change retries_remaining retry_block arg to retry_count (O-based, inc…

…rementing)

lib/faraday/retry/middleware.rb

@@ -108,8 +108,7 @@ def retry_statuses
       #   every retry. The block will be yielded keyword arguments:
       #     * env [Faraday::Env]: Request environment
       #     * options [Faraday::Options]: middleware options
-      #     * retries_remaining [Integer]: how many more possible retries are
-      #       remaining
+      #     * retry_count [Integer]: how many retries have already occured (starts at 0)
       #     * exception [Exception]: exception that triggered the retry,
       #       will be the synthetic `Faraday::RetriableResponse` if the
       #       retry was triggered by something other than an exception.
@@ -157,7 +156,7 @@ def call(env)
               @options.retry_block.call(
                 env: env,
                 options: @options,
-                retries_remaining: retries,
+                retry_count: @options.max - (retries + 1),
                 exception: e,
                 will_retry_in: sleep_amount
               )

spec/faraday/retry/middleware_spec.rb

@@ -99,8 +99,12 @@
         expect(retry_block_calls.first[:exception]).to be_kind_of(Errno::ETIMEDOUT)
         expect(retry_block_calls.first[:options]).to be_kind_of(Faraday::Options)
         expect(retry_block_calls.first[:env]).to be_kind_of(Faraday::Env)
-        expect(retry_block_calls.first[:will_retry_in]).to be_kind_of(Float)
-        expect(retry_block_calls.first[:retries_remaining]).to eq 1
+        expect(retry_block_calls.first[:retry_count]).to be_kind_of(Integer)
+        expect(retry_block_calls.first[:retry_count]).to eq 0
+      end
+
+      it "increments retry_count" do
+        expect(retry_block_calls[1][:retry_count]).to eq 1
       end
     end
   end