Test setups

[richpjames]

          Can we test that this transition doesn't occur there are still multiple players when a player leaves?

Perhaps this can go in a beforeEach for the entire MultiplePlayers block:

const actor = interpret(lobbyMachine);
actor.start();

actor.send({
  type: "playerJoins",
  player: { socketId: "id", name: "a name" },
});
actor.send({
  type: "playerJoins",
  player: { socketId: "id-2", name: "a name 2" },
});
expect(actor.getSnapshot().value).toBe("MultiplePlayers")
// another assertion that context.players.length === 2

This test could be transitions to the OnePlayer state if there are only two players and it receives a player leaves event, and the other test does not transition to the OnePlayer state if there are more than two players and it receives a player leaves event

Originally posted by @yndajas in #25 (comment)

[richpjames]

This doesn't feel as relevant as it was when we created it so I'm going to close, but we can reopen if neccessary