Convert most MergeRequest model specs to use `:empty_project`

spec/models/merge_request_spec.rb

@@ -66,7 +66,7 @@ describe MergeRequest, models: true do
   end
 
   describe '#target_branch_sha' do
-    let(:project) { create(:project) }
+    let(:project) { create(:project, :repository) }
 
     subject { create(:merge_request, source_project: project, target_project: project) }
 
@@ -151,7 +151,7 @@ describe MergeRequest, models: true do
     end
 
     it 'supports a cross-project reference' do
-      another_project = build(:project, name: 'another-project', namespace: project.namespace)
+      another_project = build(:empty_project, name: 'another-project', namespace: project.namespace)
       expect(merge_request.to_reference(another_project)).to eq "sample-project!1"
     end
 
@@ -246,8 +246,8 @@ describe MergeRequest, models: true do
 
   describe '#for_fork?' do
     it 'returns true if the merge request is for a fork' do
-      subject.source_project = create(:project, namespace: create(:group))
-      subject.target_project = create(:project, namespace: create(:group))
+      subject.source_project = build_stubbed(:empty_project, namespace: create(:group))
+      subject.target_project = build_stubbed(:empty_project, namespace: create(:group))
 
       expect(subject.for_fork?).to be_truthy
     end
@@ -696,8 +696,8 @@ describe MergeRequest, models: true do
   end
 
   describe '#diverged_commits_count' do
-    let(:project)      { create(:project) }
-    let(:fork_project) { create(:project, forked_from_project: project) }
+    let(:project)      { create(:project, :repository) }
+    let(:fork_project) { create(:project, :repository, forked_from_project: project) }
 
     context 'when the target branch does not exist anymore' do
       subject { create(:merge_request, source_project: project, target_project: project) }
@@ -953,7 +953,7 @@ describe MergeRequest, models: true do
   end
 
   describe '#participants' do
-    let(:project) { create(:project, :public) }
+    let(:project) { create(:empty_project, :public) }
 
     let(:mr) do
       create(:merge_request, source_project: project, target_project: project)
@@ -994,7 +994,7 @@ describe MergeRequest, models: true do
   end
 
   describe '#check_if_can_be_merged' do
-    let(:project) { create(:project, only_allow_merge_if_build_succeeds: true) }
+    let(:project) { create(:empty_project, only_allow_merge_if_build_succeeds: true) }
 
     subject { create(:merge_request, source_project: project, merge_status: :unchecked) }
 
@@ -1028,7 +1028,7 @@ describe MergeRequest, models: true do
   end
 
   describe '#mergeable?' do
-    let(:project) { create(:project) }
+    let(:project) { create(:empty_project) }
 
     subject { create(:merge_request, source_project: project) }
 
@@ -1048,7 +1048,7 @@ describe MergeRequest, models: true do
   end
 
   describe '#mergeable_state?' do
-    let(:project) { create(:project) }
+    let(:project) { create(:project, :repository) }
 
     subject { create(:merge_request, source_project: project) }
 
@@ -1175,7 +1175,7 @@ describe MergeRequest, models: true do
     let(:merge_request) { create(:merge_request_with_diff_notes, source_project: project) }
 
     context 'when project.only_allow_merge_if_all_discussions_are_resolved == true' do
-      let(:project) { create(:project, only_allow_merge_if_all_discussions_are_resolved: true) }
+      let(:project) { create(:project, :repository, only_allow_merge_if_all_discussions_are_resolved: true) }
 
       context 'with all discussions resolved' do
         before do
@@ -1209,7 +1209,7 @@ describe MergeRequest, models: true do
     end
 
     context 'when project.only_allow_merge_if_all_discussions_are_resolved == false' do
-      let(:project) { create(:project, only_allow_merge_if_all_discussions_are_resolved: false) }
+      let(:project) { create(:project, :repository, only_allow_merge_if_all_discussions_are_resolved: false) }
 
       context 'with unresolved discussions' do
         before do
@@ -1224,7 +1224,7 @@ describe MergeRequest, models: true do
   end
 
   describe "#environments" do
-    let(:project)       { create(:project) }
+    let(:project)       { create(:project, :repository) }
     let(:merge_request) { create(:merge_request, source_project: project) }
 
     context 'with multiple environments' do
@@ -1242,7 +1242,7 @@ describe MergeRequest, models: true do
 
     context 'with environments on source project' do
       let(:source_project) do
-        create(:project) do |fork_project|
+        create(:project, :repository) do |fork_project|
           fork_project.create_forked_project_link(forked_to_project_id: fork_project.id, forked_from_project_id: project.id)
         end
       end
@@ -1825,8 +1825,8 @@ describe MergeRequest, models: true do
   end
 
   describe "#source_project_missing?" do
-    let(:project)      { create(:project) }
-    let(:fork_project) { create(:project, forked_from_project: project) }
+    let(:project)      { create(:empty_project) }
+    let(:fork_project) { create(:empty_project, forked_from_project: project) }
     let(:user)         { create(:user) }
     let(:unlink_project) { Projects::UnlinkForkService.new(fork_project, user) }
 
@@ -1863,8 +1863,8 @@ describe MergeRequest, models: true do
   end
 
   describe "#closed_without_fork?" do
-    let(:project)      { create(:project) }
-    let(:fork_project) { create(:project, forked_from_project: project) }
+    let(:project)      { create(:empty_project) }
+    let(:fork_project) { create(:empty_project, forked_from_project: project) }
     let(:user)         { create(:user) }
     let(:unlink_project) { Projects::UnlinkForkService.new(fork_project, user) }
 
@@ -1909,9 +1909,9 @@ describe MergeRequest, models: true do
       end
 
       context 'forked project' do
-        let(:project)      { create(:project) }
+        let(:project)      { create(:empty_project) }
         let(:user)         { create(:user) }
-        let(:fork_project) { create(:project, forked_from_project: project, namespace: user.namespace) }
+        let(:fork_project) { create(:empty_project, forked_from_project: project, namespace: user.namespace) }
 
         let!(:merge_request) do
           create(:closed_merge_request,