Add tests for WikiPages services

* Alter wiki_pages factory with custom creation operation

spec/factories/wiki_pages.rb

@@ -2,8 +2,26 @@ require 'ostruct'
 
 FactoryGirl.define do
   factory :wiki_page do
+    transient do
+      attrs do
+        {
+          title: 'Title',
+          content: 'Content for wiki page',
+          format: 'markdown'
+        }
+      end
+    end
+
     page { OpenStruct.new(url_path: 'some-name') }
     association :wiki, factory: :project_wiki, strategy: :build
     initialize_with { new(wiki, page, true) }
+
+    before(:create) do |page, evaluator|
+      page.attributes = evaluator.attrs
+    end
+
+    to_create do |page|
+      page.create
+    end
   end
 end

spec/services/wiki_pages/create_service_spec.rb

+require 'spec_helper'
+
+describe WikiPages::CreateService, services: true do
+  let(:project) { create(:empty_project) }
+  let(:user) { create(:user) }
+  let(:opts) do
+    {
+      title: 'Title',
+      content: 'Content for wiki page',
+      format: 'markdown'
+    }
+  end
+  let(:service) { described_class.new(project, user, opts) }
+
+  describe '#execute' do
+    context "valid params" do
+      before do
+        allow(service).to receive(:execute_hooks)
+        project.add_master(user)
+      end
+
+      subject { service.execute }
+
+      it 'creates a valid wiki page' do
+        is_expected.to be_valid
+        expect(subject.title).to eq(opts[:title])
+        expect(subject.content).to eq(opts[:content])
+        expect(subject.format).to eq(opts[:format].to_sym)
+      end
+
+      it 'executes webhooks' do
+        expect(service).to have_received(:execute_hooks).once.with(subject, 'create')
+      end
+    end
+  end
+end

spec/services/wiki_pages/update_service_spec.rb

+require 'spec_helper'
+
+describe WikiPages::UpdateService, services: true do
+  let(:project) { create(:empty_project) }
+  let(:user) { create(:user) }
+  let(:wiki_page) { create(:wiki_page) }
+  let(:opts) do
+    {
+      content: 'New content for wiki page',
+      format: 'markdown',
+      message: 'New wiki message'
+    }
+  end
+  let(:service) { described_class.new(project, user, opts) }
+
+  describe '#execute' do
+    context "valid params" do
+      before do
+        allow(service).to receive(:execute_hooks)
+        project.add_master(user)
+      end
+
+      subject { service.execute(wiki_page) }
+
+      it 'updates the wiki page' do
+        is_expected.to be_valid
+        expect(subject.content).to eq(opts[:content])
+        expect(subject.format).to eq(opts[:format].to_sym)
+        expect(subject.message).to eq(opts[:message])
+      end
+
+      it 'executes webhooks' do
+        expect(service).to have_received(:execute_hooks).once.with(subject, 'update')
+      end
+    end
+  end
+end