1 files changed, 71 insertions, 0 deletions
diff --git a/spec/services/database/mark_migration_service_spec.rb b/spec/services/database/mark_migration_service_spec.rb
new file mode 100644
index 00000000000..5fd2268484e
--- /dev/null
+++ b/spec/services/database/mark_migration_service_spec.rb
@@ -0,0 +1,71 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Database::MarkMigrationService, feature_category: :database do
+  let(:service) { described_class.new(connection: connection, version: version) }
+  let(:version) { 1 }
+  let(:connection) { ApplicationRecord.connection }
+
+  let(:migrations) do
+    [
+      instance_double(
+        ActiveRecord::MigrationProxy,
+        version: 1,
+        name: 'migration_pending',
+        filename: 'db/migrate/1_migration_pending.rb'
+      )
+    ]
+  end
+
+  before do
+    ctx = instance_double(ActiveRecord::MigrationContext, migrations: migrations)
+    allow(connection).to receive(:migration_context).and_return(ctx)
+  end
+
+  describe '#execute' do
+    subject(:execute) { service.execute }
+
+    it 'marks the migration as successful' do
+      expect { execute }
+        .to change { ActiveRecord::SchemaMigration.where(version: version).count }
+        .by(1)
+
+      is_expected.to be_success
+    end
+
+    context 'when the migration does not exist' do
+      let(:version) { 123 }
+
+      it { is_expected.to be_error }
+      it { expect(execute.reason).to eq(:not_found) }
+
+      it 'does not insert records' do
+        expect { execute }
+          .not_to change { ActiveRecord::SchemaMigration.where(version: version).count }
+      end
+    end
+
+    context 'when the migration was already executed' do
+      before do
+        allow(service).to receive(:all_versions).and_return([version])
+      end
+
+      it { is_expected.to be_error }
+      it { expect(execute.reason).to eq(:invalid) }
+
+      it 'does not insert records' do
+        expect { execute }
+          .not_to change { ActiveRecord::SchemaMigration.where(version: version).count }
+      end
+    end
+
+    context 'when the insert fails' do
+      it 'returns an error response' do
+        expect(service).to receive(:create_version).with(version).and_return(false)
+
+        is_expected.to be_error
+      end
+    end
+  end
+end