Support standalone adapters (#941)

* Expose relevant specs to external adapters

faraday.gemspec

@@ -20,5 +20,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency 'multipart-post', '>= 1.2', '< 3'
 
-  spec.files = `git ls-files -z lib LICENSE.md README.md`.split("\0")
+  spec.require_paths = %w[lib spec/external_adapters]
+  spec.files = `git ls-files -z lib spec/external_adapters`.split("\0")
+  spec.files += %w[LICENSE.md README.md]
 end

spec/external_adapters/faraday_specs_setup.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'webmock/rspec'
+WebMock.disable_net_connect!(allow_localhost: true)
+
+require_relative '../support/helper_methods'
+require_relative '../support/disabling_stub'
+require_relative '../support/streaming_response_checker'
+require_relative '../support/shared_examples/adapter'
+require_relative '../support/shared_examples/request_method'
+
+RSpec.configure do |config|
+  config.include Faraday::HelperMethods
+end

spec/spec_helper.rb

@@ -130,16 +130,3 @@ def dump_pending(_arg); end
 
   RSpec::Core::Formatters::DocumentationFormatter.prepend self
 end
-
-# Allows to disable WebMock stubs
-module DisablingStub
-  def disable
-    @disabled = true
-  end
-
-  def disabled?
-    @disabled
-  end
-
-  WebMock::RequestStub.prepend self
-end

spec/support/disabling_stub.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+# Allows to disable WebMock stubs
+module DisablingStub
+  def disable
+    @disabled = true
+  end
+
+  def disabled?
+    @disabled
+  end
+
+  WebMock::RequestStub.prepend self
+end