/** Test method to check for the manhattan distance between two coordinates. */
@Test
public void testManhattanDistance() {
assertEquals(
"Return the manhattan distance, should return 3",
3,
PathNode.manhattanDistance(coords1, coords2));
}
/** Method to test getFCost accessor method, which returns the sum of gCost & hCost. */
@Test
public void testGetFCost() {
PathNode nodeTest = new PathNode(coords1, node2, coords3, 10);
int fCost = PathNode.manhattanDistance(coords1, coords3) + 10;
assertEquals("gCost + hCost = fCost", fCost, nodeTest.getFCost());
}