Add perft testing

test/test_perft.py

@@ -0,0 +1,33 @@
+from test.base import ChessLibTestBase
+from test.chess_ffi import Board, perft
+
+
+class TestPerft(ChessLibTestBase):
+    def test_start_position(self):
+        b = Board()
+        self.load_fen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1", board=b)
+        expected = {
+            1: 20,
+            2: 400,
+            3: 8902,
+            #4: 197281,
+            # 5: 4865609,
+            # 6: 119060324
+        }
+        for d, want in expected.items():
+            got = int(perft(b, d))
+            self.assertEqual(got, want, f"perft({d}) start pos")
+
+    """
+    def test_kiwipete(self):
+        b = Board()
+        self.load_fen("r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 1", board=b)
+        expected = {
+            1: 48,
+            2: 2039,
+            3: 97862
+        }
+        for d, want in expected.items():
+            got = int(perft(b, d))
+            self.assertEqual(got, want, f"perft({d}) kiwipete")
+    """