!2268 test(#I4OV1A): add empty component unit tests

* test: Empty 组件单元测试

test/UnitTest/Components/EmptyTest.cs

@@ -0,0 +1,85 @@
+// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+// Website: https://www.blazor.zone or https://argozhang.github.io/
+
+using BootstrapBlazor.Components;
+using Bunit;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using UnitTest.Core;
+using Xunit;
+
+namespace UnitTest.Components;
+
+public class EmptyTest : BootstrapBlazorTestBase
+{
+
+    [Fact]
+    public void Image_Ok()
+    {
+        var path = "/src/image/argo.png";
+        var cut = Context.RenderComponent<Empty>(builder => builder.Add(p => p.Image, path));
+
+        Assert.Contains(path, cut.Markup);
+    }
+
+    [Fact]
+    public void Text_Ok()
+    {
+        var text = "I am an Empty";
+        var cut = Context.RenderComponent<Empty>(builder => builder.Add(p => p.Text, text));
+
+        Assert.Contains(text, cut.Markup);
+    }
+
+    [Fact]
+    public void Width_Ok()
+    {
+        var cut = Context.RenderComponent<Empty>(builder =>
+        {
+            builder.Add(p => p.Width, "200");
+            builder.Add(i => i.Image, "/src/image/argo.png");
+        });
+
+        Assert.Contains("width=\"200\"", cut.Markup);
+    }
+
+    [Fact]
+    public void Height_Ok()
+    {
+        var cut = Context.RenderComponent<Empty>(builder =>
+        {
+            builder.Add(p => p.Height, "200");
+            builder.Add(i => i.Image, "/src/image/argo.png");
+        });
+
+        Assert.Contains("height=\"200\"", cut.Markup);
+    }
+
+    [Fact]
+    public void ChildContent_Ok()
+    {
+        var cut = Context.RenderComponent<Empty>(builder => builder.Add(p => p.ChildContent, r =>
+        {
+            r.OpenComponent<Button>(1);
+            r.CloseComponent();
+        }));
+
+        Assert.NotNull(cut.FindComponent<Button>());
+    }
+
+    [Fact]
+    public void Template_Ok()
+    {
+        var cut = Context.RenderComponent<Empty>(builder => builder.Add(p => p.Template, r =>
+        {
+            r.OpenComponent<Button>(1);
+            r.CloseComponent();
+        }));
+
+        Assert.NotNull(cut.FindComponent<Button>());
+    }
+}