public void IsFalse_OnUndefeatedNinja_ShouldSucceed() { // arrange var undefeatedNinja = new FightNinja(false); // act var result = undefeatedNinja.Evaluate(n => n.Member(x => x.defeated).IsFalse()); // assert result.ExAssert(r => r.Fullfills(true, "FightNinja: ( )defeated = False", "(expected: False)")); }