Merge branch 'jswain_upload_button' into 'master'

Allow uploads from empty repo state [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!52755

app/assets/javascripts/blob/blob_file_dropzone.js

@@ -3,6 +3,7 @@
 import Dropzone from 'dropzone';
 import $ from 'jquery';
 import { sprintf, __ } from '~/locale';
+import { trackUploadFileFormSubmitted } from '~/projects/upload_file_experiment';
 import { HIDDEN_CLASS } from '../lib/utils/constants';
 import csrf from '../lib/utils/csrf';
 import { visitUrl } from '../lib/utils/url_utility';
@@ -83,6 +84,9 @@ export default class BlobFileDropzone {
     submitButton.on('click', (e) => {
       e.preventDefault();
       e.stopPropagation();
+
+      trackUploadFileFormSubmitted();
+
       if (dropzone[0].dropzone.getQueuedFiles().length === 0) {
         // eslint-disable-next-line no-alert
         alert(__('Please select a file'));

app/assets/javascripts/blob_edit/blob_bundle.js

@@ -4,6 +4,7 @@ import $ from 'jquery';
 import initPopover from '~/blob/suggest_gitlab_ci_yml';
 import { deprecatedCreateFlash as createFlash } from '~/flash';
 import { disableButtonIfEmptyField, setCookie } from '~/lib/utils/common_utils';
+import { initUploadFileTrigger } from '~/projects/upload_file_experiment';
 import Tracking from '~/tracking';
 import BlobFileDropzone from '../blob/blob_file_dropzone';
 import NewCommitForm from '../new_commit_form';
@@ -47,6 +48,7 @@ export const initUploadForm = () => {
     new NewCommitForm(uploadBlobForm);
 
     disableButtonIfEmptyField(uploadBlobForm.find('.js-commit-message'), '.btn-upload-file');
+    initUploadFileTrigger();
   }
 };
 

app/assets/javascripts/experiment_tracking.js

+import { get } from 'lodash';
+import Tracking from '~/tracking';
+
+const TRACKING_CONTEXT_SCHEMA = 'iglu:com.gitlab/gitlab_experiment/jsonschema/1-0-0';
+
+export default class ExperimentTracking {
+  constructor(experimentName, { label } = {}) {
+    this.label = label;
+    this.experimentData = get(window, ['gon', 'global', 'experiment', experimentName]);
+  }
+
+  event(action) {
+    if (!this.experimentData) {
+      return false;
+    }
+
+    return Tracking.event(document.body.dataset.page, action, {
+      label: this.label,
+      context: {
+        schema: TRACKING_CONTEXT_SCHEMA,
+        data: this.experimentData,
+      },
+    });
+  }
+}

app/assets/javascripts/pages/projects/show/index.js

@@ -24,9 +24,12 @@ new UserCallout({
 });
 
 // Project show page loads different overview content based on user preferences
-const treeSlider = document.getElementById('js-tree-list');
-if (treeSlider) {
+
+if (document.querySelector('.js-upload-blob-form')) {
   initUploadForm();
+}
+
+if (document.getElementById('js-tree-list')) {
   initTree();
 }
 

app/assets/javascripts/projects/upload_file_experiment.js

+import ExperimentTracking from '~/experiment_tracking';
+
+function trackEvent(eventName) {
+  const Tracking = new ExperimentTracking('empty_repo_upload', { label: 'blob-upload-modal' });
+
+  Tracking.event(eventName);
+}
+
+export function initUploadFileTrigger() {
+  const uploadFileTriggerEl = document.querySelector('.js-upload-file-experiment-trigger');
+
+  if (uploadFileTriggerEl) {
+    uploadFileTriggerEl.addEventListener('click', () => {
+      trackEvent('click_upload_modal_trigger');
+    });
+  }
+}
+
+export function trackUploadFileFormSubmitted() {
+  trackEvent('click_upload_modal_form_submit');
+}

app/controllers/projects_controller.rb

@@ -329,6 +329,8 @@ class ProjectsController < Projects::ApplicationController
     if can?(current_user, :download_code, @project)
       return render 'projects/no_repo' unless @project.repository_exists?
 
