is_null() [8/24]

template<typename optional_t >

static void xtd::tunit::valid::is_null ( const std::optional< optional_t > &  opt, const xtd::string &  message, const xtd::diagnostics::stack_frame &  stack_frame  )

inlinestatic

Validates that the optional is std::nullopt.

Parameters

opt	The optional to check is std::nullopt.
message	A user message to display if the assertion fails. This message can be seen in the unit test results.
stack_frame	Contains information about current file and current line.

Examples

std::optional<std::string> s1;
std::optional<std::string> s2 = "Anything";
xtd::tunit::valid::is_null(s1, "User message...", csf_); // test ok.
xtd::tunit::valid::is_null(s2, "User message...", csf_); // test fails.