From ab732202808e175eb6ae670687280b8f4dbaf1e8 Mon Sep 17 00:00:00 2001
From: William Carroll <wpcarro@gmail.com>
Date: Sat, 12 Dec 2020 01:31:51 +0000
Subject: [PATCH] Define Cache.{list,clear} to help debugging

Since I'm often using `iex` for interactive development, these functions are
useful.
---
 assessments/semiprimes/server/lib/cache.ex | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/assessments/semiprimes/server/lib/cache.ex b/assessments/semiprimes/server/lib/cache.ex
index 334bf901b..cd064cc1a 100644
--- a/assessments/semiprimes/server/lib/cache.ex
+++ b/assessments/semiprimes/server/lib/cache.ex
@@ -24,4 +24,18 @@ defmodule Cache do
   def put(key, value) do
     Agent.update(__MODULE__, &Map.put(&1, key, value))
   end
+
+  @doc """
+  List the contents of the cache. Useful for debugging purposes.
+  """
+  def list() do
+    Agent.get(__MODULE__, & &1)
+  end
+
+  @doc """
+  Invalidate the entire cache.
+  """
+  def clear() do
+    Agent.update(__MODULE__, fn _ -> %{} end)
+  end
 end