Make Test adapter constructor able to receive stubs as a keyword argument

lib/faraday/adapter/test.rb

@@ -255,8 +255,9 @@ def to_s
         end
       end
 
-      def initialize(app, stubs = nil, &block)
+      def initialize(app, stubs_or_options = nil, &block)
         super(app)
+        stubs = stubs_or_options.is_a?(Hash) ? stubs_or_options[:stubs] : stubs_or_options
         @stubs = stubs || Stubs.new
         configure(&block) if block
       end

spec/faraday/adapter/test_spec.rb

@@ -41,6 +41,14 @@
 
   let(:response) { connection.get('/hello') }
 
+  it 'can receive stubs as a positional argument' do
+    expect(described_class.new(dummy_rack_app, stubs).stubs).to be stubs
+  end
+
+  it 'can receive stubs as a keyword argument' do
+    expect(described_class.new(dummy_rack_app, stubs: stubs).stubs).to be stubs
+  end
+
   context 'with simple path sets status' do
     subject { response.status }
 

spec/support/helper_methods.rb

@@ -92,5 +92,9 @@ def big_string
       kb = 1024
       (32..126).map(&:chr).cycle.take(50 * kb).join
     end
+
+    def dummy_rack_app
+      ->(_env) { [200, { 'content-type' => 'text/plain' }, ['Hello World']] }
+    end
   end
 end