Add elapsed_seconds to request object (#15)

README.md

@@ -119,6 +119,7 @@ request.verb # => "POST"
 request.url # => "http://example.com"
 request.body # => '{"a": 1}'
 request.headers # => { "Content-Type" => "application/json; charset=UTF-8", ... }
+request.elapsed_seconds # => 0.08117745001072763
 ```
 
 ## Response object

lib/ezclient/request.rb

@@ -10,7 +10,7 @@ class EzClient::Request
     query
   ].freeze
 
-  attr_accessor :verb, :url, :options
+  attr_accessor :verb, :url, :options, :elapsed_seconds
 
   def initialize(verb, url, options)
     self.verb = verb.to_s.upcase
@@ -101,6 +101,7 @@ def http_client
   end
 
   def perform_request
+    perform_started_at = EzClient.get_time
     with_retry do
       # Use original client so that connection can be reused
       res = client.perform(http_request, http_options)
@@ -110,6 +111,8 @@ def perform_request
         client.perform(request, http_options)
       end
     end
+  ensure
+    self.elapsed_seconds = EzClient.get_time - perform_started_at
   end
 
   def with_retry(&block)

spec/ezclient_spec.rb

@@ -34,6 +34,7 @@ def self.sign!(*); end
       expect(request.verb).to eq("POST")
       expect(request.url).to eq("http://example.com")
       expect(request.body).to eq("a=1")
+      expect(request.elapsed_seconds).to be_a(Float)
 
       expect(request.headers).to eq(
         "Connection" => "close",
@@ -258,6 +259,7 @@ def self.sign!(*); end
       let(:on_error) do
         proc do |request, error, metadata|
           expect(request.url).to eq("http://example.com")
+          expect(request.elapsed_seconds).to be_a(Float)
           expect(error).to be_a(StandardError)
           expect(metadata).to eq(:smth)
           calls << nil