From d6b9b7355cced7a39aa9e9d0a4f62f62b0d84e2d Mon Sep 17 00:00:00 2001
From: Weihan Li <weihanli@outlook.com>
Date: Thu, 30 Nov 2023 23:01:45 +0800
Subject: [PATCH] sample: add DisposeTestSample

---
 samples/DotNetCoreSample/DisposeTest.cs | 104 ++++++++++++++++++++++++
 samples/DotNetCoreSample/Program.cs     |  19 ++++-
 2 files changed, 120 insertions(+), 3 deletions(-)
 create mode 100644 samples/DotNetCoreSample/DisposeTest.cs

diff --git a/samples/DotNetCoreSample/DisposeTest.cs b/samples/DotNetCoreSample/DisposeTest.cs
new file mode 100644
index 00000000..0340a652
--- /dev/null
+++ b/samples/DotNetCoreSample/DisposeTest.cs
@@ -0,0 +1,104 @@
+// Copyright (c) Weihan Li. All rights reserved.
+// Licensed under the Apache license.
+
+using WeihanLi.Common.Helpers;
+
+namespace DotNetCoreSample;
+
+public class DisposeTest
+{
+    public static void MainTest()
+    {
+        Console.WriteLine(@$"---- {nameof(MainTest)} start");
+        {
+            using var service = new TestService()
+            {
+                Name = "MainTest"
+            };
+        }
+        {
+            var service = new TestService()
+            {
+                Name = "MainTest1"
+            };
+            service.Dispose();
+        }
+        {
+            // forget to dispose
+            var service = new TestService()
+            {
+                Name = "MainTest2"
+            };
+            Console.WriteLine(service.GetType());
+            
+            service = null;
+            Console.WriteLine(service is null);
+        }
+        GC.Collect();
+        GC.WaitForPendingFinalizers();
+
+        Console.WriteLine(@$"---- {nameof(MainTest)} end");
+    }
+    
+    public static async ValueTask MainTestAsync()
+    {
+        Console.WriteLine(@$"---- {nameof(MainTestAsync)} start");
+        {
+            await using var service = new TestService()
+            {
+                Name = "MainTestAsync"
+            };
+        }
+        {
+            var service = new TestService()
+            {
+                Name = "MainTestAsync1"
+            };
+            await service.DisposeAsync();
+        }
+        {
+            // forget to dispose
+            var service = new TestService()
+            {
+                Name = "MainTestAsync2"
+            };
+            Console.WriteLine(service.GetType());
+            
+            service = null;
+            Console.WriteLine(service is null);
+        }
+        GC.Collect();
+        GC.WaitForPendingFinalizers();
+
+        Console.WriteLine(@$"---- {nameof(MainTestAsync)} end");
+    }
+}
+
+file sealed class TestService : DisposableBase
+{
+    public required string Name { get; init; }
+    
+    protected override void Dispose(bool disposing)
+    {
+        if (disposing)
+        {
+            Console.WriteLine($@"<<{Name}>> disposes managed resources");    
+        }
+        Console.WriteLine($@"<<{Name}>> disposes unmanaged resources");
+        base.Dispose(disposing);
+    }
+
+    protected override async ValueTask DisposeAsyncCore()
+    {
+        {
+            Console.WriteLine($@"<<{Name}>> disposes managed resources async");
+            await Task.Yield();
+        }
+        await base.DisposeAsyncCore();
+    }
+
+    ~TestService()
+    {
+        Console.WriteLine($@"<<{Name}>> Finalizer executing");
+    }
+}
diff --git a/samples/DotNetCoreSample/Program.cs b/samples/DotNetCoreSample/Program.cs
index ad98dded..006cff1c 100644
--- a/samples/DotNetCoreSample/Program.cs
+++ b/samples/DotNetCoreSample/Program.cs
@@ -320,11 +320,24 @@
 //     Console.WriteLine(@"Exited");
 // });
 // ApplicationHelper.RuntimeInfo.Dump();
-Console.WriteLine(ApplicationHelper.ResolvePath("yarn.cmd"));
-await AppHostTest.MainTest();
+// Console.WriteLine(ApplicationHelper.ResolvePath("yarn.cmd"));
+// await AppHostTest.MainTest();
 // NewtonJsonFormatterTest.MainTest();
 
-// ConsoleHelper.ReadKeyWithPrompt("Press any key to exit");
+DisposeTest.MainTest();
+Console.WriteLine();
+await DisposeTest.MainTestAsync();
+Console.WriteLine();
+
+ConsoleHelper.ReadKeyWithPrompt("Press any key to continue");
+
+await DisposeTest.MainTestAsync();
+Console.WriteLine();
+
+GC.Collect();
+GC.WaitForPendingFinalizers();
+
+ConsoleHelper.ReadKeyWithPrompt("Press any key to exit");
 
 internal struct TestStruct
 {