Refactor and add securities controller

test/support/fixtures/instruments_fixtures.ex

@@ -0,0 +1,25 @@
+defmodule Tradex.InstrumentsFixtures do
+  @moduledoc """
+  This module defines test helpers for creating
+  entities via the `Tradex.Instruments` context.
+  """
+
+  @doc """
+  Generate a security.
+  """
+  def security_fixture(attrs \\ %{}) do
+    {:ok, security} =
+      attrs
+      |> Enum.into(%{
+        expiration_date: ~D[2025-01-27],
+        isin: "some isin",
+        name: "some name",
+        strike_price: "120.5",
+        ticker: "some ticker",
+        wkn: "some wkn"
+      })
+      |> Tradex.Instruments.create_security()
+
+    security
+  end
+end