Module io.helidon.common.testing.junit5

Package io.helidon.common.testing.junit5

Class OptionalMatcher

java.lang.Object

io.helidon.common.testing.junit5.OptionalMatcher

public final class OptionalMatcher
extends Object

Hamcrest matchers for Optional.

Method Summary

Modifier and Type	Method	Description
static <T> org.hamcrest.Matcher<Optional<T>>	optionalEmpty()	A matcher for an Optional that checks it is empty.
static <T> org.hamcrest.Matcher<Optional<T>>	optionalPresent()	A matcher for an Optional that checks it is present.
static <T> org.hamcrest.Matcher<Optional<T>>	optionalValue(org.hamcrest.Matcher<? super T> matcher)	A matcher for an Optional that checks it is present, and that the value matches the provided matcher.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

optionalValue

public static <T> org.hamcrest.Matcher<Optional<T>> optionalValue(org.hamcrest.Matcher<? super T> matcher)

A matcher for an Optional that checks it is present, and that the value matches the provided matcher.

Usage example:

     assertThat(myOptional, optionalValue(is("expected")));
 

Type Parameters:

T - type of the value

Parameters:

matcher - matcher to validate the content of the optional

Returns:

matcher validating the Optional is present and matches the provided matcher

optionalEmpty

public static <T> org.hamcrest.Matcher<Optional<T>> optionalEmpty()

A matcher for an Optional that checks it is empty.

Usage example:

     assertThat(myOptional, optionalEmpty());
 

Type Parameters:

T - type of the optional

Returns:

matcher validating the Optional is empty

optionalPresent

public static <T> org.hamcrest.Matcher<Optional<T>> optionalPresent()

A matcher for an Optional that checks it is present.

Usage example:

     assertThat(myOptional, optionalPresent());
 

Type Parameters:

T - type of the value

Returns:

matcher validating the Optional is present