Package org.hamcrest.number

Class IsNaN

java.lang.Object
org.hamcrest.BaseMatcher<Double>
org.hamcrest.TypeSafeMatcher<Double>
org.hamcrest.number.IsNaN
All Implemented Interfaces:
Matcher<Double>, SelfDescribing
public final class IsNaN extends TypeSafeMatcher<Double>
Is the value a number actually not a number (NaN)?

  • Method Details

    • matchesSafely

      public boolean matchesSafely(Double item)
      Description copied from class: TypeSafeMatcher
      Check if the item matches. The item will already have been checked for the specific type and will never be null. Subclasses should implement this.
      Specified by:
      matchesSafely in class TypeSafeMatcher<Double>
      Parameters:
      item - the type safe item to match against.
      Returns:
      boolean true/false depending if item matches matcher.

    • describeMismatchSafely

      public void describeMismatchSafely(Double item, Description mismatchDescription)
      Description copied from class: TypeSafeMatcher
      Describe the mismatch. The item will already have been checked for the specific type and will never be null. Subclasses should override this.
      Overrides:
      describeMismatchSafely in class TypeSafeMatcher<Double>
      Parameters:
      item - the type safe item to match against.
      mismatchDescription - the mismatch description.

    • describeTo

      public 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.

    • notANumber

      public static Matcher<Double> notANumber()
      Creates a matcher of Doubles that matches when an examined double is not a number. For example: 
      assertThat(Double.NaN, is(notANumber()))
      Returns:
      The matcher.