Matchers.java 文件源码

@Factory
public static Matcher<Throwable> hasMessage(final Matcher<String> matcher) {
    return new BaseMatcher<Throwable>() {
        public boolean matches(Object o) {
            Throwable t = (Throwable) o;
            return matcher.matches(t.getMessage());
        }

        public void describeTo(Description description) {
            description.appendText("an exception with message that is ").appendDescriptionOf(matcher);
        }
    };
}