Ensure v3 environments endpoints remain unchanged

Because environments also expose the project, ensure the projects are
exposed as they were before in API v3.

lib/api/v3/entities.rb

@@ -188,6 +188,10 @@ module API
         expose :projects, using: Entities::Project
         expose :shared_projects, using: Entities::Project
       end
+
+      class Environment < ::API::Entities::EnvironmentBasic
+        expose :project, using: Entities::Project
+      end
     end
   end
 end

lib/api/v3/environments.rb

 module API
   module V3
     class Environments < Grape::API
+      include ::API::Helpers::CustomValidators
       include PaginationParams
 
       before { authenticate! }
@@ -9,9 +10,66 @@ module API
         requires :id, type: String, desc: 'The project ID'
       end
       resource :projects do
+        desc 'Get all environments of the project' do
+          detail 'This feature was introduced in GitLab 8.11.'
+          success Entities::Environment
+        end
+        params do
+          use :pagination
+        end
+        get ':id/environments' do
+          authorize! :read_environment, user_project
+
+          present paginate(user_project.environments), with: Entities::Environment
+        end
+
+        desc 'Creates a new environment' do
+          detail 'This feature was introduced in GitLab 8.11.'
+          success Entities::Environment
+        end
+        params do
+          requires :name,           type: String,   desc: 'The name of the environment to be created'
+          optional :external_url,   type: String,   desc: 'URL on which this deployment is viewable'
+          optional :slug, absence: { message: "is automatically generated and cannot be changed" }
+        end
+        post ':id/environments' do
+          authorize! :create_environment, user_project
+
+          environment = user_project.environments.create(declared_params)
+
+          if environment.persisted?
+            present environment, with: Entities::Environment
+          else
+            render_validation_error!(environment)
+          end
+        end
+
+        desc 'Updates an existing environment' do
+          detail 'This feature was introduced in GitLab 8.11.'
+          success Entities::Environment
+        end
+        params do
+          requires :environment_id, type: Integer,  desc: 'The environment ID'
+          optional :name,           type: String,   desc: 'The new environment name'
+          optional :external_url,   type: String,   desc: 'The new URL on which this deployment is viewable'
+          optional :slug, absence: { message: "is automatically generated and cannot be changed" }
+        end
+        put ':id/environments/:environment_id' do
+          authorize! :update_environment, user_project
+
+          environment = user_project.environments.find(params[:environment_id])
+
+          update_params = declared_params(include_missing: false).extract!(:name, :external_url)
+          if environment.update(update_params)
+            present environment, with: Entities::Environment
+          else
+            render_validation_error!(environment)
+          end
+        end
+
         desc 'Deletes an existing environment' do
           detail 'This feature was introduced in GitLab 8.11.'
-          success ::API::Entities::Environment
+          success Entities::Environment
         end
         params do
           requires :environment_id, type: Integer,  desc: 'The environment ID'
@@ -21,7 +79,7 @@ module API
 
           environment = user_project.environments.find(params[:environment_id])
 
-          present environment.destroy, with: ::API::Entities::Environment
+          present environment.destroy, with: Entities::Environment
         end
       end
     end

spec/requests/api/environments_spec.rb

@@ -24,6 +24,7 @@ describe API::Environments, api: true  do
         expect(json_response.first['name']).to eq(environment.name)
         expect(json_response.first['external_url']).to eq(environment.external_url)
         expect(json_response.first['project']['id']).to eq(project.id)
+        expect(json_response.first['project']['visibility']).to be_present
       end
     end
 

spec/requests/api/v3/environments_spec.rb

@@ -12,6 +12,132 @@ describe API::V3::Environments, api: true  do
     project.team << [user, :master]
   end
 
