Use DELETE verb for erasing a build content

Also added API specs for that

app/views/projects/builds/show.html.haml

@@ -120,7 +120,7 @@
                 = link_to "Retry", @build.retry_url, class: 'btn btn-sm btn-primary', method: :post
 
               - if @build.eraseable?
-                = link_to @build.erase_url, class: 'btn btn-sm btn-warning', method: :put,
+                = link_to @build.erase_url, class: 'btn btn-sm btn-warning', method: :delete,
                                             data: { confirm: 'Are you sure you want to erase this build?' } do
                   = icon('eraser')
                   Erase

config/routes.rb

@@ -617,7 +617,7 @@ Rails.application.routes.draw do
             get :status
             post :cancel
             post :retry
-            put :erase
+            delete :erase
           end
 
           resource :artifacts, only: [] do

lib/ci/api/builds.rb

@@ -156,6 +156,7 @@ module Ci
           build = Ci::Build.find_by_id(params[:id])
           not_found! unless build
           authenticate_build_token!(build)
+
           build.remove_artifacts_file!
           build.remove_artifacts_metadata!
         end
@@ -168,11 +169,12 @@ module Ci
         # Headers:
         #   BUILD-TOKEN (required) - The build authorization token, the same as token
         # Example Request:
-        #   PUT /builds/:id/erase
-        put ':id/erase' do
+        #   DELETE /builds/:id/content
+        delete ':id/content' do
           build = Ci::Build.find_by_id(params[:id])
           not_found! unless build
           authenticate_build_token!(build)
+
           build.erase!
         end
       end

spec/factories/ci/builds.rb

@@ -62,14 +62,13 @@ FactoryGirl.define do
     trait :artifacts do
       after(:create) do |build, _|
         build.artifacts_file =
-          fixture_file_upload(Rails.root +
-                              'spec/fixtures/ci_build_artifacts.zip',
+          fixture_file_upload(Rails.root.join('spec/fixtures/ci_build_artifacts.zip'),
                              'application/zip')
 
         build.artifacts_metadata =
-          fixture_file_upload(Rails.root +
-                              'spec/fixtures/ci_build_artifacts_metadata.gz',
-                              'application/x-gzip')
+          fixture_file_upload(Rails.root.join('spec/fixtures/ci_build_artifacts_metadata.gz'),
+                            ' application/x-gzip')
+        
         build.save!
       end
     end

spec/models/build_spec.rb

@@ -497,6 +497,5 @@ describe Ci::Build, models: true do
         expect(@build2.merge_request.id).to eq(@merge_request.id)
       end
     end
-
   end
 end

spec/requests/ci/api/builds_spec.rb

@@ -148,6 +148,24 @@ describe Ci::API::API do
       end
     end
 
+    describe 'DELETE /builds/:id/content' do
+      before { delete ci_api("/builds/#{build.id}/content"), token: build.token }
+      let!(:build) { create(:ci_build_with_trace, :artifacts, :success) }
+
+      it 'should respond with valid status' do
+        expect(response.status).to eq 200
+      end
+
+      it 'should remove build artifacts' do
+        expect(build.artifacts_file.exists?).to be_falsy
+        expect(build.artifacts_metadata.exists?).to be_falsy
+      end
+
+      it 'should remove build trace' do
+        expect(build.trace).to be_empty
+      end
+    end
+
     context "Artifacts" do
       let(:file_upload) { fixture_file_upload(Rails.root + 'spec/fixtures/banana_sample.gif', 'image/gif') }
       let(:file_upload2) { fixture_file_upload(Rails.root + 'spec/fixtures/dk.png', 'image/gif') }