Struct googletest::matchers::PredicateMatcher

pub struct PredicateMatcher<T: ?Sized, P, D1, D2> { /* private fields */ }

A matcher which applies predicate on the value.

See predicate.

Implementations

impl<T, P> PredicateMatcher<T, P, NoDescription, NoDescription>

pub fn with_description<D1: PredicateDescription, D2: PredicateDescription>( self, positive_description: D1, negative_description: D2 ) -> PredicateMatcher<T, P, D1, D2>

Configures this instance to provide a more meaningful description.

For example, to make sure the error message is more useful

predicate(|x: &i32| x % 2 == 1)
    .with_description("is odd", "is even")

This is optional as it only provides value when the test fails.

Description can be passed by &str, String or Fn() -> Into<String>.

Trait Implementations

impl<T: Debug, P, D1: PredicateDescription, D2: PredicateDescription> Matcher for PredicateMatcher<T, P, D1, D2>

where for<'a> P: Fn(&'a T) -> bool,

type ActualT = T

The type against which this matcher matches.

fn matches(&self, actual: &T) -> MatcherResult

Returns whether the condition matches the datum actual.

fn describe(&self, result: MatcherResult) -> Description

Returns a description of self or a negative description if matcher_result is DoesNotMatch.

fn explain_match(&self, actual: &Self::ActualT) -> Description

Prepares a String describing how the expected value encoded in this instance matches or does not match the given value actual.

fn and<Right: Matcher<ActualT = Self::ActualT>>( self, right: Right ) -> ConjunctionMatcher<Self, Right>

where Self: Sized,

Constructs a matcher that matches both self and right.

fn or<Right: Matcher<ActualT = Self::ActualT>>( self, right: Right ) -> DisjunctionMatcher<Self, Right>

where Self: Sized,

Constructs a matcher that matches when at least one of self or right matches the input.