private void StrictSetDisjoint <S1, S2>() where S1 : IStrictSet <int>, new() where S2 : IStrictSet <int>, new()
{
var s1 = new S1();
var s2 = new S2();
Fill(s1, 0, 1000);
Fill(s2, 1000, 2000);
Assert.True(s1.IsDisjointWith(s2));
var s3 = new S1();
var s4 = new S2();
Fill(s3, 0, 2000);
Fill(s4, 1000, 2000);
Assert.False(s3.IsDisjointWith(s4));
var s5 = new S1();
var s6 = new S2();
Assert.True(s5.IsDisjointWith(s6));
var s7 = new S1();
var s8 = new S2();
Fill(s7, 0, 1000);
Assert.True(s7.IsDisjointWith(s8));
Assert.True(s8.IsDisjointWith(s7));
}