pub fn err<Inner>(inner: Inner) -> ErrMatcher<Inner>Expand description
Matches a Result containing Err with a value matched by inner.
verify_that!(Err::<(), _>("Some error"), err(eq("Some error")))?; // Passes
verify_that!(Ok::<_, &str>("A value"), err(eq("A value")))?; // Fails
verify_that!(Err::<(), _>("Some error"), err(eq("Some other error")))?; // Fails