org.hamcrest.number

Class IsNaN

java.lang.Object

org.hamcrest.BaseMatcher<T>

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 Summary

Modifier and Type	Method and Description
void	describeMismatchSafely(Double item, Description mismatchDescription) Subclasses should override this.
void	describeTo(Description description) Generates a description of the object.
boolean	matchesSafely(Double item) Subclasses should implement this.
static Matcher<Double>	notANumber() Creates a matcher of Doubles that matches when an examined double is not a number.

Methods inherited from class org.hamcrest.TypeSafeMatcher

describeMismatch, matches

Methods inherited from class org.hamcrest.BaseMatcher

_dont_implement_Matcher___instead_extend_BaseMatcher_, isNotNull, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

matchesSafely

public boolean matchesSafely(Double 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<Double>

describeMismatchSafely

public void describeMismatchSafely(Double 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<Double>

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.

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()))