Merge pull request #328 from DFE-Digital/feature/default-sponsored-gr…

…ant-amounts

Nullify reason if amount changed is false

Dfe.Academies.Academisation.Domain/ProjectAggregate/Project.cs

@@ -199,7 +199,7 @@ public CommandResult Update(ProjectDetails detailsToUpdate)
 			ProposedAcademyOpeningDate = detailsToUpdate.ProposedAcademyOpeningDate,
 			SchoolAndTrustInformationSectionComplete = detailsToUpdate.SchoolAndTrustInformationSectionComplete,
 			ConversionSupportGrantAmount = CalculateDefaultSponsoredGrant(Details.ConversionSupportGrantType, detailsToUpdate.ConversionSupportGrantType, detailsToUpdate.ConversionSupportGrantAmount),
-			ConversionSupportGrantChangeReason = detailsToUpdate.ConversionSupportGrantChangeReason,
+			ConversionSupportGrantChangeReason = NullifyGrantChangeReasonIfNeeded(detailsToUpdate.ConversionSupportGrantAmountChanged, detailsToUpdate.ConversionSupportGrantChangeReason),
 			ConversionSupportGrantType = detailsToUpdate.ConversionSupportGrantType,
 			ConversionSupportGrantEnvironmentalImprovementGrant = detailsToUpdate.ConversionSupportGrantEnvironmentalImprovementGrant,
 			ConversionSupportGrantAmountChanged = detailsToUpdate.ConversionSupportGrantAmountChanged,
@@ -348,4 +348,12 @@ public CommandResult Update(ProjectDetails detailsToUpdate)
 			_ => currentAmount
 		};
 	}
+	protected string? NullifyGrantChangeReasonIfNeeded(bool? grantAmountChanged, string? reason)
+	{
+		return grantAmountChanged switch
+		{
+			true => reason,
+			false => null
+		};
+	}
 }