public void GetClaimWithoutIntersections() { var claim1 = new Day03.Claim("#1 @ 1,3: 4x4"); var claim2 = new Day03.Claim("#2 @ 3,1: 4x4"); var claim3 = new Day03.Claim("#3 @ 5,5: 2x2"); var list = new List <Day03.Claim> { claim1, claim2, claim3 }; var sut = new Day03(); var result = sut.GetClaimsWithoutIntersections(list).First(); result.Id.Should().Be("#3"); }