From f2ff7372157a5c3c904ec13d7eaef834cdd8c0e1 Mon Sep 17 00:00:00 2001
From: Dmitriy Nesteryuk <dmitriy.nesteryuk@gmail.com>
Date: Wed, 15 Jan 2020 09:30:39 +0200
Subject: [PATCH] Be sure classes/modules listed for autoload really exist

---
 CHANGELOG.md        |  1 +
 lib/grape.rb        |  1 -
 spec/spec_helper.rb | 20 ++++++++++++++++++++
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13188bb37..045cd2c7b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 
 #### Fixes
 
+* [#](https://github.com/ruby-grape/grape/pull/): Be sure classes/modules listed for autoload really exist - [@dnesteryuk](https://github.com/dnesteryuk).
 * [#1971](https://github.com/ruby-grape/grape/pull/1971): Fix BigDecimal coercion - [@FlickStuart](https://github.com/FlickStuart).
 * [#1968](https://github.com/ruby-grape/grape/pull/1968): Fix args forwarding in Grape::Middleware::Stack#merge_with for ruby 2.7.0 - [@dm1try](https://github.com/dm1try).
 
diff --git a/lib/grape.rb b/lib/grape.rb
index 388fb54bd..e5fcc9802 100644
--- a/lib/grape.rb
+++ b/lib/grape.rb
@@ -84,7 +84,6 @@ module Extensions
     eager_autoload do
       autoload :DeepMergeableHash
       autoload :DeepSymbolizeHash
-      autoload :DeepHashWithIndifferentAccess
       autoload :Hash
     end
     module ActiveSupport
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index fa4f8bf00..e606972cb 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -10,6 +10,26 @@
 require 'bundler'
 Bundler.require :default, :test
 
+# Grape uses autoload https://api.rubyonrails.org/classes/ActiveSupport/Autoload.html.
+# When a class/module get added to the list, ActiveSupport doesn't check whether it really exists.
+# This method loads all classes/modules defined via autoload to be sure only existing
+# classes/modules were listed.
+def force_autoload(scope)
+  # get modules
+  scope.constants.each do |const_name|
+    const = scope.const_get(const_name)
+
+    next unless const.respond_to?(:eager_load!)
+
+    const.eager_load!
+
+    # check its modules, they might need to be loaded as well.
+    force_autoload(const)
+  end
+end
+
+force_autoload Grape
+
 Dir["#{File.dirname(__FILE__)}/support/*.rb"].each do |file|
   require file
 end