Matchers.java 文件源码

public static <T> Matcher<T> hasFieldWithUserRef(final String fieldName, final User user) {
    return new BaseMatcher<T>() {
        @Override
        public boolean matches(Object o) {
            Ref<User> userRef = TestSupport.getField(o, fieldName);
            if (user == null) {
                return userRef == null;
            } else {
                String username = userRef.getKey().getName();

                return user.getUsername().equals(username);
            }
        }

        @Override
        public void describeTo(Description description) {
            description.appendText(String.format("User with username '%s' on field %s", user, fieldName));
        }
    };
}