if _, ok := rooms["#bar"]; !ok {
t.Fatal("#bar does not exist")
}
if _, ok := rooms["#baz"]; !ok {
t.Fatal("#baz does not exist")
}
if _, ok := rooms["#bar"]; !ok {
t.Fatal("#bar does not exist")
}
if _, ok := rooms["#baz"]; !ok {
t.Fatal("#baz does not exist")
}