Fix smoke 1차 follow-up gaps: player resolver, type target, filter, utf8 (#12)

tests/Recordingtest.Recorder.Tests/RecorderTests.cs

@@ -299,6 +299,138 @@ public class RecorderTests
         Assert.Equal(0x43u, steps[0].RawVk);
     }
 
+    [Fact]
+    public void DragCollapser_TypeAfterFocusChange_InheritsTarget()
+    {
+        // focus_change → key_down B,O,X (no resolver result for keys).
+        UiaResolution? Resolver(RawEvent ev) => null;
+        const string focusPath = "MetroWindow[@AutomationId='root']/CommandPanel/TextBox[@AutomationId='CommandBox']/TextBox[@AutomationId='CB']";
+        var events = new[]
+        {
+            new RawEvent(100, "focus_change", 0, 0, 0, 0, focusPath),
+            new RawEvent(110, "key_down", 0, 0, 0x42, 0), // B
+            new RawEvent(120, "key_down", 0, 0, 0x4F, 0), // O
+            new RawEvent(130, "key_down", 0, 0, 0x58, 0), // X
+        };
+
+        var steps = new DragCollapser().Collapse(events, Resolver);
+
+        // focus + type
+        Assert.Equal(2, steps.Count);
+        Assert.Equal("type", steps[1].Kind);
+        Assert.Equal("BOX", steps[1].Value);
+        Assert.NotNull(steps[1].Target);
+        Assert.Equal(focusPath, steps[1].Target!.UiaPath);
+    }
+
+    [Fact]
+    public void DragCollapser_TypeAfterMouseDown_FallbackToMouseTarget()
+    {
+        var el = MakeRectElement("Canvas", 0, 0, 800, 600);
+        const string mousePath = "Window[@Name='Canvas']";
+        UiaResolution? Resolver(RawEvent ev) =>
+            ev.Kind == "key_down" || ev.Kind == "key_up"
+                ? null
+                : new UiaResolution(el, mousePath);
+
+        var events = new[]
+        {
+            new RawEvent(100, "mouse_down_l", 100, 100, 0, 0),
+            new RawEvent(105, "mouse_up_l", 101, 101, 0, 0),
+            new RawEvent(110, "key_down", 0, 0, 0x31, 0), // 1
+            new RawEvent(120, "key_down", 0, 0, 0x30, 0), // 0
+        };
+
+        var steps = new DragCollapser().Collapse(events, Resolver);
+
+        Assert.Equal(2, steps.Count);
+        Assert.Equal("click", steps[0].Kind);
+        Assert.Equal("type", steps[1].Kind);
+        Assert.Equal("10", steps[1].Value);
+        Assert.NotNull(steps[1].Target);
+        Assert.Equal(mousePath, steps[1].Target!.UiaPath);
+    }
+
+    [Fact]
+    public void WindowFilter_ExternalCoord_DropsEvent()
+    {
+        // SUT pid is 42. Mouse event at (10,10) belongs to pid 99 → drop.
+        var filter = new SutProcessWindowFilter(
+            sutPid: 42,
+            processFromPoint: (_, _) => 99,
+            processFromForeground: () => 99);
+
+        var ev = new RawEvent(0, "mouse_down_l", 10, 10, 0, 0);
+        Assert.False(filter.ShouldKeep(ev));
+
+        var key = new RawEvent(0, "key_down", 0, 0, 0x42, 0);
+        Assert.False(filter.ShouldKeep(key));
+    }
+
+    [Fact]
+    public void WindowFilter_SutCoord_KeepsEvent()
+    {
+        var filter = new SutProcessWindowFilter(
+            sutPid: 42,
+            processFromPoint: (_, _) => 42,
+            processFromForeground: () => 42);
+
+        Assert.True(filter.ShouldKeep(new RawEvent(0, "mouse_down_l", 10, 10, 0, 0)));
+        Assert.True(filter.ShouldKeep(new RawEvent(0, "key_down", 0, 0, 0x42, 0)));
+        // Unknown pid (0) is permissively kept to avoid false drops.
+        var permissive = new SutProcessWindowFilter(
+            sutPid: 42,
+            processFromPoint: (_, _) => 0,
+            processFromForeground: () => 0);
+        Assert.True(permissive.ShouldKeep(new RawEvent(0, "mouse_down_l", 1, 1, 0, 0)));
+    }
+
+    [Fact]
+    public void ScenarioWriter_RoundTrip_PreservesKorean()
+    {
+        var s = new Scenario
+        {
+            Name = "한글-시나리오",
+            Description = "회귀 테스트 — 새 파일",
+            Steps =
+            {
+                new ScenarioStep
+                {
+                    Kind = "click",
+                    Target = new ScenarioTarget
+                    {
+                        UiaPath = "MetroWindow[@AutomationId='root']/Button[@Name='새 파일']",
+                        Offset = new[] { 0.5, 0.5 },
+                    },
+                },
+            },
+        };
+
+        var tmp = Path.Combine(Path.GetTempPath(), $"recordingtest-utf8-{System.Guid.NewGuid():N}.yaml");
+        try
+        {
+            ScenarioWriter.WriteToFile(s, tmp);
+
+            // No BOM at byte 0.
+            var bytes = File.ReadAllBytes(tmp);
+            Assert.True(bytes.Length >= 3);
+            Assert.False(bytes[0] == 0xEF && bytes[1] == 0xBB && bytes[2] == 0xBF,
+                "ScenarioWriter must emit UTF-8 without BOM");
+
+            var text = File.ReadAllText(tmp, System.Text.Encoding.UTF8);
+            var parsed = ScenarioWriter.Deserialize(text);
+
+            Assert.Equal(s.Name, parsed.Name);
+            Assert.Equal(s.Description, parsed.Description);
+            Assert.Equal("MetroWindow[@AutomationId='root']/Button[@Name='새 파일']",
+                parsed.Steps[0].Target!.UiaPath);
+        }
+        finally
+        {
+            if (File.Exists(tmp)) File.Delete(tmp);
+        }
+    }
+
     [Fact]
     public void Cli_MissingAttach_ExitTwo()
     {