+      experiment(:empty_repo_upload, project: @project).track(:view_project_show) if @project.can_current_user_push_to_default_branch?
+
       if @project.empty_repo?
         record_experiment_user(:invite_members_empty_project_version_a)
 

app/helpers/stat_anchors_helper.rb

@@ -5,13 +5,14 @@ module StatAnchorsHelper
     {}.tap do |attrs|
       attrs[:class] = %w(nav-link gl-display-flex gl-align-items-center) << extra_classes(anchor)
       attrs[:itemprop] = anchor.itemprop if anchor.itemprop
+      attrs[:data] = anchor.data if anchor.data
     end
   end
 
   private
 
   def button_attribute(anchor)
-    "btn-#{anchor.class_modifier || 'dashed'}"
+    anchor.class_modifier || 'btn-dashed'
   end
 
   def extra_classes(anchor)

app/presenters/project_presenter.rb

@@ -10,10 +10,11 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
   include BlobHelper
   include ChecksCollaboration
   include Gitlab::Utils::StrongMemoize
+  include Gitlab::Experiment::Dsl
 
   presents :project
 
-  AnchorData = Struct.new(:is_link, :label, :link, :class_modifier, :icon, :itemprop)
+  AnchorData = Struct.new(:is_link, :label, :link, :class_modifier, :icon, :itemprop, :data)
   MAX_TOPICS_TO_SHOW = 3
 
   def statistic_icon(icon_name = 'plus-square-o')
@@ -33,6 +34,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
 
   def statistics_buttons(show_auto_devops_callout:)
     [
+      upload_anchor_data,
       readme_anchor_data,
       license_anchor_data,
       changelog_anchor_data,
@@ -49,6 +51,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
 
   def empty_repo_statistics_buttons
     [
+      upload_anchor_data,
       new_file_anchor_data,
       readme_anchor_data,
       license_anchor_data,
@@ -154,6 +157,8 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
   end
 
   def can_current_user_push_to_branch?(branch)
+    return false unless current_user
+
     user_access(project).can_push_to_branch?(branch)
   end
 
@@ -232,19 +237,47 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
                    empty_repo? ? nil : project_tags_path(project))
   end
 
+  def upload_anchor_data
+    strong_memoize(:upload_anchor_data) do
+      next unless can_current_user_push_to_default_branch?
+
+      experiment(:empty_repo_upload, project: project) do |e|
+        e.use {}
+        e.try do
+          AnchorData.new(false,
+                         statistic_icon('upload') + _('Upload file'),
+                         '#modal-upload-blob',
+                         'js-upload-file-experiment-trigger',
+                         nil,
+                         nil,
+                         {
+                           'toggle' => 'modal',
+                           'target' => '#modal-upload-blob'
+                         }
+                        )
+        end
+        e.run
+      end
+    end
+  end
+
+  def empty_repo_upload_experiment?
+    upload_anchor_data.present?
+  end
+
   def new_file_anchor_data
-    if current_user && can_current_user_push_to_default_branch?
+    if can_current_user_push_to_default_branch?
       new_file_path = empty_repo? ? ide_edit_path(project, default_branch_or_master) : project_new_blob_path(project, default_branch_or_master)
 
       AnchorData.new(false,
                      statistic_icon + _('New file'),
                      new_file_path,
-                     'dashed')
+                     'btn-dashed')
     end
   end
 
   def readme_anchor_data
-    if current_user && can_current_user_push_to_default_branch? && readme_path.nil?
+    if can_current_user_push_to_default_branch? && readme_path.nil?
       AnchorData.new(false,
                      statistic_icon + _('Add README'),
                      empty_repo? ? add_readme_ide_path : add_readme_path)
@@ -252,13 +285,13 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
       AnchorData.new(false,
                      statistic_icon('doc-text') + _('README'),
                      default_view != 'readme' ? readme_path : '#readme',
-                    'default',
+                    'btn-default',
                     'doc-text')
     end
   end
 
   def changelog_anchor_data
-    if current_user && can_current_user_push_to_default_branch? && repository.changelog.blank?
+    if can_current_user_push_to_default_branch? && repository.changelog.blank?
       AnchorData.new(false,
                      statistic_icon + _('Add CHANGELOG'),
                      empty_repo? ? add_changelog_ide_path : add_changelog_path)
@@ -266,7 +299,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
       AnchorData.new(false,
                      statistic_icon('doc-text') + _('CHANGELOG'),
                      changelog_path,
-                    'default')
+                    'btn-default')
     end
   end
 
