IsBefore.java

package com.spencerwi.hamcrestJDK8Time.matchers;

import org.hamcrest.Description;
import org.hamcrest.Factory;
import org.hamcrest.TypeSafeMatcher;

import java.time.temporal.Temporal;

public class IsBefore<T extends Temporal & Comparable<T>> extends TypeSafeMatcher<T> {
    private T other;

    public IsBefore(T other) { this.other = other; }

    @Override
    protected boolean matchesSafely(T item) {
        return item.compareTo(other) < 0;
    }

    @Override
    public void describeTo(Description description) {
        description
                .appendText("a " + other.getClass().getSimpleName() + " that is before ")
                .appendValue(other);
    }

    @Factory
    public static <T extends Temporal & Comparable<T>> IsBefore<T> before(T other){ return new IsBefore<>(other); }
}