Refactor CI API specs for creating runner

spec/requests/ci/api/runners_spec.rb

@@ -12,45 +12,57 @@ describe Ci::API::API do
   end
 
   describe "POST /runners/register" do
-    describe "should create a runner if token provided" do
+    context 'when runner token is provided' do
       before { post ci_api("/runners/register"), token: registration_token }
 
-      it { expect(response.status).to eq(201) }
+      it 'creates runner' do
+        expect(response.status).to eq(201)
+      end
     end
 
-    describe "should create a runner with description" do
+    context 'when runner description is provided' do
       before { post ci_api("/runners/register"), token: registration_token, description: "server.hostname" }
 
-      it { expect(response.status).to eq(201) }
-      it { expect(Ci::Runner.first.description).to eq("server.hostname") }
+      it 'creates runner' do
+        expect(response.status).to eq(201)
+        expect(Ci::Runner.first.description).to eq("server.hostname")
+      end
     end
 
-    describe "should create a runner with tags" do
+    context 'when runner tags are provided' do
       before { post ci_api("/runners/register"), token: registration_token, tag_list: "tag1, tag2" }
 
-      it { expect(response.status).to eq(201) }
-      it { expect(Ci::Runner.first.tag_list.sort).to eq(["tag1", "tag2"]) }
+      it 'creates runner' do
+        expect(response.status).to eq(201)
+        expect(Ci::Runner.first.tag_list.sort).to eq(["tag1", "tag2"])
+      end
     end
 
-    describe "should create a runner if project token provided" do
+    context 'when project token is provided' do
       let(:project) { FactoryGirl.create(:empty_project) }
       before { post ci_api("/runners/register"), token: project.runners_token }
 
-      it { expect(response.status).to eq(201) }
-      it { expect(project.runners.size).to eq(1) }
+      it 'creates runner' do
+        expect(response.status).to eq(201)
+        expect(project.runners.size).to eq(1)
+      end
     end
 
-    it "should return 403 error if token is invalid" do
+    context 'when token is invalid' do
+      it 'returns 403 error' do
         post ci_api("/runners/register"), token: 'invalid'
 
         expect(response.status).to eq(403)
       end
+    end
 
-    it "should return 400 error if no token" do
+    context 'when no token provided' do
+      it 'returns 400 error' do
         post ci_api("/runners/register")
 
         expect(response.status).to eq(400)
       end
+    end
 
     %w(name version revision platform architecture).each do |param|
       context "creates runner with #{param} saved" do