@@ -277,11 +310,11 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
       AnchorData.new(false,
                      icon + content_tag(:span, license_short_name, class: 'project-stat-value'),
                      license_path,
-                     'default',
+                     'btn-default',
                      nil,
                      'license')
     else
-      if current_user && can_current_user_push_to_default_branch?
+      if can_current_user_push_to_default_branch?
         AnchorData.new(false,
                        content_tag(:span, statistic_icon + _('Add LICENSE'), class: 'add-license-link d-flex'),
                        empty_repo? ? add_license_ide_path : add_license_path)
@@ -294,7 +327,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
   end
 
   def contribution_guide_anchor_data
-    if current_user && can_current_user_push_to_default_branch? && repository.contribution_guide.blank?
+    if can_current_user_push_to_default_branch? && repository.contribution_guide.blank?
       AnchorData.new(false,
                      statistic_icon + _('Add CONTRIBUTING'),
                      empty_repo? ? add_contribution_guide_ide_path : add_contribution_guide_path)
@@ -302,7 +335,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
       AnchorData.new(false,
                      statistic_icon('doc-text') + _('CONTRIBUTING'),
                      contribution_guide_path,
-                     'default')
+                     'btn-default')
     end
   end
 
@@ -312,7 +345,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
         AnchorData.new(false,
                        statistic_icon('settings') + _('Auto DevOps enabled'),
                        project_settings_ci_cd_path(project, anchor: 'autodevops-settings'),
-                       'default')
+                       'btn-default')
       else
         AnchorData.new(false,
                        statistic_icon + _('Enable Auto DevOps'),
@@ -337,7 +370,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
         AnchorData.new(false,
                        _('Kubernetes'),
                        cluster_link,
-                      'default')
+                      'btn-default')
       end
     end
   end
@@ -351,7 +384,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
       AnchorData.new(false,
                      statistic_icon('doc-text') + _('CI/CD configuration'),
                      ci_configuration_path,
-                    'default')
+                    'btn-default')
     end
   end
 

app/views/projects/blob/_upload.html.haml

@@ -17,7 +17,7 @@
           %br
           .dropzone-alerts.gl-alert.gl-alert-danger.gl-mb-5.data{ style: "display:none" }
 
-          = render 'shared/new_commit_form', placeholder: placeholder
+          = render 'shared/new_commit_form', placeholder: placeholder, ref: local_assigns[:ref]
 
           .form-actions
             = button_tag class: 'btn gl-button btn-success btn-upload-file', id: 'submit-all', type: 'button' do

app/views/projects/empty.html.haml

 - @content_class = "limit-container-width" unless fluid_layout
-- default_branch_name = @project.default_branch || "master"
+- default_branch_name = @project.default_branch_or_master
 - @skip_current_level_breadcrumb = true
 
 = content_for :invite_members_sidebar do
@@ -77,3 +77,6 @@
             %span><
               git push -u origin --all
               git push -u origin --tags
+
+- if @project.empty_repo_upload_experiment?
+  = render 'projects/blob/upload', title: _('Upload New File'), placeholder: _('Upload New File'), button_title: _('Upload file'), form_path: project_create_blob_path(@project, default_branch_name), ref: default_branch_name, method: :post

app/views/shared/_new_commit_form.html.haml

@@ -3,8 +3,11 @@
 
 = render 'shared/commit_message_container', placeholder: placeholder
 
-- if @project.empty_repo?
-  = hidden_field_tag 'branch_name', @ref
+- if project.empty_repo?
+  - ref = local_assigns[:ref] || @ref
+  - branch_name_class = project.empty_repo_upload_experiment? ? 'js-branch-name' : nil
+
+  = hidden_field_tag 'branch_name', ref, class: branch_name_class
 - else
   - if can?(current_user, :push_code, @project)
     .form-group.row.branch

app/workers/post_receive.rb

@@ -123,6 +123,7 @@ class PostReceive # rubocop:disable Scalability/IdempotentWorker
 
   def after_project_changes_hooks(project, user, refs, changes)
     experiment(:new_project_readme, actor: user).track_initial_writes(project)
+    experiment(:empty_repo_upload, project: project).track(:initial_write) if project.empty_repo?
     repository_update_hook_data = Gitlab::DataBuilder::Repository.update(project, user, changes, refs)
     SystemHooksService.new.execute_hooks(repository_update_hook_data, :repository_update_hooks)
     Gitlab::UsageDataCounters::SourceCodeCounter.count(:pushes)

config/feature_flags/experiment/empty_repo_upload.yml

+---
+name: empty_repo_upload
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/52755
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/285296
+milestone: '13.9'
+type: experiment
+group: group::adoption
+default_enabled: false

spec/controllers/projects_controller_spec.rb

@@ -221,6 +221,20 @@ RSpec.describe ProjectsController do
         allow(controller).to receive(:record_experiment_user)
       end
 
