func TestInsert(t *testing.T) {
var ll linkedlist.LinkedList
ll.Insert(1)
ll.Insert("2")
}
func TestContains(t *testing.T) {
var ll linkedlist.LinkedList
if ll.Contains(1) {
t.Fatal("List should be empty")
}
ll.Insert(1)
if !ll.Contains(1) {
t.Fatal("List should contain element")
}
ll.Insert("2")
ll.Insert(3)
if !ll.Contains(1) {
t.Fatal("List should contain element")
}
if !ll.Contains("2") {
t.Fatal("List should contain element")
}
if !ll.Contains(3) {
t.Fatal("List should contain element")
}
if ll.Contains(4) {
t.Fatal("List should not contain element")
}
}