public void Concatenation()
{
foreach (var r1 in someRopes)
{
foreach (var r2 in someRopes)
{
foreach (var r3 in someRopes)
{
Rope c1 = Rope.Concat(r1, Rope.Concat(r2, r3));
Rope c2 = Rope.Concat(Rope.Concat(r1, r2), r3);
Assert.Equal(c1, c2); // associative
Assert.Equal(c1.GetHashCode(), c2.GetHashCode());
string s = r1.ToString() + r2.ToString() + r3.ToString();
Assert.Equal(c1.ToString(), s);
Assert.Equal(c2.ToString(), s);
Rope c3 = Rope.ForString(s);
Assert.Equal(c1.GetHashCode(), c3.GetHashCode());
Assert.Equal(c1, c3);
Assert.Equal(c2, c3);
Assert.Equal(c3.ToString(), s);
}
}
}
}
public override int GetHashCode() => Hash.Combine(base.GetHashCode(), _value.GetHashCode());