Macro assertables::assert_contains_as_result

source · 
macro_rules! assert_contains_as_result {
    ($container:expr, $containee:expr $(,)?) => { ... };
}
Expand description

Assert an expression (such as a string) contains an expression (such as a substring).

  • If true, return Result Ok(()).

  • Otherwise, return Result Err with a diagnostic message.

This macro provides the same statements as assert_contains, except this macro returns a Result, rather than doing a panic.

This macro is useful for runtime checks, such as checking parameters, or santizing inputs, or handling different results in different ways.