Add tests for finding an oauth authenticated user

lib/gitlab/oauth/user.rb

@@ -67,7 +67,7 @@ module Gitlab
         end
 
         def uid
-          uid = auth.info.uid || auth.uid
+          uid = auth.info.try(:uid) || auth.uid
           uid = uid.to_s unless uid.nil?
           uid
         end

spec/lib/gitlab/oauth/user_spec.rb

@@ -2,39 +2,54 @@ require 'spec_helper'
 
 describe Gitlab::OAuth::User do
   let(:gl_auth) { Gitlab::OAuth::User }
-
-  before do
-    Gitlab.config.stub(omniauth: {})
-
-    @info = double(
-      uid: '12djsak321',
+  let(:info) do
+    double(
+      uid: 'my-uid',
       nickname: 'john',
       name: 'John',
       email: 'john@mail.com'
     )
   end
 
+  before do
+    Gitlab.config.stub(omniauth: {})
+  end
+
+  describe :find do
+    let!(:existing_user) { create(:user, extern_uid: 'my-uid', provider: 'my-provider') }
+
+    it "finds an existing user based on uid and provider (facebook)" do
+      auth = double(info: double(name: 'John'), uid: 'my-uid', provider: 'my-provider')
+      assert gl_auth.find(auth)
+    end
+
+    it "finds an existing user based on nested uid and provider" do
+      auth = double(info: info, provider: 'my-provider')
+      assert gl_auth.find(auth)
+    end
+  end
+
   describe :create do
     it "should create user from LDAP" do
-      @auth = double(info: @info, provider: 'ldap')
+      @auth = double(info: info, provider: 'ldap')
       user = gl_auth.create(@auth)
 
       user.should be_valid
-      user.extern_uid.should == @info.uid
+      user.extern_uid.should == info.uid
       user.provider.should == 'ldap'
     end
 
     it "should create user from Omniauth" do
-      @auth = double(info: @info, provider: 'twitter')
+      @auth = double(info: info, provider: 'twitter')
       user = gl_auth.create(@auth)
 
       user.should be_valid
-      user.extern_uid.should == @info.uid
+      user.extern_uid.should == info.uid
       user.provider.should == 'twitter'
     end
 
     it "should apply defaults to user" do
-      @auth = double(info: @info, provider: 'ldap')
+      @auth = double(info: info, provider: 'ldap')
       user = gl_auth.create(@auth)
 
       user.should be_valid