From 8a6d14bd88680cd377ce0a576a3821bd5f8420f9 Mon Sep 17 00:00:00 2001
From: Casey Waldren <cwaldren@launchdarkly.com>
Date: Fri, 25 Oct 2024 12:34:09 -0700
Subject: [PATCH] add FeatureFlagBuilder.Prerequisites helper

---
 pkgs/sdk/client/src/DataModel.cs                 |  2 +-
 .../ModelBuilders.cs                             | 16 +++++++++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/pkgs/sdk/client/src/DataModel.cs b/pkgs/sdk/client/src/DataModel.cs
index 923e0169..30eda5f3 100644
--- a/pkgs/sdk/client/src/DataModel.cs
+++ b/pkgs/sdk/client/src/DataModel.cs
@@ -59,7 +59,7 @@ internal FeatureFlag(
                 TrackEvents = trackEvents;
                 TrackReason = trackReason;
                 DebugEventsUntilDate = debugEventsUntilDate;
-                Prerequisites = prerequisites;
+                Prerequisites = prerequisites != null ? new List<string>(prerequisites) : null;
             }
 
             /// <inheritdoc/>
diff --git a/pkgs/sdk/client/test/LaunchDarkly.ClientSdk.Tests/ModelBuilders.cs b/pkgs/sdk/client/test/LaunchDarkly.ClientSdk.Tests/ModelBuilders.cs
index a32ffb92..3ae085e2 100644
--- a/pkgs/sdk/client/test/LaunchDarkly.ClientSdk.Tests/ModelBuilders.cs
+++ b/pkgs/sdk/client/test/LaunchDarkly.ClientSdk.Tests/ModelBuilders.cs
@@ -16,6 +16,7 @@ internal class FeatureFlagBuilder
         private bool _trackReason;
         private UnixMillisecondTime? _debugEventsUntilDate;
         private EvaluationReason? _reason;
+        private List<string> _prerequisites;
 
         public FeatureFlagBuilder()
         {
@@ -30,11 +31,12 @@ public FeatureFlagBuilder(FeatureFlag from)
             _trackReason = from.TrackReason;
             _debugEventsUntilDate = from.DebugEventsUntilDate;
             _reason = from.Reason;
+            _prerequisites = from.Prerequisites != null ? new List<string>(from.Prerequisites) : null;
         }
 
         public FeatureFlag Build()
         {
-            return new FeatureFlag(_value, _variation, _reason, _version, _flagVersion, _trackEvents, _trackReason, _debugEventsUntilDate);
+            return new FeatureFlag(_value, _variation, _reason, _version, _flagVersion, _trackEvents, _trackReason, _debugEventsUntilDate, _prerequisites);
         }
 
         public FeatureFlagBuilder Value(LdValue value)
@@ -88,6 +90,18 @@ public FeatureFlagBuilder DebugEventsUntilDate(UnixMillisecondTime? debugEventsU
             _debugEventsUntilDate = debugEventsUntilDate;
             return this;
         }
+
+        public FeatureFlagBuilder Prerequisites(params string[] prerequisites)
+        {
+            if (prerequisites == null || prerequisites.Length == 0)
+            {
+                _prerequisites = null;
+                return this;
+            }
+
+            _prerequisites = new List<string>(prerequisites);
+            return this;
+        }
     }
 
     internal class DataSetBuilder