+      context 'when user can push to default branch' do
+        let(:user) { empty_project.owner }
+
+        it 'creates an "view_project_show" experiment tracking event', :snowplow do
+          allow_next_instance_of(ApplicationExperiment) do |e|
+            allow(e).to receive(:should_track?).and_return(true)
+          end
+
+          get :show, params: { namespace_id: empty_project.namespace, id: empty_project }
+
+          expect_snowplow_event(category: 'empty_repo_upload', action: 'view_project_show', context: [{ schema: 'iglu:com.gitlab/gitlab_experiment/jsonschema/0-3-0', data: anything }])
+        end
+      end
+
       User.project_views.keys.each do |project_view|
         context "with #{project_view} view set" do
           before do

spec/features/projects/show/user_uploads_files_spec.rb

@@ -33,4 +33,34 @@ RSpec.describe 'Projects > Show > User uploads files' do
 
     include_examples 'it uploads and commit a new file to a forked project'
   end
+
+  context 'with an empty repo' do
+    let(:project) { create(:project, :empty_repo, creator: user) }
+
+    context 'when in the empty_repo_upload experiment' do
+      before do
+        stub_experiments(empty_repo_upload: :candidate)
+
+        visit(project_path(project))
+      end
+
+      it 'uploads and commits a new text file', :js do
+        click_link('Upload file')
+
+        drop_in_dropzone(File.join(Rails.root, 'spec', 'fixtures', 'doc_sample.txt'))
+
+        page.within('#modal-upload-blob') do
+          fill_in(:commit_message, with: 'New commit message')
+        end
+
+        click_button('Upload file')
+
+        wait_for_requests
+
+        expect(page).to have_content('New commit message')
+        expect(page).to have_content('Lorem ipsum dolor sit amet')
+        expect(page).to have_content('Sed ut perspiciatis unde omnis')
+      end
+    end
+  end
 end

spec/frontend/blob/blob_file_dropzone_spec.js

 import $ from 'jquery';
 import BlobFileDropzone from '~/blob/blob_file_dropzone';
+import { trackUploadFileFormSubmitted } from '~/projects/upload_file_experiment';
+
+jest.mock('~/projects/upload_file_experiment', () => ({
+  trackUploadFileFormSubmitted: jest.fn(),
+}));
 
 describe('BlobFileDropzone', () => {
   preloadFixtures('blob/show.html');
@@ -41,5 +46,13 @@ describe('BlobFileDropzone', () => {
       expect(replaceFileButton.is(':disabled')).toEqual(true);
       expect(dropzone.processQueue).toHaveBeenCalled();
     });
+
+    it('calls the tracking event', () => {
+      jest.spyOn(window, 'alert').mockImplementation(() => {});
+
+      replaceFileButton.click();
+
+      expect(trackUploadFileFormSubmitted).toHaveBeenCalled();
+    });
   });
 });

spec/frontend/experiment_tracking_spec.js

+import ExperimentTracking from '~/experiment_tracking';
+import Tracking from '~/tracking';
+
+jest.mock('~/tracking');
+
+const oldGon = window.gon;
+
+let experimentTracking;
+let label;
+let newGon = {};
+
+const setup = () => {
+  window.gon = newGon;
+  experimentTracking = new ExperimentTracking('sidebar_experiment', label);
+};
+
+beforeEach(() => {
+  document.body.dataset.page = 'issues-page';
+});
+
+afterEach(() => {
+  window.gon = oldGon;
+  Tracking.mockClear();
+  label = undefined;
+});
+
+describe('event', () => {
+  describe('when experiment data exists for experimentName', () => {
+    beforeEach(() => {
+      newGon = { global: { experiment: { sidebar_experiment: 'experiment-data' } } };
+      setup();
+    });
+
+    describe('when providing options', () => {
+      label = { label: 'sidebar-drawer' };
+
+      it('passes them to the tracking call', () => {
+        experimentTracking.event('click_sidebar_close');
+
+        expect(Tracking.event).toHaveBeenCalledTimes(1);
+        expect(Tracking.event).toHaveBeenCalledWith('issues-page', 'click_sidebar_close', {
+          label: 'sidebar-drawer',
+          context: {
+            schema: 'iglu:com.gitlab/gitlab_experiment/jsonschema/1-0-0',
+            data: 'experiment-data',
+          },
+        });
+      });
+    });
+
+    it('tracks with the correct context', () => {
+      experimentTracking.event('click_sidebar_trigger');
+
+      expect(Tracking.event).toHaveBeenCalledTimes(1);
+      expect(Tracking.event).toHaveBeenCalledWith('issues-page', 'click_sidebar_trigger', {
+        label: undefined,
+        context: {
+          schema: 'iglu:com.gitlab/gitlab_experiment/jsonschema/1-0-0',
+          data: 'experiment-data',
+        },
+      });
+    });
+  });
+
+  describe('when experiment data does NOT exists for the experimentName', () => {
+    beforeEach(() => {
+      newGon = { global: { experiment: { unrelated_experiment: 'not happening' } } };
+      setup();
+    });
+
+    it('does not track', () => {
+      experimentTracking.event('click_sidebar_close');
+
+      expect(Tracking.event).not.toHaveBeenCalled();
+    });
+  });
+});

