jtulach@378: package test;
jtulach@8: 
jtulach@379: import api.Contravariance;
jtulach@378: 
jtulach@379: public class ContravarianceTest {
jtulach@379:     // BEGIN: variance.contravariance.test
jtulach@378:     public static void main(String[] args) {
jtulach@379:         boolean positive = Contravariance.isPositive(10);
jtulach@379:         boolean negative = Contravariance.isPositive(-5);
jtulach@379:         System.err.println("positive = " + positive + " negative = " + negative);
jtulach@379:         assert positive : "10 is positive";
jtulach@379:         assert !negative : "-5 is negative";
jtulach@8:     }
jtulach@379:     // END: variance.contravariance.test
jtulach@8: }