Board b{{16,14,9,13,3,1,12,8,16,11,6,4,7,5,2,10}};
EXPECT_THROW(b.hole(), std::runtime_error);
}
+
+TEST(Board, ZeroDistance) {
+ Board b{{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,0}};
+ EXPECT_EQ(0, b.distance(b));
+}
+
+TEST(Board, DistanceAdjacentTilesFlipped) {
+ Board b1{{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,0}};
+ Board b2{{2,1,3,4,5,6,7,8,9,10,11,12,13,14,15,0}};
+ EXPECT_EQ(2, b1.distance(b2));
+}
+
+TEST(Board, DistanceOneMoveRemaining) {
+ Board b1{{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,0}};
+ Board b2{{1,2,3,4,5,6,7,8,9,10,11,12,13,14,0,15}};
+ EXPECT_EQ(2, b1.distance(b2));
+}
+
+TEST(Board, DistanceCornersSwapped) {
+ Board b1{{0,2,3,13,5,6,7,8,9,10,11,12,4,14,15,1}};
+ Board b2{{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,0}};
+ EXPECT_EQ(24, b1.distance(b2));
+}
+
+TEST(Board, MaxDistance) {
+ Board b1{{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,0}};
+ Board b2{{0,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1}};
+ EXPECT_EQ(64, b1.distance(b2));
+}