1 files changed, 16 insertions, 0 deletions
diff --git a/spec/models/spree/shipment_spec.rb b/spec/models/spree/shipment_spec.rb
new file mode 100644
index 0000000..27f213b
--- /dev/null
+++ b/spec/models/spree/shipment_spec.rb
@@ -0,0 +1,16 @@
+RSpec.describe Spree::Shipment do
+  describe '#update' do
+    subject { shipment.ship }
+
+    let(:shipment) { create(:shipment, state: 'ready', order: order) }
+    let(:order) { create :order_with_line_items }
+
+    it 'fires the shipment_shipped event exactly once' do
+      stub_const('Spree::Event', class_spy(Spree::Event))
+
+      expect(Spree::Event).to receive(:fire).with('shipment_shipped', shipment: shipment).once
+
+      subject
+    end
+  end
+end