Package org.hamcrest.collection
Class IsEmptyCollection<E>
- All Implemented Interfaces:
Matcher<Collection<? extends E>>
,SelfDescribing
Tests if collection is empty.
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
describeMismatchSafely
(Collection<? extends E> item, Description mismatchDescription) Subclasses should override this.void
describeTo
(Description description) Generates a description of the object.static <E> Matcher<Collection<? extends E>>
empty()
static <E> Matcher<Collection<E>>
emptyCollectionOf
(Class<E> unusedToForceReturnType) boolean
matchesSafely
(Collection<? extends E> item) Subclasses should implement this.Methods inherited from class org.hamcrest.TypeSafeMatcher
describeMismatch, matches
Methods inherited from class org.hamcrest.BaseMatcher
_dont_implement_Matcher___instead_extend_BaseMatcher_, isNotNull, toString
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Constructor Details
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IsEmptyCollection
public IsEmptyCollection()
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Method Details
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matchesSafely
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<Collection<? extends E>>
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describeMismatchSafely
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<Collection<? extends E>>
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describeTo
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
Creates a matcher forCollection
s matching examined collections whoseisEmpty
method returnstrue
. For example:assertThat(new ArrayList<String>(), is(empty()))
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emptyCollectionOf
Creates a matcher forCollection
s matching examined collections whoseisEmpty
method returnstrue
. For example:assertThat(new ArrayList<String>(), is(emptyCollectionOf(String.class)))
- Parameters:
unusedToForceReturnType
- the type of the collection's content
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