Add missing expectation

This example would "pass" regardless of whether we used an quality check
or unequality check. We need to `expect` here.

Co-authored-by: Noah Silvera <[email protected]>

Author: benjaminwil

core/spec/models/spree/stock/simple_coordinator_spec.rb

@@ -39,7 +39,7 @@ module Stock
         end
 
         it "builds a shipment for all active stock locations" do
-          subject.shipments.count == StockLocation.count
+          expect(subject.shipments.count).to eq StockLocation.count
         end
 
         it 'uses the pluggable inventory unit builder class' do