feat: working on tests for pressure estimation feature to resolve filter drop bugs

Sources/PressureEstimationsFeature/FlaggedMeasurementsList.swift

@@ -17,7 +17,7 @@ public struct FlaggedMeasurementsList: Sendable {
   
   @ObservableState
   @dynamicMemberLookup
-  public struct State: Equatable {
+  public struct State: Equatable, Sendable {
     
     @Presents public var destination: Destination.State?
     @Shared var sharedSettings: SharedPressureEstimationState
@@ -130,16 +130,38 @@ public struct FlaggedMeasurementsList: Sendable {
               )
             }
             state.destination = nil
-            return handleEstimationForm(form: form, state: state)
+            return .run { [state] send in
+              do {
+                guard let flaggedEstimation = try await self._handleEstimationForm(form: form, state: state)
+                else { return }
+                await send(.receive(.success(.estimatedFlaggedMeasurement(flaggedEstimation))))
+              } catch {
+                await send(.receive(.failure(error)))
+              }
+            }
+            
           }
           
         case .editButtonTapped(id: _):
           return .none
           
         case .onAppear:
-          guard let equipmentMeasurement = state.sharedSettings.equipmentMeasurement else {
-            return .none
+          guard state.sharedSettings.flaggedEquipmentMeasurement == nil 
+          else { return .none }
+          
+          guard let equipmentMeasurement = state.sharedSettings.equipmentMeasurement 
+          else {
+            return .fail(
+              """
+                Equipment measurement is not set, skipping generating flagged measurement for existing
+                equipment.
+                
+                This is considered an application logic error.
+                """,
+              logger: logger
+            )
           }
+          
           if state.sharedSettings.budgets == nil {
             state.sharedSettings.budgets = .init(
               equipmentType: state.sharedSettings.equipmentMeasurement!.equipmentType,
@@ -159,6 +181,42 @@ public struct FlaggedMeasurementsList: Sendable {
     .ifLet(\.$destination, action: \.destination)
   }
   
+  enum EstimationFormFailure: Error {
+    case invalidState
+  }
+  
+  func _handleEstimationForm(form: EstimationForm.State, state: State) async throws -> SharedPressureEstimationState.FlaggedEstimationContainer? {
+     guard let equipmentMeasurement = state.sharedSettings.equipmentMeasurement,
+          let budgets = state.sharedSettings.budgets
+    else {
+       throw EstimationFormFailure.invalidState
+     }
+    
+    guard let estimationState = ensureHasChanges(
+      formState: form,
+      flaggedEstimations: state.sharedSettings.flaggedEstimations
+    ) else {
+      logger.debug("No changes found, not generating a new flagged estimation measurement.")
+      return nil
+    }
+    
+    let flaggedMeasurement = try await flaggedMeasurement(
+      airflow: estimationState.cfm.airflow,
+      budgets: budgets,
+      equipmentMeasurement: equipmentMeasurement,
+      filterPressureDrop: parseFilterPressureDrop(formState: form, sharedSettings: state.sharedSettings),
+      ratedStaticPresures: state.sharedSettings.ratedStaticPressures,
+      tons: form.coolingCapacity
+    )
+    
+    return SharedPressureEstimationState.FlaggedEstimationContainer(
+      id: form.id ?? uuid(),
+      estimationState: estimationState,
+      flaggedMeasurement: flaggedMeasurement
+    )
+  }
+  
+  #warning("This is making it hard to test, perhaps don't return an effect here.")
   private func handleEstimationForm(form: EstimationForm.State, state: State) -> Effect<Action> {
     guard let equipmentMeasurement = state.sharedSettings.equipmentMeasurement,
           let budgets = state.sharedSettings.budgets
@@ -179,7 +237,6 @@ public struct FlaggedMeasurementsList: Sendable {
       flaggedEstimations: state.sharedSettings.flaggedEstimations
     ) else {
       logger.debug("No changes found, not generating a new flagged estimation measurement.")
-      print("No changes found, not generating a new flagged estimation measurement.")
       return .none
     }