more deinit tests

Author: chloe-yeo

Tests/FoundationEssentialsTests/ProgressManager/ProgressManagerTests.swift

@@ -352,7 +352,7 @@ extension Tag {
         manager.complete(count: 2)
     }
 
-    @Test func finishedChild() async throws {
+    @Test func finishedChildUnreadBeforeDeinit() async throws {
         let manager = ProgressManager(totalCount: 2)
 
         manager.complete(count: 1)
@@ -362,6 +362,20 @@ extension Tag {
         #expect(manager.fractionCompleted == 1.0)
     }
 
+    @Test func finishedChildReadBeforeDeinit() async throws {
+        let manager = ProgressManager(totalCount: 2)
+        
+        manager.complete(count: 1)
+        #expect(manager.fractionCompleted == 0.5)
+
+        var child: ProgressManager? = manager.subprogress(assigningCount: 1).start(totalCount: 1)
+        child?.complete(count: 1)
+        #expect(manager.fractionCompleted == 1.0)
+        
+        child = nil
+        #expect(manager.fractionCompleted == 1.0)
+    }
+    
     @Test func uninitializedSubprogress() async throws {
         let manager = ProgressManager(totalCount: 2)