feat: add IFileSystemWatcher.Filters

Directory.Build.props

@@ -14,6 +14,7 @@
     <DefineConstants Condition="'$(TargetFramework)' == 'net5.0' OR '$(TargetFramework)' == 'netcoreapp3.1' OR '$(TargetFramework)' == 'netstandard2.1'">$(DefineConstants);FEATURE_ASYNC_FILE;FEATURE_ENUMERATION_OPTIONS;FEATURE_ADVANCED_PATH_OPERATIONSFEATURE_PATH_JOIN_WITH_SPAN</DefineConstants>
     <DefineConstants Condition="'$(TargetFramework)' == 'net5.0'">$(DefineConstants);FEATURE_FILE_MOVE_WITH_OVERWRITE</DefineConstants>
     <DefineConstants Condition="'$(TargetFramework)' == 'net5.0'">$(DefineConstants);FEATURE_SUPPORTED_OS_ATTRIBUTE</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)' == 'net5.0'">$(DefineConstants);FEATURE_FILE_SYSTEM_WATCHER_FILTERS</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37">

src/System.IO.Abstractions/FileSystemWatcherBase.cs

@@ -15,6 +15,11 @@ public abstract class FileSystemWatcherBase : IFileSystemWatcher
         /// <inheritdoc cref="FileSystemWatcher.Filter"/>
         public abstract string Filter { get; set; }
 
+#if FEATURE_FILE_SYSTEM_WATCHER_FILTERS
+       /// <inheritdoc cref="FileSystemWatcher.Filters"/>
+        public abstract System.Collections.ObjectModel.Collection<string> Filters { get; }
+#endif
+
         /// <inheritdoc cref="FileSystemWatcher.InternalBufferSize"/>
         public abstract int InternalBufferSize { get; set; }
 

src/System.IO.Abstractions/FileSystemWatcherWrapper.cs

@@ -54,6 +54,13 @@ public override string Filter
             set { watcher.Filter = value; }
         }
 
+#if FEATURE_FILE_SYSTEM_WATCHER_FILTERS
+        public override System.Collections.ObjectModel.Collection<string> Filters
+        {
+            get { return watcher.Filters; }
+        }
+#endif
+
         public override int InternalBufferSize
         {
             get { return watcher.InternalBufferSize; }

src/System.IO.Abstractions/IFileSystemWatcher.cs

@@ -10,6 +10,10 @@ public interface IFileSystemWatcher : IDisposable
         bool EnableRaisingEvents { get; set; }
         /// <inheritdoc cref="FileSystemWatcher.Filter"/>
         string Filter { get; set; }
+#if FEATURE_FILE_SYSTEM_WATCHER_FILTERS
+        /// <inheritdoc cref="FileSystemWatcher.Filters"/>
+        System.Collections.ObjectModel.Collection<string> Filters { get; }
+#endif
         /// <inheritdoc cref="FileSystemWatcher.InternalBufferSize"/>
         int InternalBufferSize { get; set; }
         /// <inheritdoc cref="FileSystemWatcher.NotifyFilter"/>

tests/System.IO.Abstractions.TestingHelpers.Tests/MockFileSystemTests.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.ComponentModel;
 using System.Linq;
 using System.Reflection;
@@ -408,6 +409,9 @@ public TestFileSystemWatcher(string path, string filter)
             public override NotifyFilters NotifyFilter { get; set; }
             public override ISite Site { get; set; }
             public override ISynchronizeInvoke SynchronizingObject { get; set; }
+#if FEATURE_FILE_SYSTEM_WATCHER_FILTERS
+            public override Collection<string> Filters { get; }
+#endif
             public override void BeginInit() { }
             public override void EndInit() { }
             public override WaitForChangedResult WaitForChanged(WatcherChangeTypes changeType) => default(WaitForChangedResult);

tests/System.IO.Abstractions.Tests/ApiParityTests.cs

@@ -52,6 +52,13 @@ public void Path() =>
                 typeof(System.IO.Abstractions.PathBase)
             );
 
