Freeze time to fix flakey specs

spec/rack_attack_throttle_spec.rb

@@ -3,8 +3,9 @@
 require_relative 'spec_helper'
 
 describe 'Rack::Attack.throttle' do
+  freeze_time!
   before do
-    @period = 60 # Use a long period; failures due to cache key rotation less likely
+    @period = 60
     Rack::Attack.cache.store = ActiveSupport::Cache::MemoryStore.new
     Rack::Attack.throttle('ip/sec', limit: 1, period: @period) { |req| req.ip }
   end
@@ -61,8 +62,9 @@
 end
 
 describe 'Rack::Attack.throttle with limit as proc' do
+  freeze_time!
   before do
-    @period = 60 # Use a long period; failures due to cache key rotation less likely
+    @period = 60
     Rack::Attack.cache.store = ActiveSupport::Cache::MemoryStore.new
     Rack::Attack.throttle('ip/sec', limit: lambda { |_req| 1 }, period: @period) { |req| req.ip }
   end
@@ -92,8 +94,9 @@
 end
 
 describe 'Rack::Attack.throttle with period as proc' do
+  freeze_time!
   before do
-    @period = 60 # Use a long period; failures due to cache key rotation less likely
+    @period = 60
     Rack::Attack.cache.store = ActiveSupport::Cache::MemoryStore.new
     Rack::Attack.throttle('ip/sec', limit: lambda { |_req| 1 }, period: lambda { |_req| @period }) { |req| req.ip }
   end
@@ -123,6 +126,7 @@
 end
 
 describe 'Rack::Attack.throttle with block retuning nil' do
+  freeze_time!
   before do
     @period = 60
     Rack::Attack.cache.store = ActiveSupport::Cache::MemoryStore.new
@@ -146,6 +150,7 @@
 end
 
 describe 'Rack::Attack.throttle with throttle_discriminator_normalizer' do
+  freeze_time!
   before do
     @period = 60
     @emails = [

spec/spec_helper.rb

@@ -7,6 +7,7 @@
 require "rack/test"
 require "active_support"
 require "rack/attack"
+require "timecop"
 
 if RUBY_ENGINE == "ruby"
   require "byebug"
@@ -58,6 +59,11 @@ def self.it_allows_ok_requests
       _(last_response.body).must_equal 'Hello World'
     end
   end
+
+  def self.freeze_time!
+    before { Timecop.freeze }
+    after { Timecop.return }
+  end
 end
 
 class Minitest::SharedExamples < Module