Some custom exception matchers for hamcrest

ExceptionMatchers.java

import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.hamcrest.Matcher;

/**
 * Hamcrest matchers for exceptions
 */
public class ExceptionMatchers {


    public static Matcher<? super Exception> hasMessage(final String msg) {
        return new BaseMatcher<Exception>() {
            @Override
            public boolean matches(Object item) {
                return ((Exception) item).getMessage().equals(msg);
            }

            @Override
            public void describeTo(Description description) {
                description.appendText("expecting exception message: " + msg);
            }
        };
    }

    public static Matcher<? super Exception> hasCause(final Throwable cause) {
        return new BaseMatcher<Exception>() {
            @Override
            public boolean matches(Object item) {
                Exception other = (Exception) item;
                if (other.getCause() == null) {
                    return false;
                }
                return other.getCause().equals(cause);
            }

            @Override
            public void describeTo(Description description) {
                description.appendText("expected cause throwable: " + cause);
            }

            @Override
            public void describeMismatch(Object item, Description description) {
                description.appendText("but was throwable: " + ((Exception) item).getCause());
            }
        };
    }


}