+        [Test]
+        public void FileSystemWatcher() =>
+            AssertParity(
+                typeof(System.IO.FileSystemWatcher),
+                typeof(System.IO.Abstractions.FileSystemWatcherBase)
+            );
+
         private void AssertParity(Type referenceType, Type abstractionType)
         {
             static IEnumerable<string> GetMembers(Type type) => type

tests/System.IO.Abstractions.Tests/__snapshots__/ApiParityTests.FileSystemWatcher_.NET 5.0.snap

@@ -0,0 +1,17 @@
+{
+  "ExtraMembers": [
+    "Void Dispose(Boolean)"
+  ],
+  "MissingMembers": [
+    "System.ComponentModel.IContainer Container",
+    "System.ComponentModel.IContainer get_Container()",
+    "System.EventHandler Disposed",
+    "System.Object GetLifetimeService()",
+    "System.Object InitializeLifetimeService()",
+    "Void .ctor()",
+    "Void .ctor(System.String)",
+    "Void .ctor(System.String, System.String)",
+    "Void add_Disposed(System.EventHandler)",
+    "Void remove_Disposed(System.EventHandler)"
+  ]
+}

tests/System.IO.Abstractions.Tests/__snapshots__/ApiParityTests.FileSystemWatcher_.NET Core 2.1.snap

@@ -0,0 +1,17 @@
+{
+  "ExtraMembers": [
+    "Void Dispose(Boolean)"
+  ],
+  "MissingMembers": [
+    "System.ComponentModel.IContainer Container",
+    "System.ComponentModel.IContainer get_Container()",
+    "System.EventHandler Disposed",
+    "System.Object GetLifetimeService()",
+    "System.Object InitializeLifetimeService()",
+    "Void .ctor()",
+    "Void .ctor(System.String)",
+    "Void .ctor(System.String, System.String)",
+    "Void add_Disposed(System.EventHandler)",
+    "Void remove_Disposed(System.EventHandler)"
+  ]
+}

tests/System.IO.Abstractions.Tests/__snapshots__/ApiParityTests.FileSystemWatcher_.NET Core 3.1.snap

@@ -0,0 +1,19 @@
+{
+  "ExtraMembers": [
+    "Void Dispose(Boolean)"
+  ],
+  "MissingMembers": [
+    "System.Collections.ObjectModel.Collection`1[System.String] Filters",
+    "System.Collections.ObjectModel.Collection`1[System.String] get_Filters()",
+    "System.ComponentModel.IContainer Container",
+    "System.ComponentModel.IContainer get_Container()",
+    "System.EventHandler Disposed",
+    "System.Object GetLifetimeService()",
+    "System.Object InitializeLifetimeService()",
+    "Void .ctor()",
+    "Void .ctor(System.String)",
+    "Void .ctor(System.String, System.String)",
+    "Void add_Disposed(System.EventHandler)",
+    "Void remove_Disposed(System.EventHandler)"
+  ]
+}

tests/System.IO.Abstractions.Tests/__snapshots__/ApiParityTests.FileSystemWatcher_.NET Framework 4.6.1.snap

@@ -0,0 +1,18 @@
+{
+  "ExtraMembers": [
+    "Void Dispose(Boolean)"
+  ],
+  "MissingMembers": [
+    "System.ComponentModel.IContainer Container",
+    "System.ComponentModel.IContainer get_Container()",
+    "System.EventHandler Disposed",
+    "System.Object GetLifetimeService()",
+    "System.Object InitializeLifetimeService()",
+    "System.Runtime.Remoting.ObjRef CreateObjRef(System.Type)",
+    "Void .ctor()",
+    "Void .ctor(System.String)",
+    "Void .ctor(System.String, System.String)",
+    "Void add_Disposed(System.EventHandler)",
+    "Void remove_Disposed(System.EventHandler)"
+  ]
+}

version.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://raw.githubusercontent.com/AArnott/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "13.1",
+  "version": "13.2",
   "assemblyVersion": {
     "precision": "major"
   },