public void IndexCollision_TryGetValue_ReturnsFalse()
{
TransposTable tt = new TransposTable(8);
TTEntry orig = new TTEntry(0x12_34_56_78_9A_BC_DE_F1, new Square(4, 5), 6, 7, TTFlag.Exact);
tt.Write(orig);
TTEntry returned;
bool retVal = tt.TryGetValue(0xFF_FF_FF_FF_9A_BC_DE_F1, out returned);
Assert.AreEqual(false, retVal);
}
public void FirstRecordOfAHashGetsReturned()
{
ulong hash = 0x12_34_56_78_9A_BC_DE_F1;
TransposTable tt = new TransposTable(8);
TTEntry orig = new TTEntry(hash, new Square(4, 5), 6, 7, TTFlag.Exact);
tt.Write(orig);
TTEntry returned;
bool retVal = tt.TryGetValue(hash, out returned);
Assert.AreEqual(true, retVal);
Assert.AreEqual(orig.Hash, returned.Hash);
Assert.AreEqual(orig.BestMove, returned.BestMove);
Assert.AreEqual(orig.Depth, returned.Depth);
Assert.AreEqual(orig.Score, returned.Score);
Assert.AreEqual(orig.Flag, returned.Flag);
}
public void IndexCollision_HigherDepth_Remains()
{
ulong hash1 = 0x12_34_56_78_9A_BC_DE_F1;
ulong hash2 = 0xFF_FF_FF_FF_9A_BC_DE_F1;
TransposTable tt = new TransposTable(8);
TTEntry orig = new TTEntry(hash1, new Square(4, 5), 6, 7, TTFlag.Exact);
tt.Write(orig);
TTEntry higherDepth = new TTEntry(hash2, new Square(4, 5), 60, 7, TTFlag.Exact);
tt.Write(higherDepth); //should overwrite
TTEntry returned;
bool retVal = tt.TryGetValue(hash2, out returned);
Assert.AreEqual(true, retVal);
tt.Write(orig); //should not overwrite
retVal = tt.TryGetValue(hash2, out returned);
Assert.AreEqual(true, retVal);
}
