+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);
+}
+