Update specs to use expect

http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/

[fixes doorkeeper-gem#731]

spec/lib/oauth/error_response_spec.rb

@@ -37,25 +37,25 @@ module Doorkeeper::OAuth
       subject { ErrorResponse.new(name: :some_error, state: :some_state).body }
 
       describe '#body' do
-        it { should have_key(:error) }
-        it { should have_key(:error_description) }
-        it { should have_key(:state) }
+        it { expect(subject).to have_key(:error) }
+        it { expect(subject).to have_key(:error_description) }
+        it { expect(subject).to have_key(:state) }
       end
     end
 
     describe '.authenticate_info' do
       let(:error_response) { ErrorResponse.new(name: :some_error, state: :some_state) }
       subject { error_response.authenticate_info }
 
-      it { should include("realm=\"#{error_response.realm}\"") }
-      it { should include("error=\"#{error_response.name}\"") }
-      it { should include("error_description=\"#{error_response.description}\"") }
+      it { expect(subject).to include("realm=\"#{error_response.realm}\"") }
+      it { expect(subject).to include("error=\"#{error_response.name}\"") }
+      it { expect(subject).to include("error_description=\"#{error_response.description}\"") }
     end
 
     describe '.headers' do
       subject { ErrorResponse.new(name: :some_error, state: :some_state).headers }
 
-      it { should include 'WWW-Authenticate' }
+      it { expect(subject).to include 'WWW-Authenticate' }
     end
   end
 end

spec/lib/oauth/error_spec.rb

@@ -6,8 +6,8 @@ module Doorkeeper::OAuth
   describe Error do
     subject { Error.new(:some_error, :some_state) }
 
-    it { should respond_to(:name) }
-    it { should respond_to(:state) }
+    it { expect(subject).to respond_to(:name) }
+    it { expect(subject).to respond_to(:state) }
 
     describe :description do
       it 'is translated from translation messages' do

spec/lib/oauth/scopes_spec.rb

@@ -47,7 +47,7 @@ module Doorkeeper::OAuth
 
       subject { Scopes.from_string(string) }
 
-      it { should be_a(Scopes) }
+      it { expect(subject).to be_a(Scopes) }
 
       describe '#all' do
         it 'should be an array of the expected scopes' do

spec/models/doorkeeper/access_grant_spec.rb

@@ -3,7 +3,7 @@
 describe Doorkeeper::AccessGrant do
   subject { FactoryGirl.build(:access_grant) }
 
-  it { should be_valid }
+  it { expect(subject).to be_valid }
 
   it_behaves_like 'an accessible token'
   it_behaves_like 'a revocable token'
@@ -14,23 +14,23 @@
   describe 'validations' do
     it 'is invalid without resource_owner_id' do
       subject.resource_owner_id = nil
-      should_not be_valid
+      expect(subject).not_to be_valid
     end
 
     it 'is invalid without application_id' do
       subject.application_id = nil
-      should_not be_valid
+      expect(subject).not_to be_valid
     end
 
     it 'is invalid without token' do
       subject.save
       subject.token = nil
-      should_not be_valid
+      expect(subject).not_to be_valid
     end
 
     it 'is invalid without expires_in' do
       subject.expires_in = nil
-      should_not be_valid
+      expect(subject).not_to be_valid
     end
   end
 end

spec/models/doorkeeper/access_token_spec.rb

@@ -4,7 +4,7 @@ module Doorkeeper
   describe AccessToken do
     subject { FactoryGirl.build(:access_token) }
 
-    it { should be_valid }
+    it { expect(subject).to be_valid }
 
     it_behaves_like 'an accessible token'
     it_behaves_like 'a revocable token'
@@ -141,7 +141,7 @@ module NoGenerate
       it 'is valid without resource_owner_id' do
         # For client credentials flow
         subject.resource_owner_id = nil
-        should be_valid
+        expect(subject).to be_valid
       end
     end