Scenario conditions in dialogs: option if= hides choices, when moved here from stat checks; command schemas

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/OptionConditionTests.cs

@@ -0,0 +1,59 @@
+namespace Cthangover.Mods.Dialog.Tests
+{
+    using System.Linq;
+    using System.Threading.Tasks;
+    using Cthangover.Core.Mods.Testing;
+    using Cthangover.Mods.Dialog.Action.Impls;
+    using Cthangover.Mods.Dialog.Scenarios;
+
+    /// <summary>
+    /// <c>option … if=…</c>: an option is offered only while its condition holds; a choice whose
+    /// options are all hidden is skipped, so the dialog never waits for an answer nobody can give.
+    /// </summary>
+    public class OptionConditionTests
+    {
+        [ModTest("options/parser_keeps_the_condition")]
+        static void ParserKeepsTheCondition(ModTestContext ctx)
+        {
+            var dlg = ScenarioParser.Parse("select \"?\"\noption \"A\" -> :a\noption \"B\" \"if=door == 'open' && !false\" -> :b\n:a\nend\n:b\nend\n");
+            var select = dlg.Queue.OfType<ActionSelect>().Single();
+            ModAssert.Null(select.Variants[0].Condition, "a plain option has no condition");
+            ModAssert.Equal("door == 'open' && !false", select.Variants[1].Condition, "the quoted pair keeps spaces");
+            ModAssert.Equal("b", select.Variants[1].GoTo, "the jump target stays");
+        }
+
+        [ModTest("options/hidden_options_are_not_offered", TimeoutSeconds = 10)]
+        static async Task HiddenOptionsAreNotOffered(ModTestContext ctx)
+        {
+            var stage = await DialogStage.Create();
+            try
+            {
+                var dlg = ScenarioParser.Parse("select \"?\"\noption \"A\" if=false -> :a\noption \"B\" if=true -> :b\noption \"C\" -> :c\n:a\nend\n:b\nend\n:c\nend\n");
+                ModAssert.True(stage.Box.SetDialogQueueAndRun(dlg, null, 0, null), "dialog starts");
+                ModAssert.True(stage.Box.IsWaitingAnswer, "waits for an answer");
+                ModAssert.Equal(2, stage.Box.AnswerVariantCount, "the false option is hidden");
+            }
+            finally
+            {
+                stage.Free();
+            }
+        }
+
+        [ModTest("options/all_hidden_skips_the_choice", TimeoutSeconds = 10)]
+        static async Task AllHiddenSkipsTheChoice(ModTestContext ctx)
+        {
+            var stage = await DialogStage.Create();
+            try
+            {
+                var dlg = ScenarioParser.Parse("select \"?\"\noption \"A\" if=false -> :a\n\nset outcome skipped\nend\n:a\nset outcome a\nend\n");
+                stage.Box.SetDialogQueueAndRun(dlg, null, 0, null);
+                ModAssert.False(stage.Box.IsWaitingAnswer, "no answer is awaited");
+                ModAssert.Equal("skipped", stage.Box.Runtime.GetVariable("outcome"), "the dialog went on past the choice");
+            }
+            finally
+            {
+                stage.Free();
+            }
+        }
+    }
+}