From 2182f72105033db025bb29e08319586112e53c5f Mon Sep 17 00:00:00 2001
From: Ariver <shanghai3168@gmail.com>
Date: Wed, 10 Jun 2026 19:37:25 +0800
Subject: [PATCH] Fix empty Space lane fill

---
 C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift |   44 ++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 44 insertions(+), 0 deletions(-)

diff --git a/C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift b/C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift
index 298f686..a6c3447 100644
--- a/C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift
+++ b/C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift
@@ -1174,6 +1174,50 @@
         XCTAssertEqual(snapshot.appGroups.single?.windows.map(\.primarySpaceID), [10, 11, 12, 12, nil])
     }
 
+    func testWindowSpaceMappingFillsUnresolvedWindowsFromSpaceInverseMap() {
+        let mapping = WindowSpaceMappingPolicy.mergedSpaceIDsByWindowID(
+            requestedWindowIDs: [10, 20, 30],
+            directSpaceIDsByWindowID: [10: [100]],
+            windowIDsBySpaceID: [
+                100: [10, 20],
+                101: [30]
+            ],
+            orderedSpaceIDs: [100, 101]
+        )
+
+        XCTAssertEqual(mapping[10], [100])
+        XCTAssertEqual(mapping[20], [100])
+        XCTAssertEqual(mapping[30], [101])
+    }
+
+    func testWindowSpaceMappingDoesNotOverwriteDirectSpaceAssignments() {
+        let mapping = WindowSpaceMappingPolicy.mergedSpaceIDsByWindowID(
+            requestedWindowIDs: [10],
+            directSpaceIDsByWindowID: [10: [101]],
+            windowIDsBySpaceID: [
+                100: [10]
+            ],
+            orderedSpaceIDs: [100, 101]
+        )
+
+        XCTAssertEqual(mapping[10], [101])
+    }
+
+    func testWindowSpaceMappingLeavesAmbiguousNoSpaceWindowsUnassigned() {
+        let mapping = WindowSpaceMappingPolicy.mergedSpaceIDsByWindowID(
+            requestedWindowIDs: [10, 20],
+            directSpaceIDsByWindowID: [:],
+            windowIDsBySpaceID: [
+                100: [10, 99]
+            ],
+            orderedSpaceIDs: [100]
+        )
+
+        XCTAssertEqual(mapping[10], [100])
+        XCTAssertNil(mapping[20])
+        XCTAssertNil(mapping[99])
+    }
+
     func testQuickSwitchSnapshotKeepsMinimizedAndFullscreenWindows() {
         let app = makeApp()
         let snapshot = QuickSwitchSnapshotBuilder.snapshot(

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