__ > 3 || __clang_minor__ >= 6
-#  pragma clang diagnostic ignored "-Wself-move"
-# endif
+# pragma clang diagnostic ignored "-Wself-move"
 #endif
 
 TEST(Optional, SelfAssignment) {
@@ -489,8 +474,8 @@ TEST(Optional, SelfAssignment) {
   ASSERT_TRUE(b.hasValue() && b.value() == 23333333);
 }
 
-#ifdef __clang__
-#pragma clang diagnostic pop
+#if __clang__
+# pragma clang diagnostic pop
 #endif
 
 class ContainsOptional {
@@ -542,4 +527,29 @@ TEST(Optional, Exceptions) {
   EXPECT_THROW(empty.value(), OptionalEmptyException);
 }
 
+TEST(Optional, NoThrowDefaultConstructible) {
+  EXPECT_TRUE(std::is_nothrow_default_constructible<Optional<bool>>::value);
+}
+
+struct NoDestructor {};
+
+struct WithDestructor {
+  ~WithDestructor();
+};
+
+TEST(Optional, TriviallyDestructible) {
+  // These could all be static_asserts but EXPECT_* give much nicer output on
+  // failure.
+  EXPECT_TRUE(std::is_trivially_destructible<Optional<NoDestructor>>::value);
+  EXPECT_TRUE(std::is_trivially_destructible<Optional<int>>::value);
+  EXPECT_FALSE(std::is_trivially_destructible<Optional<WithDestructor>>::value);
+}
+
+TEST(Optional, Hash) {
+  // Test it's usable in std::unordered map (compile time check)
+  std::unordered_map<Optional<int>, Optional<int>> obj;
+  // Also check the std::hash template can be instantiated by the compiler
+  std::hash<Optional<int>>()(none);
+  std::hash<Optional<int>>()(3);
+}
 }