#include <folly/Optional.h>
#include <folly/Portability.h>
+#include <folly/portability/GMock.h>
#include <folly/portability/GTest.h>
#include <algorithm>
EXPECT_FALSE(x);
}
+TEST(Optional, Emplace) {
+ Optional<std::vector<int>> opt;
+ auto& values1 = opt.emplace(3, 4);
+ EXPECT_THAT(values1, testing::ElementsAre(4, 4, 4));
+ auto& values2 = opt.emplace(2, 5);
+ EXPECT_THAT(values2, testing::ElementsAre(5, 5));
+}
+
+TEST(Optional, EmplaceInitializerList) {
+ Optional<std::vector<int>> opt;
+ auto& values1 = opt.emplace({3, 4, 5});
+ EXPECT_THAT(values1, testing::ElementsAre(3, 4, 5));
+ auto& values2 = opt.emplace({4, 5, 6});
+ EXPECT_THAT(values2, testing::ElementsAre(4, 5, 6));
+}
+
+TEST(Optional, Reset) {
+ Optional<int> opt(3);
+ opt.reset();
+ EXPECT_FALSE(opt);
+}
+
TEST(Optional, String) {
Optional<std::string> maybeString;
EXPECT_FALSE(maybeString);
EXPECT_EQ("bye", a.value());
swap(a, b);
+ EXPECT_TRUE(a.hasValue());
+ EXPECT_TRUE(b.hasValue());
+ EXPECT_EQ("hello", a.value());
+ EXPECT_EQ("bye", b.value());
}
TEST(Optional, Comparisons) {