Clear old instances out via `#reset`

dist/pigeon/key_pair.rb

@@ -11,6 +11,10 @@ module Pigeon
       [HEADER, urlsafe_b64_no_headers, FOOTER].join("")
     end
 
+    def self.reset
+      @current = nil
+    end
+
     def self.current
       if @current
         @current

dist/pigeon/storage.rb

@@ -2,6 +2,11 @@ require "pstore"
 
 module Pigeon
   class Storage
+    def self.reset
+      @current.implode if @current
+      @current = nil
+    end
+
     def self.current
       @current ||= self.new
     end
@@ -96,6 +101,14 @@ module Pigeon
       end
     end
 
+    def implode
+      @store.transaction do
+        @store.roots.map do |x|
+          store.delete(x)
+        end
+      end
+    end
+
     private
 
     def store

spec/pigeon/message_spec.rb

@@ -11,6 +11,8 @@ RSpec.describe Pigeon::Message do
   end
 
   it "signs a message" do
+    Pigeon::Storage.reset
+    Pigeon::KeyPair.reset
     m1 = message
     message2 = Pigeon::Message.create(kind: "unit_test")
     message2.append("expected_sequence", "1")
@@ -34,6 +36,8 @@ RSpec.describe Pigeon::Message do
   ].join("\n")
 
   it "renders a first message" do
+    Pigeon::Storage.reset
+    Pigeon::KeyPair.reset
     pk = Pigeon::KeyPair.current.public_key
     actual = message.render
     expected = MSG.gsub("___", pk)
@@ -41,6 +45,8 @@ RSpec.describe Pigeon::Message do
   end
 
   it "creates a new message" do
+    Pigeon::Storage.reset
+    Pigeon::KeyPair.reset
     message = Pigeon::Message.create(kind: "unit_test")
     hash = Pigeon::Storage.current.set_blob(File.read("./logo.png"))
     expectations = {