# testing_generic.ludic — a test block is checked like `entry`, so a generic function called from
# one is made real for its type arguments there, as it is from any function. Its runner prints:
#   == 2 passed, 0 failed ==
program TestingGeneric {
  property Box<T> { items: []T = null }
  function box_new<T>() -> Box<T> {
    let b = new Box<T>
    b.items = new []T
    return b
  }
  function box_push<T>(b: Box<T>, v: T) -> void {
    push(b.items, v)
  }
  test "a generic call in a test" {
    let b: Box<int> = box_new()
    box_push(b, 4)
    box_push(b, 5)
    expect_eq(len(b.items), 2)
  }
  test "another instance of it" {
    let b: Box<string> = box_new()
    box_push(b, "trout")
    expect(b.items[0] == "trout")
  }
}