Replace the `project/ff_merge_requests.feature` spinach test with an rspec analog

changelogs/unreleased/blackst0ne-replace-spinach-project-ff-merge-requests-feature.yml

+---
+title: 'Replace the `project/ff_merge_requests.feature` spinach test with an rspec analog'
+merge_request: 18800
+author: '@blackst0ne'
+type: other

features/project/ff_merge_requests.feature

-Feature: Project Ff Merge Requests
-  Background:
-    Given I sign in as a user
-    And I own project "Shop"
-    And project "Shop" have "Bug NS-05" open merge request with diffs inside
-    And merge request "Bug NS-05" is mergeable
-
-  @javascript
-  Scenario: I do ff-only merge for rebased branch
-    Given ff merge enabled
-    And merge request "Bug NS-05" is rebased
-    When I visit merge request page "Bug NS-05"
-    Then I should see ff-only merge button
-    When I accept this merge request
-    Then I should see merged request
-
-  @javascript
-  Scenario: I do ff-only merge for merged branch
-    Given ff merge enabled
-    And merge request "Bug NS-05" merged target
-    When I visit merge request page "Bug NS-05"
-    Then I should see ff-only merge button
-    When I accept this merge request
-    Then I should see merged request
-
-  @javascript
-  Scenario: I do rebase before ff-only merge
-    Given ff merge enabled
-    And rebase before merge enabled
-    When I visit merge request page "Bug NS-05"
-    Then I should see rebase button
-    When I press rebase button
-    Then I should see rebase in progress message
-
-  @javascript
-  Scenario: I do rebase before regular merge
-    Given rebase before merge enabled
-    When I visit merge request page "Bug NS-05"
-    Then I should see rebase button
-    When I press rebase button
-    Then I should see rebase in progress message

features/steps/project/ff_merge_requests.rb

-class Spinach::Features::ProjectFfMergeRequests < Spinach::FeatureSteps
-  include SharedAuthentication
-  include SharedIssuable
-  include SharedProject
-  include SharedNote
-  include SharedPaths
-  include SharedMarkdown
-  include SharedDiffNote
-  include SharedUser
-  include WaitForRequests
-
-  step 'project "Shop" have "Bug NS-05" open merge request with diffs inside' do
-    create(:merge_request_with_diffs,
-           title: "Bug NS-05",
-           source_project: project,
-           target_project: project,
-           author: project.users.first)
-  end
-
-  step 'merge request is mergeable' do
-    expect(page).to have_button 'Merge'
-  end
-
-  step 'I should see ff-only merge button' do
-    expect(page).to have_content "Fast-forward merge without a merge commit"
-    expect(page).to have_button 'Merge'
-  end
-
-  step 'merge request "Bug NS-05" is mergeable' do
-    merge_request.mark_as_mergeable
-  end
-
-  step 'I accept this merge request' do
-    page.within '.mr-state-widget' do
-      click_button "Merge"
-    end
-  end
-
-  step 'I should see merged request' do
-    page.within '.status-box' do
-      expect(page).to have_content "Merged"
-      wait_for_requests
-    end
-  end
-
-  step 'ff merge enabled' do
-    project = merge_request.target_project
-    project.merge_requests_ff_only_enabled = true
-    project.save!
-  end
-
-  step 'I should see rebase button' do
-    expect(page).to have_button "Rebase"
-  end
-
-  step 'merge request "Bug NS-05" is rebased' do
-    merge_request.source_branch = 'flatten-dir'
-    merge_request.target_branch = 'improve/awesome'
-    merge_request.reload_diff
-    merge_request.save!
-  end
-
-  step 'merge request "Bug NS-05" merged target' do
-    merge_request.source_branch = 'merged-target'
-    merge_request.target_branch = 'improve/awesome'
-    merge_request.reload_diff
-    merge_request.save!
-  end
-
-  step 'rebase before merge enabled' do
-    project = merge_request.target_project
-    project.merge_requests_rebase_enabled = true
-    project.save!
-  end
-
-  step 'I press rebase button' do
-    click_button "Rebase"
-  end
-
-  step "I should see rebase in progress message" do
-    expect(page).to have_content("Rebase in progress")
-  end
-
-  def merge_request
-    @merge_request ||= MergeRequest.find_by!(title: "Bug NS-05")
-  end
-end

features/steps/shared/paths.rb

@@ -336,11 +336,6 @@ module SharedPaths
     wait_for_requests
   end
 
-  step 'I visit merge request page "Bug NS-05"' do
-    visit merge_request_path("Bug NS-05")
-    wait_for_requests
-  end
-
   step 'I visit merge request page "Bug NS-07"' do
     visit merge_request_path("Bug NS-07")
     wait_for_requests

spec/factories/merge_requests.rb

@@ -41,6 +41,11 @@ FactoryBot.define do
       state :merged
     end
 
+    trait :merged_target do
+      source_branch "merged-target"
+      target_branch "improve/awesome"
+    end
+
     trait :closed do
       state :closed
     end

spec/features/projects/merge_requests/user_merges_merge_request_spec.rb

+require "spec_helper"
+
+describe "User merges a merge request", :js do
+  let(:user) { project.owner }
+
+  before do
+    sign_in(user)
+  end
+
+  shared_examples "fast forward merge a merge request" do
+    it "merges a merge request" do
+      expect(page).to have_content("Fast-forward merge without a merge commit").and have_button("Merge")
+
+      page.within(".mr-state-widget") do
+        click_button("Merge")
+      end
+
+      page.within(".status-box") do
+        expect(page).to have_content("Merged")
+      end
+    end
+  end
+
+  context "ff-only merge" do
+    let(:project) { create(:project, :public, :repository, merge_requests_ff_only_enabled: true) }
+
+    before do
+      visit(merge_request_path(merge_request))
+    end
+
+    context "when branch is rebased" do
+      let!(:merge_request) { create(:merge_request, :rebased, source_project: project) }
+
+      it_behaves_like "fast forward merge a merge request"
+    end
+
+    context "when branch is merged" do
+      let!(:merge_request) { create(:merge_request, :merged_target, source_project: project) }
+
+      it_behaves_like "fast forward merge a merge request"
+    end
+  end
+end

spec/features/projects/merge_requests/user_rebases_merge_request_spec.rb

+require "spec_helper"
+
+describe "User rebases a merge request", :js do
+  let(:merge_request) { create(:merge_request, :simple, source_project: project) }
+  let(:user) { project.owner }
+
+  before do
+    sign_in(user)
+  end
+
+  shared_examples "rebases" do
+    it "rebases" do
+      visit(merge_request_path(merge_request))
+
+      expect(page).to have_button("Rebase")
+
+      click_button("Rebase")
+
+      expect(page).to have_content("Rebase in progress")
+    end
+  end
+
+  context "when merge is regular" do
+    let(:project) { create(:project, :public, :repository, merge_requests_rebase_enabled: true) }
+
+    it_behaves_like "rebases"
+  end
+
+  context "when merge is ff-only" do
+    let(:project) { create(:project, :public, :repository, merge_requests_ff_only_enabled: true) }
+
+    it_behaves_like "rebases"
+  end
+end