spec/frontend/projects/upload_file_experiment_spec.js

+import ExperimentTracking from '~/experiment_tracking';
+import * as UploadFileExperiment from '~/projects/upload_file_experiment';
+
+const mockExperimentTrackingEvent = jest.fn();
+jest.mock('~/experiment_tracking', () =>
+  jest.fn().mockImplementation(() => ({
+    event: mockExperimentTrackingEvent,
+  })),
+);
+
+const fixture = `<a class='js-upload-file-experiment-trigger' data-toggle='modal' data-target='#modal-upload-blob'></a><div id='modal-upload-blob'></div>`;
+const findModal = () => document.querySelector('[aria-modal="true"]');
+const findTrigger = () => document.querySelector('.js-upload-file-experiment-trigger');
+
+beforeEach(() => {
+  ExperimentTracking.mockClear();
+  mockExperimentTrackingEvent.mockClear();
+
+  document.body.innerHTML = fixture;
+});
+
+afterEach(() => {
+  document.body.innerHTML = '';
+});
+
+describe('trackUploadFileFormSubmitted', () => {
+  it('initializes ExperimentTracking with the correct arguments and calls the tracking event with correct arguments', () => {
+    UploadFileExperiment.trackUploadFileFormSubmitted();
+
+    expect(ExperimentTracking).toHaveBeenCalledWith('empty_repo_upload', {
+      label: 'blob-upload-modal',
+    });
+    expect(mockExperimentTrackingEvent).toHaveBeenCalledWith('click_upload_modal_form_submit');
+  });
+});
+
+describe('initUploadFileTrigger', () => {
+  it('calls modal and tracks event', () => {
+    UploadFileExperiment.initUploadFileTrigger();
+
+    expect(findModal()).not.toExist();
+    findTrigger().click();
+    expect(findModal()).toExist();
+    expect(mockExperimentTrackingEvent).toHaveBeenCalledWith('click_upload_modal_trigger');
+  });
+});

spec/helpers/stat_anchors_helper_spec.rb

@@ -18,7 +18,7 @@ RSpec.describe StatAnchorsHelper do
 
     context 'when anchor is not a link' do
       context 'when class_modifier is set' do
-        let(:anchor) { anchor_klass.new(false, nil, nil, 'default') }
+        let(:anchor) { anchor_klass.new(false, nil, nil, 'btn-default') }
 
         it 'returns the proper attributes' do
           expect(subject[:class]).to include('gl-button btn btn-default')
@@ -49,5 +49,21 @@ RSpec.describe StatAnchorsHelper do
         expect(subject[:itemprop]).to eq true
       end
     end
+
+    context 'when data is not set' do
+      let(:anchor) { anchor_klass.new(false, nil, nil, nil, nil, nil, nil) }
+
+      it 'returns the data attributes' do
+        expect(subject[:data]).to be_nil
+      end
+    end
+
+    context 'when itemprop is set' do
+      let(:anchor) { anchor_klass.new(false, nil, nil, nil, nil, nil, { 'toggle' => 'modal' }) }
+
+      it 'returns the data attributes' do
+        expect(subject[:data]).to eq({ 'toggle' => 'modal' })
+      end
+    end
   end
 end

spec/presenters/project_presenter_spec.rb

@@ -183,6 +183,14 @@ RSpec.describe ProjectPresenter do
     context 'not empty repo' do
       let(:project) { create(:project, :repository) }
 
+      context 'if no current user' do
+        let(:user) { nil }
+
+        it 'returns false' do
+          expect(presenter.can_current_user_push_code?).to be(false)
+        end
+      end
+
       it 'returns true if user can push to default branch' do
         project.add_developer(user)
 
