/*
- * Copyright 2014 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.
*/
#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;
other.s_ = "";
}
MoveTester& operator=(const MoveTester&) = default;
- MoveTester& operator=(MoveTester&&) = default;
+ MoveTester& operator=(MoveTester&& other) noexcept {
+ s_ = std::move(other.s_);
+ other.s_ = "";
+ return *this;
+ }
private:
friend bool operator==(const MoveTester& o1, const MoveTester& o2);
std::string s_;
EXPECT_EQ(42, *std::move(opt).value_or(std::move(dflt)));
}
+struct ExpectingDeleter {
+ explicit ExpectingDeleter(int expected) : expected(expected) { }
+ int expected;
+ void operator()(const int* ptr) {
+ EXPECT_EQ(*ptr, expected);
+ delete ptr;
+ }
+};
+
+TEST(Optional, value_move) {
+ auto ptr = Optional<std::unique_ptr<int, ExpectingDeleter>>(
+ {new int(42), ExpectingDeleter{1337}}).value();
+ *ptr = 1337;
+}
+
+TEST(Optional, dereference_move) {
+ auto ptr = *Optional<std::unique_ptr<int, ExpectingDeleter>>(
+ {new int(42), ExpectingDeleter{1337}});
+ *ptr = 1337;
+}
+
TEST(Optional, EmptyConstruct) {
Optional<int> opt;
EXPECT_FALSE(bool(opt));
// intended explicit operator bool, for if (opt).
bool b(mbool);
+ EXPECT_FALSE(b);
// Truthy tests work and are not ambiguous
if (mbool && mshort && mstr && mint) { // only checks not-empty
EXPECT_EQ(**optIntPtr, 3);
}
+#if __clang__
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wself-move"
+#endif
+
TEST(Optional, SelfAssignment) {
Optional<int> a = 42;
a = a;
ASSERT_TRUE(b.hasValue() && b.value() == 23333333);
}
+#if __clang__
+# pragma clang diagnostic pop
+#endif
+
class ContainsOptional {
public:
ContainsOptional() { }
}
}
+TEST(Optional, Exceptions) {
+ Optional<int> empty;
+ 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);
+}
}