test: 增加单元测试

Author: ArgoZhang

src/BootstrapBlazor/Services/MediaDevices/DefaultVideoDevice.cs

@@ -37,16 +37,6 @@ public Task Capture()
         return deviceService.Capture();
     }
 
-    public Task Preview()
-    {
-        throw new NotImplementedException();
-    }
-
-    public Task<Stream?> GetPreviewImage()
-    {
-        throw new NotImplementedException();
-    }
-
     public Task<string?> GetPreviewUrl()
     {
         return deviceService.GetPreviewUrl();

src/BootstrapBlazor/Services/MediaDevices/DisplayMediaOptions.cs

@@ -36,17 +36,17 @@ public interface IVideoDevice
     /// <returns></returns>
     Task Capture();
 
-    /// <summary>
-    /// Preview a still image from the video stream.
-    /// </summary>
-    /// <returns></returns>
-    Task Preview();
-
-    /// <summary>
-    /// Gets the stream of the captured image.
-    /// </summary>
-    /// <returns></returns>
-    Task<Stream?> GetPreviewImage();
+    ///// <summary>
+    ///// Preview a still image from the video stream.
+    ///// </summary>
+    ///// <returns></returns>
+    //Task Preview();
+
+    ///// <summary>
+    ///// Gets the stream of the captured image.
+    ///// </summary>
+    ///// <returns></returns>
+    //Task<Stream?> GetPreviewImage();
 
     /// <summary>
     /// Gets the preview URL of the captured image.

src/BootstrapBlazor/Services/MediaDevices/IVideoDevice.cs

@@ -5,13 +5,28 @@
 
 namespace BootstrapBlazor.Components;
 
-class MediaDeviceInfo : IMediaDeviceInfo
+/// <summary>
+/// <inheritdoc/>
+/// </summary>
+public class MediaDeviceInfo : IMediaDeviceInfo
 {
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
     public string DeviceId { get; set; } = "";
 
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
     public string GroupId { get; set; } = "";
 
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
     public string Kind { get; set; } = "";
 
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
     public string Label { get; set; } = "";
 }

src/BootstrapBlazor/Services/MediaDevices/MediaDeviceInfo.cs

@@ -0,0 +1,53 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License
+// See the LICENSE file in the project root for more information.
+// Maintainer: Argo Zhang([email protected]) Website: https://www.blazor.zone
+
+namespace UnitTest.Services;
+
+public class VideoDeviceTest : BootstrapBlazorTestBase
+{
+    [Fact]
+    public async Task GetDevices_Ok()
+    {
+        Context.JSInterop.Setup<List<MediaDeviceInfo>>("enumerateDevices").SetResult([
+            new() { DeviceId = "test-device-id", GroupId = "test-groupd-id", Kind = "videoinput", Label="test-video" }
+        ]);
+        var service = Context.Services.GetRequiredService<IVideoDevice>();
+        var devices = await service.GetDevices();
+        Assert.NotNull(devices);
+        Assert.Equal("test-device-id", devices[0].DeviceId);
+        Assert.Equal("test-groupd-id", devices[0].GroupId);
+        Assert.Equal("videoinput", devices[0].Kind);
+        Assert.Equal("test-video", devices[0].Label);
+    }
+
+    [Fact]
+    public async Task Open_Ok()
+    {
+        Context.JSInterop.Setup<string?>("getPreviewUrl").SetResult("blob:https://test-preview");
+
+        var service = Context.Services.GetRequiredService<IVideoDevice>();
+        var options = new MediaTrackConstraints()
+        {
+            DeviceId = "test-device-id",
+            FacingMode = "user",
+            Height = 640,
+            Width = 480,
+            VideoSelector = ".bb-video"
+        };
+        await service.Open(options);
+        await service.Close(".bb-video");
+
+        Assert.Equal("test-device-id", options.DeviceId);
+        Assert.Equal("user", options.FacingMode);
+        Assert.Equal(640, options.Height);
+        Assert.Equal(480, options.Width);
+        Assert.Equal(".bb-video", options.VideoSelector);
+
+        await service.Capture();
+        await service.Flip();
+        var url = await service.GetPreviewUrl();
+        Assert.Equal("blob:https://test-preview", url);
+    }
+}