Avoid confusing Excon.stub with RSpec's #stub

Related to #4.

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Master
 
+* Avoid confusing `Excon.stub` with RSpec's `stub` ([#4](https://github.com/yujinakayama/transpec/issues/4))
+
 ## v0.1.2
 
 * Continue processing files even if a file has invalid syntax

lib/transpec/syntax/method_stub.rb

@@ -11,7 +11,10 @@ class Syntax
     class MethodStub < Syntax
       include AbleToAllowNoMessage, AbleToTargetAnyInstance, Util
 
-      RECEIVER_CLASS_WHITELIST = ['Typhoeus']
+      CLASSES_DEFINING_OWN_STUB_METHOD = [
+        'Typhoeus', # https://github.com/typhoeus/typhoeus/blob/6a59c62/lib/typhoeus.rb#L66-L85
+        'Excon'     # https://github.com/geemus/excon/blob/6af4f9c/lib/excon.rb#L143-L178
+      ]
 
       def allowize!
         # There's no way of unstubbing in #allow syntax.
@@ -54,7 +57,7 @@ def replace_deprecated_method!
       def self.target_receiver_node?(node)
         return false if node.nil?
         const_name = Util.const_name(node)
-        !RECEIVER_CLASS_WHITELIST.include?(const_name)
+        !CLASSES_DEFINING_OWN_STUB_METHOD.include?(const_name)
       end
 
       def self.target_method_names

spec/transpec/syntax/method_stub_spec.rb

@@ -58,6 +58,20 @@ class Syntax
             MethodStub.target_node?(send_node).should be_false
           end
         end
+
+        context 'when #stub node with Excon receiver is passed' do
+          let(:source) do
+            <<-END
+              it "is not RSpec's #stub" do
+                ::Excon.stub({}, {:body => 'body', :status => 200})
+              end
+            END
+          end
+
+          it 'returns false' do
+            MethodStub.target_node?(send_node).should be_false
+          end
+        end
       end
 
       describe '#method_name' do