handle clear order being async in tests

Author: iamgabrielma

WooCommerce/WooCommerceTests/POS/Mocks/MockPointOfSaleOrderController.swift

@@ -33,8 +33,21 @@ final class MockPointOfSaleOrderController: PointOfSaleOrderControllerProtocol {
     }
 
     var clearOrderWasCalled: Bool = false
+    private var clearOrderContinuation: CheckedContinuation<Void, Never>?
+
     func clearOrder() async {
         clearOrderWasCalled = true
+        await withCheckedContinuation { continuation in
+            clearOrderContinuation = continuation
+            // Resume immediately to simulate completion
+            continuation.resume()
+        }
+    }
+
+    func waitForClearOrder() async {
+        while !clearOrderWasCalled {
+            try? await Task.sleep(nanoseconds: 1_000_000)
+        }
     }
 
     var sendReceiptErrorToThrow: Error?

WooCommerce/WooCommerceTests/POS/Models/PointOfSaleAggregateModelTests.swift

@@ -220,6 +220,7 @@ struct PointOfSaleAggregateModelTests {
             sut.startNewCart()
 
             // Then
+            await orderController.waitForClearOrder()
             #expect(orderController.clearOrderWasCalled == true)
         }
 
@@ -329,6 +330,7 @@ struct PointOfSaleAggregateModelTests {
             sut.pointOfSaleClosed()
 
             // Then
+            await orderController.waitForClearOrder()
             #expect(orderController.clearOrderWasCalled == true)
             #expect(cardPresentPaymentService.cancelPaymentCalled == true)
         }