Adds specific errors for connection timeout and failure

This should be backwards compatible with the existing code as
the new errors inherit from ApiError and maintain the same
string signature of the previous errors

lib/plaid/api_client.rb

@@ -23,6 +23,9 @@
 
 module Plaid
   class ApiClient
+    class ApiTimeoutError < ApiError; end
+    class ApiConnectionFailedError < ApiError; end
+
     # The Configuration object holding settings to be used in the API client.
     attr_accessor :config
 
@@ -99,9 +102,9 @@ def call_api(http_method, path, opts = {})
           end
         end
       rescue Faraday::TimeoutError
-        fail ApiError.new('Connection timed out')
+        fail ApiTimeoutError.new('Connection timed out')
       rescue Faraday::ConnectionFailed
-        fail ApiError.new('Connection failed')
+        fail ApiConnectionFailedError.new('Connection failed')
       end
 
       if opts[:return_type]

templates/ruby/api_client.mustache

@@ -20,6 +20,11 @@ require 'faraday/multipart'
 
 module {{moduleName}}
   class ApiClient
+{{#isFaraday}}
+    class ApiTimeoutError < ApiError; end
+    class ApiConnectionFailedError < ApiError; end
+
+{{/isFaraday}}
     # The Configuration object holding settings to be used in the API client.
     attr_accessor :config
 

templates/ruby/api_client_faraday_partial.mustache

@@ -41,9 +41,9 @@
           end
         end
       rescue Faraday::TimeoutError
-        fail ApiError.new('Connection timed out')
+        fail ApiTimeoutError.new('Connection timed out')
       rescue Faraday::ConnectionFailed
-        fail ApiError.new('Connection failed')
+        fail ApiConnectionFailedError.new('Connection failed')
       end
 
       if opts[:return_type]

test/test_api_client.rb

@@ -1,11 +1,10 @@
 require 'faraday'
 require 'faraday/multipart'
 
-
 require_relative "test_helper"
 
 # Internal: The test for API Client
-class APIClientTest < PlaidTest
+class ApiClientTest < PlaidTest
   def test_api_client_exposes_farday_connection
     configuration = Plaid::Configuration.new
     configuration.server_index = Plaid::Configuration::Environment["sandbox"]
@@ -20,4 +19,32 @@ def test_api_client_exposes_farday_connection
 
     assert_kind_of(Faraday::Connection, api_client.connection)
   end
+
+  def test_timeout_error
+    api_client = Plaid::ApiClient.new
+    exception = -> { raise Faraday::TimeoutError.new }
+    options = { header_params: {} }
+
+    error = assert_raises Plaid::ApiClient::ApiTimeoutError do
+      api_client.connection.stub :get, exception do
+        api_client.call_api(:get, 'dummy_path', options)
+      end
+    end
+
+    assert_equal 'Connection timed out', error.message
+  end
+
+  def test_connection_error
+    api_client = Plaid::ApiClient.new
+    exception = -> { raise Faraday::ConnectionFailed.new }
+    options = { header_params: {} }
+
+    error = assert_raises Plaid::ApiClient::ApiConnectionFailedError do
+      api_client.connection.stub :get, exception do
+        api_client.call_api(:get, 'dummy_path', options)
+      end
+    end
+
+    assert_equal 'Connection failed', error.message
+  end
 end