29 using StringExp = ftl::Expected<std::string, std::errc>;  typedef
38   EXPECT_TRUE(StringExp().has_value());  in TEST()
39   EXPECT_EQ(StringExp(), StringExp(""));  in TEST()
45   ASSERT_TRUE(StringExp("test").has_value());  in TEST()
46   EXPECT_EQ("test"s, StringExp("test").value());  in TEST()
49   const auto exp = StringExp(ftl::Unexpected(std::errc::invalid_argument));  in TEST()
58   EXPECT_TRUE(StringExp(ftl::Unexpected(std::errc::permission_denied)).has_error([](auto e) {  in TEST()
68     const StringExp exp("foo"s);  in TEST()
74     StringExp exp("foobar"s);  in TEST()
93 StringExp repeat_try(StringExp exp) {  in repeat_try()
95   return StringExp(str + str);  in repeat_try()
98 std::errc repeat_expect(StringExp exp, std::string& out) {  in repeat_expect()
117   EXPECT_EQ(StringExp("haha"s), repeat_try(StringExp("ha"s)));  in TEST()
139   EXPECT_EQ(std::errc::operation_in_progress, repeat_expect(StringExp("ha"s), str));  in TEST()