Struct xpct::matchers::Expectation

pub struct Expectation<Actual> {
    pub actual: Actual,
}

A value that is returned by matchers when the actual value doesn’t meet some criteria.

This is meant to be a deliberately generic value that can be reused in a number of different matchers and formatted with ExpectationFormat.

This can be used for matchers like be_some and be_ok to represent a value not meeting some criteria, such as not being Some(_) and not being Ok(_) respectively.

Use this over Mismatch when there’s only one case in which the matcher could fail.

When returned by a matcher, this value just means, “here is the actual value.” It’s up to the formatter to determine how that information is presented to the user.

Fields

actual: Actual

The actual value.

Trait Implementations

impl<Actual: Clone> Clone for Expectation<Actual>

fn clone(&self) -> Expectation<Actual>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Actual: Debug> Debug for Expectation<Actual>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Actual: PartialEq> PartialEq<Expectation<Actual>> for Expectation<Actual>

fn eq(&self, other: &Expectation<Actual>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<Actual: Eq> Eq for Expectation<Actual>

impl<Actual> StructuralEq for Expectation<Actual>

impl<Actual> StructuralPartialEq for Expectation<Actual>