[MBL-1690] Crash When Selecting 'Edit Reward' Option In Manage Pledge…

… Flow (#2145)

* add a test for when the 'update pledge' option is not an option when the feature flag is enabled

* scroll to index path should be based on rewards filtered by location

Library/ViewModels/ManagePledgeViewModelTests.swift

@@ -304,6 +304,42 @@ internal final class ManagePledgeViewModelTests: TestCase {
     }
   }
 
+  func testMenuButtonTapped_WhenProject_IsLive_NoShippingAtCheckout_doesNotInclude_updatePledge() {
+    let project = Project.template
+      |> Project.lens.state .~ .live
+
+    let mockService = MockService(
+      fetchManagePledgeViewBackingResult: .success(.template),
+      fetchProjectResult: .success(project),
+      fetchProjectRewardsResult: .success([.template])
+    )
+
+    let mockConfigClient = MockRemoteConfigClient()
+    mockConfigClient.features = [
+      RemoteConfigFeature.noShippingAtCheckout.rawValue: true
+    ]
+
+    withEnvironment(apiService: mockService, remoteConfigClient: mockConfigClient) {
+      self.vm.inputs.configureWith((Param.slug("project-slug"), Param.id(1)))
+      self.vm.inputs.viewDidLoad()
+
+      self.scheduler.advance()
+
+      self.showActionSheetMenuWithOptions.assertDidNotEmitValue()
+
+      self.vm.inputs.menuButtonTapped()
+
+      self.showActionSheetMenuWithOptions.assertValues([
+        [
+          ManagePledgeAlertAction.changePaymentMethod,
+          ManagePledgeAlertAction.chooseAnotherReward,
+          ManagePledgeAlertAction.contactCreator,
+          ManagePledgeAlertAction.cancelPledge
+        ]
+      ])
+    }
+  }
+
   func testMenuButtonTapped_WhenProject_IsSuccessful_CreatorContext() {
     let user = User.template
     let project = Project.template

Library/ViewModels/WithShippingRewardsCollectionViewModel.swift

@@ -66,9 +66,14 @@ public final class WithShippingRewardsCollectionViewModel: WithShippingRewardsCo
       .map(first)
       .map(titleForContext)
 
-    self.scrollToBackedRewardIndexPath = Signal.combineLatest(project, rewards)
+    self.scrollToBackedRewardIndexPath = Signal.combineLatest(project, rewards, filteredByLocationRewards)
       .takeWhen(self.viewDidLayoutSubviewsProperty.signal.ignoreValues())
-      .map(backedReward(_:rewards:))
+      .map { project, rewards, filteredRewardsByLocation in
+        backedReward(
+          project,
+          rewards: filteredRewardsByLocation.isEmpty ? rewards : filteredRewardsByLocation
+        )
+      }
       .skipNil()
       .take(first: 1)