Add a generator for Link with random shorten.

lib/link_shortener/generators/link_with_random_shorten.ex

@@ -0,0 +1,14 @@
+defmodule LinkShortener.Generators.LinkWithRandomShorten do
+  @moduledoc """
+  This module provides a generator for Link.
+  """
+
+  alias LinkShortener.Generators.SafeString
+
+  @doc """
+  Generate a Link with random shorten with the length.
+  """
+  def generate_one(attrs, length \\ 10, generator \\ &SafeString.generate/1) do
+    Map.put(attrs, :shorten, generator.(length))
+  end
+end