mvn test -Dtest=MatcherTest -Dconcurrency=1 -DtrimStackTrace=false

package hudson.plugins.promoted_builds;

import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.junit.Test;

import static org.junit.Assert.assertThat;

public class MatcherTest {
    @Test
    public void test() throws Throwable {
        // object to perform assertion against
        final Object actual = new Object();
        assertThat(actual, new BaseMatcher() {
            @Override
            public void describeTo(Description description) {
                description.appendText("custom description");
            }
            @Override
            public boolean matches(Object item) {
                // for demonstration purpose
                return false;
            }
        });
    }
}