Add extra error classes to handle server errors.

In order to provide more granularity on the exceptions, we are adding some additional
error classes for the common Server errors.

Author: emancu

lib/json_api_client/errors.rb

@@ -44,6 +44,25 @@ class AccessDenied < ClientError
     class NotAuthorized < ClientError
     end
 
+    class NotFound < ClientError
+      attr_reader :uri
+      def initialize(uri)
+        @uri = uri
+
+        msg = "Couldn't find resource at: #{uri.to_s}"
+        super nil, msg
+      end
+    end
+
+    class Conflict < ClientError
+      def initialize(env, msg = 'Resource already exists')
+        super env, msg
+      end
+    end
+
+    class TooManyRequests < ClientError
+    end
+
     class ConnectionError < ApiError
     end
 
@@ -59,23 +78,16 @@ def initialize(env, msg = nil)
       end
     end
 
-    class Conflict < ServerError
-      def initialize(env, msg = 'Resource already exists')
-        super env, msg
-      end
+    class InternalServerError < ServerError
     end
 
-    class NotFound < ServerError
-      attr_reader :uri
-      def initialize(uri)
-        @uri = uri
+    class BadGateway < ServerError
+    end
 
-        msg = "Couldn't find resource at: #{uri.to_s}"
-        super nil, msg
-      end
+    class ServiceUnavailable < ServerError
     end
 
-    class InternalServerError < ServerError
+    class GatewayTimeout < ServerError
     end
 
     class UnexpectedStatus < ServerError

lib/json_api_client/middleware/status.rb

@@ -42,10 +42,18 @@ def handle_status(code, env)
           raise Errors::Conflict, env
         when 422
           # Allow to proceed as resource errors will be populated
+        when 429
+          raise Errors::TooManyRequests, env
         when 400..499
           raise Errors::ClientError, env
         when 500
           raise Errors::InternalServerError, env
+        when 502
+          raise Errors::BadGateway, env
+        when 503
+          raise Errors::ServiceUnavailable, env
+        when 504
+          raise Errors::GatewayTimeout, env
         when 501..599
           raise Errors::ServerError, env
         else

test/unit/errors_test.rb

@@ -96,6 +96,42 @@ def test_not_authorized
     end
   end
 
+  def test_too_many_requests
+    stub_request(:get, "http://example.com/users")
+      .to_return(headers: {content_type: "text/plain"}, status: 429, body: "too many requests")
+
+    assert_raises JsonApiClient::Errors::TooManyRequests do
+      User.all
+    end
+  end
+
+  def test_bad_gateway
+    stub_request(:get, "http://example.com/users")
+      .to_return(headers: {content_type: "text/plain"}, status: 502, body: "bad gateway")
+
+    assert_raises JsonApiClient::Errors::BadGateway do
+      User.all
+    end
+  end
+
+  def test_service_unavailable
+    stub_request(:get, "http://example.com/users")
+      .to_return(headers: {content_type: "text/plain"}, status: 503, body: "service unavailable")
+
+    assert_raises JsonApiClient::Errors::ServiceUnavailable do
+      User.all
+    end
+  end
+
+  def test_gateway_timeout
+    stub_request(:get, "http://example.com/users")
+      .to_return(headers: {content_type: "text/plain"}, status: 504, body: "gateway timeout")
+
+    assert_raises JsonApiClient::Errors::GatewayTimeout do
+      User.all
+    end
+  end
+
   def test_errors_are_rescuable_by_default_rescue
     begin
       raise JsonApiClient::Errors::ApiError, "Something bad happened"