Simplify system hook testing and guarantee test will fire

The change in !11728 would cause an arbitrary project to be chosen to test
system hooks, and it's likely that the project would not have any commits or
relevant commits to test the hook. This would prevent admins from verifying
that the hook fired. Instead of trying to create a representative hook
dynamically, just send static data to guarantee the hook will actually be
tested.

Closes #37067

app/services/test_hooks/system_service.rb

@@ -2,47 +2,16 @@ module TestHooks
   class SystemService < TestHooks::BaseService
     private
 
-    def project
-      @project ||= begin
-        project = Project.first
-
-        throw(:validation_error, 'Ensure that at least one project exists.') unless project
-
-        project
-      end
-    end
-
     def push_events_data
-      if project.empty_repo?
-        throw(:validation_error, "Ensure project \"#{project.human_name}\" has commits.")
-      end
-
-      Gitlab::DataBuilder::Push.build_sample(project, current_user)
+      Gitlab::DataBuilder::Push.sample_data
     end
 
     def tag_push_events_data
-      if project.repository.tags.empty?
-        throw(:validation_error, "Ensure project \"#{project.human_name}\" has tags.")
-      end
-
-      Gitlab::DataBuilder::Push.build_sample(project, current_user)
+      Gitlab::DataBuilder::Push.sample_data
     end
 
     def repository_update_events_data
-      commit = project.commit
-      ref = "#{Gitlab::Git::BRANCH_REF_PREFIX}#{project.default_branch}"
-
-      unless commit
-        throw(:validation_error, "Ensure project \"#{project.human_name}\" has commits.")
-      end
-
-      change = Gitlab::DataBuilder::Repository.single_change(
-        commit.parent_id || Gitlab::Git::BLANK_SHA,
-        commit.id,
-        ref
-      )
-
-      Gitlab::DataBuilder::Repository.update(project, current_user, [change], [ref])
+      Gitlab::DataBuilder::Repository.sample_data
     end
   end
 end

lib/gitlab/data_builder/push.rb

@@ -3,6 +3,35 @@ module Gitlab
     module Push
       extend self
 
+      SAMPLE_DATA =
+        {
+          object_kind: "push",
+          event_name: "push",
+          before: "95790bf891e76fee5e1747ab589903a6a1f80f22",
+          after: "da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
+          ref: "refs/heads/master",
+          checkout_sha: "da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
+          message: "Hello World",
+          user_id: 4,
+          user_name: "John Smith",
+          user_email: "john@example.com",
+          user_avatar: "https://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=8://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=80",
+          project_id: 15,
+          commits: [
+            {
+              id: "c5feabde2d8cd023215af4d2ceeb7a64839fc428",
+              message: "Add simple search to projects in public area",
+              timestamp: "2013-05-13T18:18:08+00:00",
+              url: "https://test.example.com/gitlab/gitlabhq/commit/c5feabde2d8cd023215af4d2ceeb7a64839fc428",
+              author: {
+                name: "Test User",
+                email: "test@example.com"
+              }
+            }
+          ],
+          total_commits_count: 1
+        }.freeze
+
       # Produce a hash of post-receive data
       #
       # data = {
@@ -74,6 +103,10 @@ module Gitlab
         build(project, user, commits.last&.id, commits.first&.id, ref, commits)
       end
 
+      def sample_data
+        SAMPLE_DATA
+      end
+
       private
 
       def checkout_sha(repository, newrev, ref)

lib/gitlab/data_builder/repository.rb

@@ -3,6 +3,23 @@ module Gitlab
     module Repository
       extend self
 
+      SAMPLE_DATA = {
+        event_name: 'repository_update',
+        user_id: 10,
+        user_name: 'john.doe',
+        user_email: 'test@example.com',
+        user_avatar: 'http://example.com/avatar/user.png',
+        project_id: 40,
+        changes: [
+          {
+            before: "8205ea8d81ce0c6b90fbe8280d118cc9fdad6130",
+            after: "4045ea7a3df38697b3730a20fb73c8bed8a3e69e",
+            ref: "refs/heads/master"
+          }
+        ],
+        "refs": ["refs/heads/master"]
+      }.freeze
+
       # Produce a hash of post-receive data
       def update(project, user, changes, refs)
         {
@@ -30,6 +47,10 @@ module Gitlab
           ref: ref
         }
       end
+
+      def sample_data
+        SAMPLE_DATA
+      end
     end
   end
 end

