public void CompareToNaiveTest([Range(0, 30)] int n)
{
var y = "";
bool SimpleQuery(Monoid x) => x.Value.Length <= y.Length;
var oracle = new Oracle();
var st = new SegmentTree <Monoid>(n, oracle);
Assert.That(st.Length, Is.EqualTo(n));
var stn = new SegmentTreeNaive <Monoid>(n, oracle);
for (var i = 0; i < n; i++)
{
var s = new Monoid($"a{i}");
st.Set(i, s);
stn.Set(i, s);
}
for (var i = 0; i < n; i++)
{
Assert.That(st.Get(i), Is.EqualTo(stn.Get(i)));
}
for (var l = 0; l <= n; l++)
{
for (var r = l; r <= n; r++)
{
Assert.That(st.Query(l, r), Is.EqualTo(stn.Query(l, r)));
}
}
for (var l = 0; l <= n; l++)
{
for (var r = l; r <= n; r++)
{
y = st.Query(l, r).Value;
Assert.That(st.MaxRight(l, SimpleQuery), Is.EqualTo(stn.MaxRight(l, SimpleQuery)));
Assert.That(st.MaxRight(l, SimpleQuery),
Is.EqualTo(stn.MaxRight(l, x => x.Value.Length <= y.Length)));
}
}
for (var r = 0; r <= n; r++)
{
for (var l = 0; l <= r; l++)
{
y = st.Query(l, r).Value;
Assert.That(st.MinLeft(r, SimpleQuery), Is.EqualTo(stn.MinLeft(r, SimpleQuery)));
Assert.That(st.MinLeft(r, SimpleQuery),
Is.EqualTo(stn.MinLeft(r, x => x.Value.Length <= y.Length)));
}
}
}
public void EmptyTest()
{
var oracle = new Oracle();
var st = new SegmentTree <Monoid>(0, new Oracle());
Assert.That(st.Length, Is.Zero);
Assert.That(st.QueryToAll(), Is.EqualTo(oracle.MonoidIdentity));
st = new SegmentTree <Monoid>(new Monoid[] { }, new Oracle());
Assert.That(st.Length, Is.Zero);
Assert.That(st.QueryToAll(), Is.EqualTo(oracle.MonoidIdentity));
}
public void OneTest()
{
var oracle = new Oracle();
var identity = oracle.MonoidIdentity;
var st = new SegmentTree <Monoid>(1, oracle);
Assert.That(st.Length, Is.EqualTo(1));
Assert.That(st.QueryToAll(), Is.EqualTo(identity));
Assert.That(st.Get(0), Is.EqualTo(identity));
Assert.That(st.Query(0, 1), Is.EqualTo(identity));
var expected = new Monoid("dummy");
st.Set(0, expected);
Assert.That(st.Get(0), Is.EqualTo(expected));
Assert.That(st.Query(0, 0), Is.EqualTo(identity));
Assert.That(st.Query(0, 1), Is.EqualTo(expected));
Assert.That(st.Query(1, 1), Is.EqualTo(identity));
}