com.hotels.styx.common.testing.matcher

Class TransformingMatcher<E,R>

java.lang.Object

org.hamcrest.BaseMatcher<T>

org.hamcrest.TypeSafeMatcher<E>

com.hotels.styx.common.testing.matcher.TransformingMatcher<E,R>

Type Parameters:

E - type to match against

R - post-transformation type of delegate matcher

All Implemented Interfaces:

org.hamcrest.Matcher<E>, org.hamcrest.SelfDescribing

public class TransformingMatcher<E,R>
extends org.hamcrest.TypeSafeMatcher<E>

A matcher that transforms a value and then applies another matcher to it when used.

The advantage of this over transforming the value inside the test code is that it can be re-used while maintaining the familiar syntax of hamcrest assertThat.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TransformingMatcher(Function<E,R> transformation, org.hamcrest.Matcher<R> matcher)

Method Summary

Modifier and Type	Method and Description
protected void	describeMismatchSafely(E item, org.hamcrest.Description mismatchDescription)
void	describeTo(org.hamcrest.Description description)
static <E,R> TransformingMatcher<E,R>	hasDerivedValue(Function<E,R> transformation, org.hamcrest.Matcher<R> matcher)
protected boolean	matchesSafely(E e)

Methods inherited from class org.hamcrest.TypeSafeMatcher

describeMismatch, matches

Methods inherited from class org.hamcrest.BaseMatcher

_dont_implement_Matcher___instead_extend_BaseMatcher_, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

TransformingMatcher

protected TransformingMatcher(Function<E,R> transformation,
                              org.hamcrest.Matcher<R> matcher)

Method Detail

hasDerivedValue

public static <E,R> TransformingMatcher<E,R> hasDerivedValue(Function<E,R> transformation,
                                                             org.hamcrest.Matcher<R> matcher)

matchesSafely

protected boolean matchesSafely(E e)

Specified by:

matchesSafely in class org.hamcrest.TypeSafeMatcher<E>

describeTo

public void describeTo(org.hamcrest.Description description)

describeMismatchSafely

protected void describeMismatchSafely(E item,
                                      org.hamcrest.Description mismatchDescription)

Overrides:

describeMismatchSafely in class org.hamcrest.TypeSafeMatcher<E>