Fix #1501: Generate WhenStateIs/WillSetStateTo correctly in ToCSharpCode

src/WireMock.Net.Minimal/Serialization/MappingConverter.cs

@@ -167,9 +167,15 @@ public string ToCSharpCode(IMapping mapping, MappingConverterSettings? settings
         {
             sb.AppendLine($"    .InScenario({ToCSharpStringLiteral(mapping.Scenario)})");
         }
+        if (!string.IsNullOrEmpty(mapping.ExecutionConditionState))
+        {
+            sb.AppendLine($"    .WhenStateIs({ToCSharpStringLiteral(mapping.ExecutionConditionState)})");
+        }
         if (!string.IsNullOrEmpty(mapping.NextState))
         {
-            sb.AppendLine($"    .WhenStateIs({ToCSharpStringLiteral(mapping.NextState)}, {ToCSharpIntLiteral(mapping.TimesInSameState)})");
+            sb.AppendLine(mapping.TimesInSameState > 1
+                ? $"    .WillSetStateTo({ToCSharpStringLiteral(mapping.NextState)}, {ToCSharpIntLiteral(mapping.TimesInSameState)})"
+                : $"    .WillSetStateTo({ToCSharpStringLiteral(mapping.NextState)})");
         }
 
         if (mapping.Probability != null)

test/WireMock.Net.Tests/MappingBuilderTests.ToCSharpCode_Builder.verified.txt

@@ -73,7 +73,7 @@ builder
     )
     .WithGuid("98fae52e-76df-47d9-876f-2ee32e931005")
     .InScenario("To do list")
-    .WhenStateIs("TodoList State Started", 2)
+    .WillSetStateTo("TodoList State Started", 2)
     .RespondWith(Response.Create()
         .WithBody("Buy milk")
     );

test/WireMock.Net.Tests/MappingBuilderTests.ToCSharpCode_Server.verified.txt

@@ -73,7 +73,7 @@ server
     )
     .WithGuid("98fae52e-76df-47d9-876f-2ee32e931005")
     .InScenario("To do list")
-    .WhenStateIs("TodoList State Started", 2)
+    .WillSetStateTo("TodoList State Started", 2)
     .RespondWith(Response.Create()
         .WithBody("Buy milk")
     );

test/WireMock.Net.Tests/Serialization/MappingConverterTests.ToCSharpCode.cs

@@ -97,6 +97,67 @@ public Task ToCSharpCode_With_Server_And_AddStartIsFalse()
         return Verify(code, VerifySettings);
     }
 
+    [Fact]
+    public Task ToCSharpCode_With_ScenarioAndState_Emits_WhenStateIs_And_WillSetStateTo()
+    {
+        // Assign: a stateful mapping that gates on state "Begin" and moves to "End" after 3 hits.
+        var mapping = CreateScenarioMapping("Ordering", executionConditionState: "Begin", nextState: "End", timesInSameState: 3);
+
+        // Act
+        var code = _sut.ToCSharpCode(mapping, new MappingConverterSettings
+        {
+            AddStart = false,
+            ConverterType = MappingConverterType.Server
+        });
+
+        // Verify
+        return Verify(code, VerifySettings);
+    }
+
+    [Fact]
+    public Task ToCSharpCode_With_NextStateOnly_Emits_WillSetStateTo_Without_Times()
+    {
+        // Assign: a start-state mapping that only sets the next state (no execution condition, default times).
+        var mapping = CreateScenarioMapping("Ordering", executionConditionState: null, nextState: "Begin", timesInSameState: null);
+
+        // Act
+        var code = _sut.ToCSharpCode(mapping, new MappingConverterSettings
+        {
+            AddStart = false,
+            ConverterType = MappingConverterType.Server
+        });
+
+        // Verify
+        return Verify(code, VerifySettings);
+    }
+
+    private Mapping CreateScenarioMapping(string scenario, string? executionConditionState, string? nextState, int? timesInSameState)
+    {
+        var request = Request.Create().UsingGet().WithPath("/test_path");
+        var response = Response.Create().WithSuccess();
+
+        return new Mapping
+        (
+            new Guid("8e7b9ab7-e18e-4502-8bc9-11e6679811cc"),
+            _updatedAt,
+            string.Empty,
+            string.Empty,
+            null,
+            _settings,
+            request,
+            response,
+            0,
+            scenario,
+            executionConditionState,
+            nextState,
+            timesInSameState,
+            null,
+            false,
+            null,
+            data: null
+        );
+    }
+
     private IMapping CreateMapping()
     {
         var guid = new Guid("8e7b9ab7-e18e-4502-8bc9-11e6679811cc");

test/WireMock.Net.Tests/Serialization/MappingConverterTests.ToCSharpCode_With_NextStateOnly_Emits_WillSetStateTo_Without_Times.verified.txt

@@ -0,0 +1,11 @@
+server
+    .Given(Request.Create()
+        .UsingMethod("GET")
+        .WithPath(new WildcardMatcher(WireMock.Matchers.MatchBehaviour.AcceptOnMatch, "/test_path", false, WireMock.Matchers.MatchOperator.Or))
+    )
+    .WithGuid("8e7b9ab7-e18e-4502-8bc9-11e6679811cc")
+    .InScenario("Ordering")
+    .WillSetStateTo("Begin")
+    .RespondWith(Response.Create()
+        .WithStatusCode(200)
+    );

test/WireMock.Net.Tests/Serialization/MappingConverterTests.ToCSharpCode_With_ScenarioAndState_Emits_WhenStateIs_And_WillSetStateTo.verified.txt

@@ -0,0 +1,12 @@
+server
+    .Given(Request.Create()
+        .UsingMethod("GET")
+        .WithPath(new WildcardMatcher(WireMock.Matchers.MatchBehaviour.AcceptOnMatch, "/test_path", false, WireMock.Matchers.MatchOperator.Or))
+    )
+    .WithGuid("8e7b9ab7-e18e-4502-8bc9-11e6679811cc")
+    .InScenario("Ordering")
+    .WhenStateIs("Begin")
+    .WillSetStateTo("End", 3)
+    .RespondWith(Response.Create()
+        .WithStatusCode(200)
+    );