| /* Copyright (c) 2000-2006 hamcrest.org |
| */ |
| package org.hamcrest.core; |
| |
| import static org.hamcrest.core.IsEqual.equalTo; |
| import org.hamcrest.Description; |
| import org.hamcrest.Matcher; |
| import org.hamcrest.Factory; |
| import org.hamcrest.BaseMatcher; |
| |
| |
| /** |
| * Calculates the logical negation of a matcher. |
| */ |
| public class IsNot<T> extends BaseMatcher<T> { |
| private final Matcher<T> matcher; |
| |
| public IsNot(Matcher<T> matcher) { |
| this.matcher = matcher; |
| } |
| |
| public boolean matches(Object arg) { |
| return !matcher.matches(arg); |
| } |
| |
| public void describeTo(Description description) { |
| description.appendText("not ").appendDescriptionOf(matcher); |
| } |
| |
| /** |
| * Inverts the rule. |
| */ |
| @Factory |
| public static <T> Matcher<T> not(Matcher<T> matcher) { |
| return new IsNot<T>(matcher); |
| } |
| |
| /** |
| * This is a shortcut to the frequently used not(equalTo(x)). |
| * |
| * eg. assertThat(cheese, is(not(equalTo(smelly)))) |
| * vs assertThat(cheese, is(not(smelly))) |
| */ |
| @Factory |
| public static <T> Matcher<T> not(T value) { |
| return not(equalTo(value)); |
| } |
| |
| } |