Add bitboard test

Tests/BitBoardTest.cpp

@@ -0,0 +1,22 @@
+#include "catch2/catch.hpp"
+
+#include "TestUtils.hpp"
+
+#include "BitBoard.hpp"
+
+#include <set>
+#include <iostream>
+
+TEST_CASE("King attacks are correctly generated", "[Board][Fundamental]") {
+    auto board = BitBoard::fromIndex(G2);
+    board |= BitBoard::fromIndex(B7);
+
+    BitBoard ka = BitBoard::kingAttacks(board);
+    REQUIRE((ka == (
+            BitBoard::fromIndex(G1) | BitBoard::fromIndex(G3) | BitBoard::fromIndex(H1) | BitBoard::fromIndex(H2)
+                    | BitBoard::fromIndex(H3) | BitBoard::fromIndex(F1) | BitBoard::fromIndex(F2)
+                    | BitBoard::fromIndex(F3) |
+                    BitBoard::fromIndex(B8) | BitBoard::fromIndex(B6) | BitBoard::fromIndex(A6)
+                    | BitBoard::fromIndex(A7) | BitBoard::fromIndex(A8) | BitBoard::fromIndex(C6)
+                    | BitBoard::fromIndex(C7) | BitBoard::fromIndex(C8))));
+}