Class FeatureMatcher<T,U>

java.lang.Object

org.hamcrest.BaseMatcher<T>

org.hamcrest.TypeSafeDiagnosingMatcher<T>

org.hamcrest.FeatureMatcher<T,U>

Type Parameters:

T - The type of the object to be matched

U - The type of the feature to be matched

All Implemented Interfaces:

Matcher<T>, SelfDescribing

Direct Known Subclasses:

CharSequenceLength, HasToString, IsArrayWithSize, IsCollectionWithSize, IsIterableWithSize, IsMapWithSize

public abstract class FeatureMatcher<T,U>
extends TypeSafeDiagnosingMatcher<T>

Supporting class for matching a feature of an object. Implement featureValueOf() in a subclass to pull out the feature to be matched against.

Constructor Summary

Constructors

Constructor	Description
FeatureMatcher(Matcher<? super U> subMatcher, String featureDescription, String featureName)	Constructor

Method Summary

Modifier and Type	Method	Description
final void	describeTo(Description description)	Generates a description of the object.
protected abstract U	featureValueOf(T actual)	Implement this to extract the interesting feature.
protected boolean	matchesSafely(T actual, Description mismatch)	Subclasses should implement this.

Methods inherited from class TypeSafeDiagnosingMatcher

describeMismatch, matches

Methods inherited from class BaseMatcher

_dont_implement_Matcher___instead_extend_BaseMatcher_, isNotNull, toString

Methods inherited from class Object

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

Constructor Details

FeatureMatcher

public FeatureMatcher(Matcher<? super U> subMatcher,
 String featureDescription,
 String featureName)

Constructor

Parameters:

subMatcher - The matcher to apply to the feature

featureDescription - Descriptive text to use in describeTo

featureName - Identifying text for mismatch message

Method Details

featureValueOf

protected abstract U featureValueOf(T actual)

Implement this to extract the interesting feature.

Parameters:

actual - the target object

Returns:

the feature to be matched

matchesSafely

protected boolean matchesSafely(T actual,
 Description mismatch)

Description copied from class: TypeSafeDiagnosingMatcher

Subclasses should implement this. The item will already have been checked for the specific type and will never be null.

Specified by:

matchesSafely in class TypeSafeDiagnosingMatcher<T>

Parameters:

actual - the item.

mismatch - the mismatch description.

Returns:

boolean true/false depending if item matches matcher.

describeTo

public final void describeTo(Description description)

Description copied from interface: SelfDescribing

Generates a description of the object. The description may be part of a description of a larger object of which this is just a component, so it should be worded appropriately.

Parameters:

description - The description to be built or appended to.