Implement Inspect protocol

Author: keathley

lib/circular_buffer.ex

@@ -102,4 +102,12 @@ defmodule CircularBuffer do
       {original, collector_fn}
     end
   end
+
+  defimpl Inspect do
+    import Inspect.Algebra
+
+    def inspect(cb, opts) do
+      concat(["#CircularBuffer<", to_doc(CB.to_list(cb), opts), ">"])
+    end
+  end
 end

test/circular_buffer_test.exs

@@ -107,6 +107,11 @@ defmodule CircularBufferTest do
     end
   end
 
+  test "can be inspected" do
+    str = inspect(Enum.into([1,2,3,4], CB.new(4)))
+    assert str == "#CircularBuffer<[1, 2, 3, 4]>"
+  end
+
   def size_and_list do
     let size <- pos_integer() do
       let is <- ints(size*2, []) do