1 package org.hamcrest.core; 2 3 import org.hamcrest.Matcher; 4 import org.junit.Test; 5 6 import static org.hamcrest.AbstractMatcherTest.*; 7 import static org.hamcrest.core.Is.is; 8 import static org.hamcrest.core.Is.isA; 9 import static org.hamcrest.core.IsEqual.equalTo; 10 11 public final class IsTest { 12 13 @Test public void 14 copesWithNullsAndUnknownTypes() { 15 Matcher<String> matcher = is("something"); 16 17 assertNullSafe(matcher); 18 assertUnknownTypeSafe(matcher); 19 } 20 21 @Test public void 22 matchesTheSameWayTheUnderlyingMatcherDoes() { 23 final Matcher<Boolean> matcher = is(equalTo(true)); 24 25 assertMatches(matcher, true); 26 assertDoesNotMatch(matcher, false); 27 } 28 29 @Test public void 30 generatesIsPrefixInDescription() { 31 assertDescription("is <true>", is(equalTo(true))); 32 assertDescription("is \"A\"", is("A")); 33 } 34 35 @Test public void 36 providesConvenientShortcutForIsEqualTo() { 37 final Matcher<String> matcher = is("A"); 38 39 assertMatches(matcher, "A"); 40 assertDoesNotMatch(is("A"), "B"); 41 } 42 43 @SuppressWarnings({ "unchecked", "rawtypes" }) 44 @Test public void 45 providesConvenientShortcutForIsInstanceOf() { 46 final Matcher matcher = isA(Integer.class); 47 assertMatches(matcher, 1); 48 assertDoesNotMatch(matcher, new Object()); 49 assertDoesNotMatch(matcher, null); 50 } 51 } 52
