New directory from interface on existing branch

app/controllers/projects/application_controller.rb

@@ -89,4 +89,9 @@ class Projects::ApplicationController < ApplicationController
   def builds_enabled
     return render_404 unless @project.feature_available?(:builds, current_user)
   end
+
+  def update_ref
+    branch_exists = @repository.find_branch(@target_branch)
+    @ref = @target_branch if branch_exists
+  end
 end

app/controllers/projects/blob_controller.rb

@@ -89,11 +89,6 @@ class Projects::BlobController < Projects::ApplicationController
 
   private
 
-  def update_ref
-    branch_exists = @repository.find_branch(@target_branch)
-    @ref = @target_branch if branch_exists
-  end
-
   def blob
     @blob ||= Blob.decorate(@repository.blob_at(@commit.id, @path))
 

app/controllers/projects/tree_controller.rb

@@ -34,6 +34,7 @@ class Projects::TreeController < Projects::ApplicationController
   def create_dir
     return render_404 unless @commit_params.values.all?
 
+    update_ref
     create_commit(Files::CreateDirService,  success_notice: "The directory has been successfully created.",
                                             success_path: namespace_project_tree_path(@project.namespace, @project, File.join(@target_branch, @dir_name)),
                                             failure_path: namespace_project_tree_path(@project.namespace, @project, @ref))

changelogs/unreleased/29428-new-directory-from-existing-branch.yml

+---
+title: New directory from interface on existing branch
+merge_request: 9921
+author: Jacopo Beschi @jacopo-beschi

spec/features/projects/blobs/user_create_spec.rb

@@ -2,6 +2,7 @@ require 'spec_helper'
 
 feature 'New blob creation', feature: true, js: true do
   include WaitForAjax
+  include TargetBranchHelpers
 
   given(:user) { create(:user) }
   given(:role) { :developer }
@@ -20,19 +21,6 @@ feature 'New blob creation', feature: true, js: true do
     execute_script("ace.edit('editor').setValue('#{content}')")
   end
 
-  def select_branch_index(index)
-    first('button.js-target-branch').click
-    wait_for_ajax
-    all('a[data-group="Branches"]')[index].click
-  end
-
-  def create_new_branch(name)
-    first('button.js-target-branch').click
-    click_link 'Create new branch'
-    fill_in 'new_branch_name', with: name
-    click_button 'Create'
-  end
-
   def commit_file
     click_button 'Commit Changes'
   end
@@ -53,12 +41,12 @@ feature 'New blob creation', feature: true, js: true do
   context 'with different target branch' do
     background do
       edit_file
-      select_branch_index(0)
+      select_branch('feature')
       commit_file
     end
 
     scenario 'creates the blob in the different branch' do
-      expect(page).to have_content 'test'
+      expect(page).to have_content 'feature'
       expect(page).to have_content 'successfully created'
     end
   end

spec/features/projects/user_create_dir_spec.rb

+require 'spec_helper'
+
+feature 'New directory creation', feature: true, js: true do
+  include WaitForAjax
+  include TargetBranchHelpers
+
+  given(:user) { create(:user) }
+  given(:role) { :developer }
+  given(:project) { create(:project) }
+
+  background do
+    login_as(user)
+    project.team << [user, role]
+    visit namespace_project_tree_path(project.namespace, project, 'master')
+    open_new_directory_modal
+    fill_in 'dir_name', with: 'new_directory'
+  end
+
+  def open_new_directory_modal
+    first('.add-to-tree').click
+    click_link 'New directory'
+  end
+
+  def create_directory
+    click_button 'Create directory'
+  end
+
+  context 'with default target branch' do
+    background do
+      create_directory
+    end
+
+    scenario 'creates the directory in the default branch' do
+      expect(page).to have_content 'master'
+      expect(page).to have_content 'The directory has been successfully created'
+      expect(page).to have_content 'new_directory'
+    end
+  end
+
+  context 'with different target branch' do
+    background do
+      select_branch('feature')
+      create_directory
+    end
+
+    scenario 'creates the directory in the different branch' do
+      expect(page).to have_content 'feature'
+      expect(page).to have_content 'The directory has been successfully created'
+    end
+  end
+
+  context 'with a new target branch' do
+    given(:new_branch_name) { 'new-feature' }
+
+    background do
+      create_new_branch(new_branch_name)
+      create_directory
+    end
+
+    scenario 'creates the directory in the new branch' do
+      expect(page).to have_content new_branch_name
+      expect(page).to have_content 'The directory has been successfully created'
+    end
+
+    scenario 'redirects to the merge request' do
+      expect(page).to have_content 'New Merge Request'
+      expect(page).to have_content "From #{new_branch_name} into master"
+      expect(page).to have_content 'Add new directory'
+      expect(current_path).to eq(new_namespace_project_merge_request_path(project.namespace, project))
+    end
+  end
+end

spec/support/target_branch_helpers.rb

+module TargetBranchHelpers
+  def select_branch(name)
+    first('button.js-target-branch').click
+    wait_for_ajax
+    all('a[data-group="Branches"]').find do |el|
+      el.text == name
+    end.click
+  end
+
+  def create_new_branch(name)
+    first('button.js-target-branch').click
+    click_link 'Create new branch'
+    fill_in 'new_branch_name', with: name
+    click_button 'Create'
+  end
+end