Disable failing OS X tests.

Apple patches OpenSSL to always fall back on the system CA store, so
the integration tests that expect SSL cert failures have never worked on
OS X. Disable them since I can't think of a workaround :-(.

TODO: add some integration tests on certificates that won't be in any
system CA store.

lib/restclient.rb

@@ -18,6 +18,7 @@ require File.dirname(__FILE__) + '/restclient/raw_response'
 require File.dirname(__FILE__) + '/restclient/resource'
 require File.dirname(__FILE__) + '/restclient/payload'
 require File.dirname(__FILE__) + '/restclient/windows'
+require File.dirname(__FILE__) + '/restclient/platform'
 
 # This module's static methods are the entry point for using the REST client.
 #

lib/restclient/platform.rb

@@ -0,0 +1,7 @@
+module RestClient
+  module Platform
+    def self.mac?
+      RUBY_PLATFORM.include?('darwin')
+    end
+  end
+end

spec/integration/request_spec.rb

@@ -31,7 +31,10 @@ describe RestClient::Request do
     # TODO: deprecate and remove RestClient::SSLCertificateNotVerified and just
     # pass through OpenSSL::SSL::SSLError directly. See note in
     # lib/restclient/request.rb.
-    it "is unsuccessful with an incorrect ca_file" do
+    #
+    # On OS X, this test fails since Apple has patched OpenSSL to always fall
+    # back on the system CA store.
+    it "is unsuccessful with an incorrect ca_file", :unless => RestClient::Platform.mac? do
       request = RestClient::Request.new(
         :method => :get,
         :url => 'https://www.mozilla.com',
@@ -40,7 +43,9 @@ describe RestClient::Request do
       expect { request.execute }.to raise_error(RestClient::SSLCertificateNotVerified)
     end
 
-    it "is unsuccessful with an incorrect ca_path" do
+    # On OS X, this test fails since Apple has patched OpenSSL to always fall
+    # back on the system CA store.
+    it "is unsuccessful with an incorrect ca_path", :unless => RestClient::Platform.mac? do
       request = RestClient::Request.new(
         :method => :get,
         :url => 'https://www.mozilla.com',