spec/services/test_hooks/system_service_spec.rb

@@ -7,7 +7,6 @@ describe TestHooks::SystemService do
     let(:project) { create(:project, :repository) }
     let(:hook)    { create(:system_hook) }
     let(:service) { described_class.new(hook, current_user, trigger) }
-    let(:sample_data) { { data: 'sample' }}
     let(:success_result) { { status: :success, http_status: 200, message: 'ok' } }
 
     before do
@@ -26,18 +25,11 @@ describe TestHooks::SystemService do
     context 'push_events' do
       let(:trigger) { 'push_events' }
 
-      it 'returns error message if not enough data' do
-        allow(project).to receive(:empty_repo?).and_return(true)
-
-        expect(hook).not_to receive(:execute)
-        expect(service.execute).to include({ status: :error, message: "Ensure project \"#{project.human_name}\" has commits." })
-      end
-
       it 'executes hook' do
         allow(project).to receive(:empty_repo?).and_return(false)
-        allow(Gitlab::DataBuilder::Push).to receive(:build_sample).and_return(sample_data)
+        expect(Gitlab::DataBuilder::Push).to receive(:sample_data).and_call_original
 
-        expect(hook).to receive(:execute).with(sample_data, trigger).and_return(success_result)
+        expect(hook).to receive(:execute).with(Gitlab::DataBuilder::Push::SAMPLE_DATA, trigger).and_return(success_result)
         expect(service.execute).to include(success_result)
       end
     end
@@ -45,18 +37,11 @@ describe TestHooks::SystemService do
     context 'tag_push_events' do
       let(:trigger) { 'tag_push_events' }
 
-      it 'returns error message if not enough data' do
-        allow(project.repository).to receive(:tags).and_return([])
-
-        expect(hook).not_to receive(:execute)
-        expect(service.execute).to include({ status: :error, message: "Ensure project \"#{project.human_name}\" has tags." })
-      end
-
       it 'executes hook' do
         allow(project.repository).to receive(:tags).and_return(['tag'])
-        allow(Gitlab::DataBuilder::Push).to receive(:build_sample).and_return(sample_data)
+        expect(Gitlab::DataBuilder::Push).to receive(:sample_data).and_call_original
 
-        expect(hook).to receive(:execute).with(sample_data, trigger).and_return(success_result)
+        expect(hook).to receive(:execute).with(Gitlab::DataBuilder::Push::SAMPLE_DATA, trigger).and_return(success_result)
         expect(service.execute).to include(success_result)
       end
     end
@@ -64,17 +49,11 @@ describe TestHooks::SystemService do
     context 'repository_update_events' do
       let(:trigger) { 'repository_update_events' }
 
-      it 'returns error message if not enough data' do
-        allow(project).to receive(:commit).and_return(nil)
-        expect(hook).not_to receive(:execute)
-        expect(service.execute).to include({ status: :error, message: "Ensure project \"#{project.human_name}\" has commits." })
-      end
-
       it 'executes hook' do
         allow(project).to receive(:empty_repo?).and_return(false)
-        allow(Gitlab::DataBuilder::Repository).to receive(:update).and_return(sample_data)
+        expect(Gitlab::DataBuilder::Repository).to receive(:sample_data).and_call_original
 
-        expect(hook).to receive(:execute).with(sample_data, trigger).and_return(success_result)
+        expect(hook).to receive(:execute).with(Gitlab::DataBuilder::Repository::SAMPLE_DATA, trigger).and_return(success_result)
         expect(service.execute).to include(success_result)
       end
     end