Package org.hamcrest.collection

Class IsEmptyCollection<E>

java.lang.Object
org.hamcrest.BaseMatcher<Collection<? extends E>>
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 Details

    • IsEmptyCollection

      public IsEmptyCollection()

  • Method Details

    • matchesSafely

      public boolean matchesSafely(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 class TypeSafeMatcher<Collection<? extends E>>

    • describeMismatchSafely

      public void describeMismatchSafely(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 class TypeSafeMatcher<Collection<? extends E>>

    • 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.

    • 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