Package org.hamcrest.collection
Class IsEmptyCollection<E>
- java.lang.Object
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- org.hamcrest.BaseMatcher<T>
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- org.hamcrest.TypeSafeMatcher<java.util.Collection<? extends E>>
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- org.hamcrest.collection.IsEmptyCollection<E>
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- All Implemented Interfaces:
Matcher<java.util.Collection<? extends E>>
,SelfDescribing
public class IsEmptyCollection<E> extends TypeSafeMatcher<java.util.Collection<? extends E>>
Tests if collection is empty.
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Constructor Summary
Constructors Constructor Description IsEmptyCollection()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description void
describeMismatchSafely(java.util.Collection<? extends E> item, Description mismatchDescription)
Subclasses should override this.void
describeTo(Description description)
Generates a description of the object.static <E> Matcher<java.util.Collection<? extends E>>
empty()
Creates a matcher forCollection
s matching examined collections whoseisEmpty
method returnstrue
.static <E> Matcher<java.util.Collection<E>>
emptyCollectionOf(java.lang.Class<E> type)
Creates a matcher forCollection
s matching examined collections whoseisEmpty
method returnstrue
.boolean
matchesSafely(java.util.Collection<? extends E> item)
Subclasses should implement this.-
Methods inherited from class org.hamcrest.TypeSafeMatcher
describeMismatch, matches
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Methods inherited from class org.hamcrest.BaseMatcher
_dont_implement_Matcher___instead_extend_BaseMatcher_, toString
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Method Detail
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matchesSafely
public boolean matchesSafely(java.util.Collection<? extends E> item)
Description copied from class:TypeSafeMatcher
Subclasses should implement this. The item will already have been checked for the specific type and will never be null.- Specified by:
matchesSafely
in classTypeSafeMatcher<java.util.Collection<? extends E>>
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describeMismatchSafely
public void describeMismatchSafely(java.util.Collection<? extends E> item, Description mismatchDescription)
Description copied from class:TypeSafeMatcher
Subclasses should override this. The item will already have been checked for the specific type and will never be null.- Overrides:
describeMismatchSafely
in classTypeSafeMatcher<java.util.Collection<? extends E>>
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describeTo
public void describeTo(Description description)
Description copied from interface:SelfDescribing
Generates a description of the object. The description may be part of a 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.
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empty
public static <E> Matcher<java.util.Collection<? extends E>> empty()
Creates a matcher forCollection
s matching examined collections whoseisEmpty
method returnstrue
. For example:assertThat(new ArrayList<String>(), is(empty()))
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emptyCollectionOf
public static <E> Matcher<java.util.Collection<E>> emptyCollectionOf(java.lang.Class<E> type)
Creates a matcher forCollection
s matching examined collections whoseisEmpty
method returnstrue
. For example:assertThat(new ArrayList<String>(), is(emptyCollectionOf(String.class)))
- Parameters:
type
- the type of the collection's content
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