[dotnet] [bidi] Support browser SetDownloadBehaviour command

dotnet/src/webdriver/BiDi/Browser/BrowserModule.cs

@@ -52,4 +52,25 @@ public async Task<GetClientWindowsResult> GetClientWindowsAsync(GetClientWindows
     {
         return await Broker.ExecuteCommandAsync<GetClientWindowsCommand, GetClientWindowsResult>(new(), options).ConfigureAwait(false);
     }
+
+    public async Task<EmptyResult> SetDownloadBehaviorAllowedAsync(string destinationFolder, SetDownloadBehaviorOptions? options = null)
+    {
+        var @params = new SetDownloadBehaviorParameters(new DownloadBehaviorAllowed(destinationFolder), options?.UserContexts);
+
+        return await Broker.ExecuteCommandAsync<SetDownloadBehaviorCommand, EmptyResult>(new SetDownloadBehaviorCommand(@params), options).ConfigureAwait(false);
+    }
+
+    public async Task<EmptyResult> SetDownloadBehaviorAllowedAsync(SetDownloadBehaviorOptions? options = null)
+    {
+        var @params = new SetDownloadBehaviorParameters(null, options?.UserContexts);
+
+        return await Broker.ExecuteCommandAsync<SetDownloadBehaviorCommand, EmptyResult>(new SetDownloadBehaviorCommand(@params), options).ConfigureAwait(false);
+    }
+
+    public async Task<EmptyResult> SetDownloadBehaviorDeniedAsync(SetDownloadBehaviorOptions? options = null)
+    {
+        var @params = new SetDownloadBehaviorParameters(new DownloadBehaviorDenied(), options?.UserContexts);
+
+        return await Broker.ExecuteCommandAsync<SetDownloadBehaviorCommand, EmptyResult>(new SetDownloadBehaviorCommand(@params), options).ConfigureAwait(false);
+    }
 }

dotnet/src/webdriver/BiDi/Browser/SetDownloadBehaviorCommand.cs

@@ -0,0 +1,43 @@
+// <copyright file="SetDownloadBehaviorCommand.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+using OpenQA.Selenium.BiDi.Communication;
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace OpenQA.Selenium.BiDi.Browser;
+
+internal sealed class SetDownloadBehaviorCommand(SetDownloadBehaviorParameters @params)
+    : Command<SetDownloadBehaviorParameters, EmptyResult>(@params, "browser.setDownloadBehavior");
+
+internal sealed record SetDownloadBehaviorParameters([property: JsonIgnore(Condition = JsonIgnoreCondition.Never)] DownloadBehavior? DownloadBehavior, IEnumerable<UserContext>? UserContexts) : Parameters;
+
+[JsonPolymorphic(TypeDiscriminatorPropertyName = "type")]
+[JsonDerivedType(typeof(DownloadBehaviorAllowed), "allowed")]
+[JsonDerivedType(typeof(DownloadBehaviorDenied), "denied")]
+internal abstract record DownloadBehavior;
+
+internal sealed record DownloadBehaviorAllowed(string DestinationFolder) : DownloadBehavior;
+
+internal sealed record DownloadBehaviorDenied : DownloadBehavior;
+
+public sealed class SetDownloadBehaviorOptions : CommandOptions
+{
+    public IEnumerable<UserContext>? UserContexts { get; set; }
+}

dotnet/src/webdriver/BiDi/Communication/Json/BiDiJsonSerializerContext.cs

@@ -86,6 +86,7 @@ namespace OpenQA.Selenium.BiDi.Communication.Json;
 [JsonSerializable(typeof(Browser.RemoveUserContextCommand))]
 [JsonSerializable(typeof(Browser.GetClientWindowsCommand))]
 [JsonSerializable(typeof(Browser.GetClientWindowsResult))]
+[JsonSerializable(typeof(Browser.SetDownloadBehaviorCommand))]
 [JsonSerializable(typeof(Browser.UserContextInfo))]
 [JsonSerializable(typeof(IReadOnlyList<Browser.UserContextInfo>))]
 [JsonSerializable(typeof(IReadOnlyList<Browser.ClientWindowInfo>))]

dotnet/test/common/BiDi/Browser/BrowserTest.cs

@@ -69,4 +69,37 @@ public async Task CanGetClientWindows()
         Assert.That(clientWindows, Has.Count.GreaterThanOrEqualTo(1));
         Assert.That(clientWindows[0].ClientWindow, Is.Not.Null);
     }
+
+    [Test]
+    [IgnoreBrowser(Selenium.Browser.Chrome, "Not supported yet?")]
+    [IgnoreBrowser(Selenium.Browser.Edge, "Not supported yet?")]
+    [IgnoreBrowser(Selenium.Browser.Firefox, "Not supported yet?")]
+    public async Task CanSetDownloadBehaviorAllowed()
+    {
+        var result = await bidi.Browser.SetDownloadBehaviorAllowedAsync("/my/path");
+
+        Assert.That(result, Is.Not.Null);
+    }
+
+    [Test]
+    [IgnoreBrowser(Selenium.Browser.Chrome, "Not supported yet?")]
+    [IgnoreBrowser(Selenium.Browser.Edge, "Not supported yet?")]
+    [IgnoreBrowser(Selenium.Browser.Firefox, "Not supported yet?")]
+    public async Task CanSetDownloadBehaviorAllowedDefault()
+    {
+        var result = await bidi.Browser.SetDownloadBehaviorAllowedAsync();
+
+        Assert.That(result, Is.Not.Null);
+    }
+
+    [Test]
+    [IgnoreBrowser(Selenium.Browser.Chrome, "Not supported yet?")]
+    [IgnoreBrowser(Selenium.Browser.Edge, "Not supported yet?")]
+    [IgnoreBrowser(Selenium.Browser.Firefox, "Not supported yet?")]
+    public async Task CanSetDownloadBehaviorDenied()
+    {
+        var result = await bidi.Browser.SetDownloadBehaviorDeniedAsync();
+
+        Assert.That(result, Is.Not.Null);
+    }
 }