fix #100 bug when response is a string

We should rescue the JSON parsing

fix rubocop

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## Next Release
 
 * Your contribution here.
+* [#101](https://github.com/bigcommerce/bigcommerce-api-ruby/pull/101): Fix #100 when exception and env.body is a string. - [@gregory](https://github.com/gregory).
 
 ## 1.0.0
 Please note that this is the start of a new major release which breaks all backward compatibility.

Guardfile

@@ -1,9 +1,9 @@
 guard 'rspec', all_on_start: false, cmd: 'bundle exec rspec' do
   # Watch spec directory
-  watch(/^spec\/.+_spec\.rb/)
+  watch(%r{^spec\/.+_spec\.rb})
 
   # Watch lib/*.rb
-  watch(/^lib\/(.+)\.rb/) do |m|
+  watch(%r{^lib\/(.+)\.rb}) do |m|
     "spec/bigcommerce/#{m[1]}_spec.rb"
   end
 

lib/bigcommerce/exception.rb

@@ -6,19 +6,19 @@ def initialize(headers)
     end
   end
 
-  class BadRequest             < HttpError; end
-  class Unauthorized           < HttpError; end
-  class Forbidden              < HttpError; end
-  class NotFound               < HttpError; end
-  class MethodNotAllowed       < HttpError; end
-  class NotAccepted            < HttpError; end
-  class TimeOut                < HttpError; end
-  class ResourceConflict       < HttpError; end
-  class TooManyRequests        < HttpError; end
-  class InternalServerError    < HttpError; end
-  class BadGateway             < HttpError; end
-  class ServiceUnavailable     < HttpError; end
-  class GatewayTimeout         < HttpError; end
+  class BadRequest < HttpError; end
+  class Unauthorized < HttpError; end
+  class Forbidden < HttpError; end
+  class NotFound < HttpError; end
+  class MethodNotAllowed < HttpError; end
+  class NotAccepted < HttpError; end
+  class TimeOut < HttpError; end
+  class ResourceConflict < HttpError; end
+  class TooManyRequests < HttpError; end
+  class InternalServerError < HttpError; end
+  class BadGateway < HttpError; end
+  class ServiceUnavailable < HttpError; end
+  class GatewayTimeout < HttpError; end
   class BandwidthLimitExceeded < HttpError; end
 
   module HttpErrors
@@ -41,11 +41,18 @@ module HttpErrors
 
     def throw_http_exception!(code, env)
       return unless ERRORS.keys.include? code
-      error_hash = env.body.empty? ? {} : JSON.parse(env.body, symbolize_names: true)
+      response_headers = {}
+      unless env.body.empty?
+        begin
+          response_headers = JSON.parse(env.body, symbolize_names: true)
+        rescue
+          {}
+        end
+      end
       unless env[:response_headers]['X-Retry-After'].nil?
-        error_hash[:retry_after] = env[:response_headers]['X-Retry-After'].to_i
+        response_headers[:retry_after] = env[:response_headers]['X-Retry-After'].to_i
       end
-      fail ERRORS[code].new(error_hash), env.body
+      fail ERRORS[code].new(response_headers), env.body
     end
   end
 end

spec/bigcommerce/unit/exception_spec.rb

@@ -41,6 +41,19 @@
         expect(e.response_headers[:retry_after]).to eq 1
       end
     end
+
+    it 'handle string in body' do
+      message = 'Unauthorized'
+      code = 401
+      env = double(:env)
+      allow(env).to receive(:body) { message }
+      allow(env).to receive(:[]) { {} }
+      begin
+        dummy_class.throw_http_exception!(code, env)
+      rescue Bigcommerce::Unauthorized => e
+        expect(e.message).to eq message
+      end
+    end
   end
 
   context 'valid response status' do