Fix tests & add ConcurrentLimiter.delete/1

lib/concurrent_limiter.ex

@@ -73,9 +73,20 @@ defmodule ConcurrentLimiter do
     end
   end
 
+  @spec delete(name) :: :ok when name: atom()
+  @doc "Deletes a limiter."
+  def delete(name) do
+    if defined?(name) do
+      :persistent_term.put(name, nil)
+    end
+
+    :ok
+  end
+
   @doc "Limits invocation of `fun`."
-  @spec limit(atom(), function(), opts) :: {:error, :overload} | any()
-        when opts: [option],
+  @spec limit(name, function(), opts) :: {:error, :overload} | any()
+        when name: atom(),
+             opts: [option],
              option: {:wait, non_neg_integer()} | {:max_retries, non_neg_integer()}
   def limit(name, fun, opts \\ []) do
     do_limit(prefix_name(name), fun, opts, 0)

test/concurrent_limiter_test.exs

@@ -11,11 +11,11 @@ defmodule ConcurrentLimiterTest do
     ConcurrentLimiter.new(name, 2, 2)
     self = self()
 
-    spawn_link(fn -> sleepy(name, 500) end)
-    spawn_link(fn -> sleepy(name, 500) end)
-    spawn_link(fn -> sleepy(name, 500) end)
-    spawn_link(fn -> sleepy(name, 500) end)
-    spawn_link(fn -> sleepy(name, 500) end)
+    spawn_link(fn -> sleepy(self, name, 500) end)
+    spawn_link(fn -> sleepy(self, name, 500) end)
+    spawn_link(fn -> sleepy(self, name, 500) end)
+    spawn_link(fn -> sleepy(self, name, 500) end)
+    spawn_link(fn -> sleepy(self, name, 500) end)
     assert_receive :ok, 2000
     assert_receive :ok, 2000
     assert_receive {:error, :overload}, 2000
@@ -23,17 +23,17 @@ defmodule ConcurrentLimiterTest do
     assert_receive :ok, 2000
   end
 
-  defp sleepy(duration) do
+  defp sleepy(parent, name, duration) do
     result =
       ConcurrentLimiter.limit(name, fn ->
-        send(self, :ok)
-        Process.sleep(sleep)
+        send(parent, :ok)
+        Process.sleep(duration)
         :ok
       end)
 
     case result do
       :ok -> :ok
-      other -> send(self, other)
+      other -> send(parent, other)
     end
   end
 end