Add latest changes from gitlab-org/gitlab@15-9-stable-eev15.9.0-rc42

1 files changed, 124 insertions, 0 deletions

diff --git a/spec/initializers/check_forced_decomposition_spec.rb b/spec/initializers/check_forced_decomposition_spec.rb
new file mode 100644
index 00000000000..a216f078932
--- /dev/null
+++ b/spec/initializers/check_forced_decomposition_spec.rb
@@ -0,0 +1,124 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'check_forced_decomposition initializer', feature_category: :pods do
+  subject(:check_forced_decomposition) do
+    load Rails.root.join('config/initializers/check_forced_decomposition.rb')
+  end
+
+  before do
+    stub_env('GITLAB_ALLOW_SEPARATE_CI_DATABASE', nil)
+  end
+
+  context 'for production env' do
+    before do
+      allow(Gitlab).to receive(:dev_or_test_env?).and_return(false)
+    end
+
+    context 'for single database' do
+      before do
+        skip_if_multiple_databases_are_setup
+      end
+
+      it { expect { check_forced_decomposition }.not_to raise_error }
+    end
+
+    context 'for multiple database' do
+      before do
+        skip_if_multiple_databases_not_setup
+      end
+
+      let(:main_database_config) do
+        Rails.application.config.load_database_yaml
+          .dig('test', 'main')
+          .slice('adapter', 'encoding', 'database', 'username', 'password', 'host')
+          .symbolize_keys
+      end
+
+      let(:additional_database_config) do
+        # Use built-in postgres database
+        main_database_config.merge(database: 'postgres')
+      end
+
+      around do |example|
+        with_reestablished_active_record_base(reconnect: true) do
+          with_db_configs(test: test_config) do
+            example.run
+          end
+        end
+      end
+
+      context 'when ci and main share the same database' do
+        let(:test_config) do
+          {
+            main: main_database_config,
+            ci: additional_database_config.merge(database: main_database_config[:database])
+          }
+        end
+
+        it { expect { check_forced_decomposition }.not_to raise_error }
+
+        context 'when host is not present' do
+          let(:test_config) do
+            {
+              main: main_database_config.except(:host),
+              ci: additional_database_config.merge(database: main_database_config[:database]).except(:host)
+            }
+          end
+
+          it { expect { check_forced_decomposition }.not_to raise_error }
+        end
+      end
+
+      context 'when ci and main share the same database but different host' do
+        let(:test_config) do
+          {
+            main: main_database_config,
+            ci: additional_database_config.merge(
+              database: main_database_config[:database],
+              host: 'otherhost.localhost'
+            )
+          }
+        end
+
+        it { expect { check_forced_decomposition }.to raise_error(/Separate CI database is not ready/) }
+      end
+
+      context 'when ci and main are different databases' do
+        let(:test_config) do
+          {
+            main: main_database_config,
+            ci: additional_database_config
+          }
+        end
+
+        it { expect { check_forced_decomposition }.to raise_error(/Separate CI database is not ready/) }
+
+        context 'for GitLab.com' do
+          before do
+            allow(::Gitlab).to receive(:com?).and_return(true)
+          end
+
+          it { expect { check_forced_decomposition }.not_to raise_error }
+        end
+
+        context 'when env var GITLAB_ALLOW_SEPARATE_CI_DATABASE is true' do
+          before do
+            stub_env('GITLAB_ALLOW_SEPARATE_CI_DATABASE', 'true')
+          end
+
+          it { expect { check_forced_decomposition }.not_to raise_error }
+        end
+
+        context 'when env var GITLAB_ALLOW_SEPARATE_CI_DATABASE is false' do
+          before do
+            stub_env('GITLAB_ALLOW_SEPARATE_CI_DATABASE', 'false')
+          end
+
+          it { expect { check_forced_decomposition }.to raise_error(/Separate CI database is not ready/) }
+        end
+      end
+    end
+  end
+end