org.hamcrest.collection
Class IsEmptyCollection<E>

java.lang.Object
  org.hamcrest.BaseMatcher<T>
      org.hamcrest.TypeSafeMatcher<Collection<? extends E>>
          org.hamcrest.collection.IsEmptyCollection<E>

All Implemented Interfaces:

Matcher<Collection<? extends E>>, SelfDescribing

public class IsEmptyCollection<E>
extends TypeSafeMatcher<Collection<? extends E>>

Tests if collection is empty.

Constructor Summary

IsEmptyCollection()

Method Summary

void	describeMismatchSafely(Collection<? extends E> item, Description mismatchDescription)
void	describeTo(Description description)
static <E> Matcher<Collection<? extends E>>	empty() Creates a matcher for Collections matching examined collections whose isEmpty method returns true.
static <E> Matcher<Collection<E>>	emptyCollectionOf(Class<E> unusedToForceReturnType) Creates a matcher for Collections matching examined collections whose isEmpty method returns true.
boolean	matchesSafely(Collection<? extends E> item)

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

IsEmptyCollection

public IsEmptyCollection()

Method Detail

matchesSafely

public boolean matchesSafely(Collection<? extends E> item)

Specified by:

matchesSafely in class TypeSafeMatcher<Collection<? extends E>>

describeMismatchSafely

public void describeMismatchSafely(Collection<? extends E> item,
                                   Description mismatchDescription)

Overrides:

describeMismatchSafely in class TypeSafeMatcher<Collection<? extends E>>

describeTo

public void describeTo(Description description)

empty

public static <E> Matcher<Collection<? extends E>> empty()

Creates a matcher for Collections matching examined collections whose isEmpty method returns true.

For example:

assertThat(new ArrayList<String>(), is(empty()))

emptyCollectionOf

public static <E> Matcher<Collection<E>> emptyCollectionOf(Class<E> unusedToForceReturnType)

Creates a matcher for Collections matching examined collections whose isEmpty method returns true.

For example:

assertThat(new ArrayList<String>(), is(emptyCollectionOf(String.class)))

Parameters:

unusedToForceReturnType - the type of the collection's content