Trait OptionAssertions 

pub trait OptionAssertions<T> {
    // Required methods
    fn is_some(self) -> Self;
    fn is_none(self) -> Self;
    fn to_value_ref(&self) -> AssertThat<&T>;
}

An extension trait to be used on the output of assert_that with Option argument. All assertions here work for references to Options as well.

Examples:

use kernal::prelude::*;

assert_that!(Some(2 + 3)).is_some().to_value_ref().is_equal_to(&5);
assert_that!(None::<u32>).is_none();

Required Methods

fn is_some(self) -> Self

Asserts that the tested option is a Some variant with any value, i.e. that Option::is_some is true.

fn is_none(self) -> Self

Asserts that the tested option is a None variant, i.e. that Option::is_none is true.

fn to_value_ref(&self) -> AssertThat<&T>

Asserts that the tested option is a Some variant and converts this asserter to one for a reference to the contained value, so chained assertions can be run on the unwrapped value.

If you are asserting over an owned Option, use OwnedOptionAssertions::to_value to obtain an asserter over the owned value.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T: Debug, O: Borrow<Option<T>>> OptionAssertions<T> for AssertThat<O>