1 package org.hamcrest.number; 2 3 import org.hamcrest.Matcher; 4 import org.junit.Test; 5 6 import static org.hamcrest.AbstractMatcherTest.*; 7 import static org.hamcrest.number.IsNaN.notANumber; 8 9 public final class IsNanTest { 10 11 @Test public void copesWithNullsAndUnknownTypes()12 copesWithNullsAndUnknownTypes() { 13 Matcher<Double> matcher = notANumber(); 14 15 assertNullSafe(matcher); 16 assertUnknownTypeSafe(matcher); 17 } 18 19 @Test public void matchesNaN()20 matchesNaN() { 21 assertMatches(notANumber(), Double.NaN); 22 } 23 24 @Test public void doesNotMatchDoubleValue()25 doesNotMatchDoubleValue() { 26 assertDoesNotMatch(notANumber(), 1.25); 27 } 28 29 @Test public void doesNotMatchInfinity()30 doesNotMatchInfinity() { 31 assertDoesNotMatch(notANumber(), Double.POSITIVE_INFINITY); 32 } 33 34 @Test public void describesItself()35 describesItself() { 36 assertDescription("a double value of NaN", notANumber()); 37 } 38 39 @Test public void describesAMismatch()40 describesAMismatch() { 41 assertMismatchDescription("was <1.25>", notANumber(), 1.25); 42 } 43 } 44