@@ -350,7 +358,7 @@ RSpec.describe ProjectPresenter do
           is_link: false,
           label: a_string_including("New file"),
           link: presenter.project_new_blob_path(project, 'master'),
-          class_modifier: 'dashed'
+          class_modifier: 'btn-dashed'
         )
       end
 
@@ -597,10 +605,12 @@ RSpec.describe ProjectPresenter do
       context 'for a developer' do
         before do
           project.add_developer(user)
+          stub_experiments(empty_repo_upload: :candidate)
         end
 
         it 'orders the items correctly' do
           expect(empty_repo_statistics_buttons.map(&:label)).to start_with(
+            a_string_including('Upload'),
             a_string_including('New'),
             a_string_including('README'),
             a_string_including('LICENSE'),
@@ -609,6 +619,16 @@ RSpec.describe ProjectPresenter do
             a_string_including('CI/CD')
           )
         end
+
+        context 'when not in the upload experiment' do
+          before do
+            stub_experiments(empty_repo_upload: :control)
+          end
+
+          it 'does not include upload button' do
+            expect(empty_repo_statistics_buttons.map(&:label)).not_to start_with(a_string_including('Upload'))
+          end
+        end
       end
     end
 
@@ -694,4 +714,20 @@ RSpec.describe ProjectPresenter do
       end
     end
   end
+
+  describe 'empty_repo_upload_experiment?' do
+    subject { presenter.empty_repo_upload_experiment? }
+
+    it 'returns false when upload_anchor_data is nil' do
+      allow(presenter).to receive(:upload_anchor_data).and_return(nil)
+
+      expect(subject).to be false
+    end
+
+    it 'returns true when upload_anchor_data exists' do
+      allow(presenter).to receive(:upload_anchor_data).and_return(true)
+
+      expect(subject).to be true
+    end
+  end
 end

spec/support/shared_examples/features/project_upload_files_shared_examples.rb

@@ -3,7 +3,13 @@
 RSpec.shared_examples 'it uploads and commit a new text file' do
   it 'uploads and commit a new text file', :js do
     find('.add-to-tree').click
+
+    page.within('.dropdown-menu') do
       click_link('Upload file')
+
+      wait_for_requests
+    end
+
     drop_in_dropzone(File.join(Rails.root, 'spec', 'fixtures', 'doc_sample.txt'))
 
     page.within('#modal-upload-blob') do
@@ -29,7 +35,13 @@ end
 RSpec.shared_examples 'it uploads and commit a new image file' do
   it 'uploads and commit a new image file', :js do
     find('.add-to-tree').click
+
+    page.within('.dropdown-menu') do
       click_link('Upload file')
+
+      wait_for_requests
+    end
+
     drop_in_dropzone(File.join(Rails.root, 'spec', 'fixtures', 'logo_sample.svg'))
 
     page.within('#modal-upload-blob') do

spec/workers/post_receive_spec.rb

@@ -93,6 +93,29 @@ RSpec.describe PostReceive do
 
         perform
       end
+
+      it 'tracks an event for the empty_repo_upload experiment', :snowplow do
+        allow_next_instance_of(ApplicationExperiment) do |e|
+          allow(e).to receive(:should_track?).and_return(true)
+          allow(e).to receive(:track_initial_writes)
+        end
+
+        perform
+
+        expect_snowplow_event(category: 'empty_repo_upload', action: 'initial_write', context: [{ schema: 'iglu:com.gitlab/gitlab_experiment/jsonschema/0-3-0', data: anything }])
+      end
+
+      it 'does not track an event for the empty_repo_upload experiment when project is not empty', :snowplow do
+        allow(empty_project).to receive(:empty_repo?).and_return(false)
+        allow_next_instance_of(ApplicationExperiment) do |e|
+          allow(e).to receive(:should_track?).and_return(true)
+          allow(e).to receive(:track_initial_writes)
+        end
+
+        perform
+
+        expect_no_snowplow_event
+      end
     end
 
     shared_examples 'not updating remote mirrors' do
@@ -159,7 +182,7 @@ RSpec.describe PostReceive do
         end
 
         it 'expires the status cache' do
-          expect(project.repository).to receive(:empty?).and_return(true)
+          expect(project.repository).to receive(:empty?).at_least(:once).and_return(true)
           expect(project.repository).to receive(:expire_status_cache)
 
           perform