+  shared_examples 'a paginated resources' do
+    before do
+      # Fires the request
+      request
+    end
+
+    it 'has pagination headers' do
+      expect(response.headers).to include('X-Total')
+      expect(response.headers).to include('X-Total-Pages')
+      expect(response.headers).to include('X-Per-Page')
+      expect(response.headers).to include('X-Page')
+      expect(response.headers).to include('X-Next-Page')
+      expect(response.headers).to include('X-Prev-Page')
+      expect(response.headers).to include('Link')
+    end
+  end
+
+  describe 'GET /projects/:id/environments' do
+    context 'as member of the project' do
+      it_behaves_like 'a paginated resources' do
+        let(:request) { get v3_api("/projects/#{project.id}/environments", user) }
+      end
+
+      it 'returns project environments' do
+        get v3_api("/projects/#{project.id}/environments", user)
+
+        expect(response).to have_http_status(200)
+        expect(json_response).to be_an Array
+        expect(json_response.size).to eq(1)
+        expect(json_response.first['name']).to eq(environment.name)
+        expect(json_response.first['external_url']).to eq(environment.external_url)
+        expect(json_response.first['project']['id']).to eq(project.id)
+        expect(json_response.first['project']['visibility_level']).to be_present
+      end
+    end
+
+    context 'as non member' do
+      it 'returns a 404 status code' do
+        get v3_api("/projects/#{project.id}/environments", non_member)
+
+        expect(response).to have_http_status(404)
+      end
+    end
+  end
+
+  describe 'POST /projects/:id/environments' do
+    context 'as a member' do
+      it 'creates a environment with valid params' do
+        post v3_api("/projects/#{project.id}/environments", user), name: "mepmep"
+
+        expect(response).to have_http_status(201)
+        expect(json_response['name']).to eq('mepmep')
+        expect(json_response['slug']).to eq('mepmep')
+        expect(json_response['external']).to be nil
+      end
+
+      it 'requires name to be passed' do
+        post v3_api("/projects/#{project.id}/environments", user), external_url: 'test.gitlab.com'
+
+        expect(response).to have_http_status(400)
+      end
+
+      it 'returns a 400 if environment already exists' do
+        post v3_api("/projects/#{project.id}/environments", user), name: environment.name
+
+        expect(response).to have_http_status(400)
+      end
+
+      it 'returns a 400 if slug is specified' do
+        post v3_api("/projects/#{project.id}/environments", user), name: "foo", slug: "foo"
+
+        expect(response).to have_http_status(400)
+        expect(json_response["error"]).to eq("slug is automatically generated and cannot be changed")
+      end
+    end
+
+    context 'a non member' do
+      it 'rejects the request' do
+        post v3_api("/projects/#{project.id}/environments", non_member), name: 'gitlab.com'
+
+        expect(response).to have_http_status(404)
+      end
+
+      it 'returns a 400 when the required params are missing' do
+        post v3_api("/projects/12345/environments", non_member), external_url: 'http://env.git.com'
+      end
+    end
+  end
+
+  describe 'PUT /projects/:id/environments/:environment_id' do
+    it 'returns a 200 if name and external_url are changed' do
+      url = 'https://mepmep.whatever.ninja'
+      put v3_api("/projects/#{project.id}/environments/#{environment.id}", user),
+          name: 'Mepmep', external_url: url
+
+      expect(response).to have_http_status(200)
+      expect(json_response['name']).to eq('Mepmep')
+      expect(json_response['external_url']).to eq(url)
+    end
+
+    it "won't allow slug to be changed" do
+      slug = environment.slug
+      api_url = v3_api("/projects/#{project.id}/environments/#{environment.id}", user)
+      put api_url, slug: slug + "-foo"
+
+      expect(response).to have_http_status(400)
+      expect(json_response["error"]).to eq("slug is automatically generated and cannot be changed")
+    end
+
+    it "won't update the external_url if only the name is passed" do
+      url = environment.external_url
+      put v3_api("/projects/#{project.id}/environments/#{environment.id}", user),
+          name: 'Mepmep'
+
+      expect(response).to have_http_status(200)
+      expect(json_response['name']).to eq('Mepmep')
+      expect(json_response['external_url']).to eq(url)
+    end
+
+    it 'returns a 404 if the environment does not exist' do
+      put v3_api("/projects/#{project.id}/environments/12345", user)
+
+      expect(response).to have_http_status(404)
+    end
+  end
+
   describe 'DELETE /projects/:id/environments/:environment_id' do
     context 'as a master' do
       it 'returns a 200 for an existing environment' do