From 073a0201895ab9af996c1b30790fbe3c2ccaa5d0 Mon Sep 17 00:00:00 2001
From: James King <james.king@facepunchstudios.com>
Date: Fri, 21 Jun 2024 10:17:48 +0100
Subject: [PATCH] Failing test for watching a SubFileSystem involving case
 sensitivity

Watcher events get silently discarded if all conditions are met:
* SubFileSystem was created with incorrect case
* Changed file path includes a ~
* Any segment of changed file path is short enough to possibly be a SFN
---
 .../FileSystems/TestSubFileSystem.cs          | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/src/Zio.Tests/FileSystems/TestSubFileSystem.cs b/src/Zio.Tests/FileSystems/TestSubFileSystem.cs
index 620789f..d43decf 100644
--- a/src/Zio.Tests/FileSystems/TestSubFileSystem.cs
+++ b/src/Zio.Tests/FileSystems/TestSubFileSystem.cs
@@ -74,6 +74,43 @@ public void TestWatcher()
         Assert.True(gotChange);
     }
 
+    [SkippableTheory]
+    [InlineData("/test", "/test", "/foo.txt")]
+    [InlineData("/test", "/test", "/~foo.txt")]
+    [InlineData("/test", "/TEST", "/foo.txt")]
+    [InlineData("/test", "/TEST", "/~foo.txt")]
+    [InlineData("/verylongname", "/VERYLONGNAME", "/foo.txt")]
+    [InlineData("/verylongname", "/VERYLONGNAME", "/~foo.txt")]
+    public void TestWatcherCaseSensitive(string physicalDir, string subDir, string filePath)
+    {
+        Skip.IfNot(IsWindows, "This test involves case insensitivity on Windows");
+
+        var physicalFs = GetCommonPhysicalFileSystem();
+        physicalFs.CreateDirectory(physicalDir);
+
+        Assert.True(physicalFs.DirectoryExists(physicalDir));
+        Assert.True(physicalFs.DirectoryExists(subDir));
+
+        var subFs = new SubFileSystem(physicalFs, subDir);
+        var watcher = subFs.Watch("/");
+
+        var gotChange = false;
+        watcher.Created += (sender, args) =>
+        {
+            if (args.FullPath == filePath)
+            {
+                gotChange = true;
+            }
+        };
+
+        watcher.IncludeSubdirectories = true;
+        watcher.EnableRaisingEvents = true;
+
+        physicalFs.WriteAllText($"{physicalDir}{filePath}", "test");
+        Thread.Sleep(100);
+        Assert.True(gotChange);
+    }
+
     [SkippableFact]
     public void TestDirectorySymlink()
     {