test: 更新单元测试

Author: ArgoZhang

test/UnitTest/Components/UploadAvatarTest.cs

@@ -83,7 +83,7 @@ await cut.InvokeAsync(() => input.Instance.OnChange.InvokeAsync(new InputFileCha
         {
             pb.Add(a => a.IsDisabled, true);
         });
-        cut.DoesNotContain("upload-item-actions");
+        cut.Contains("upload-item-actions");
 
         // IsUploadButtonAtFirst
         cut.SetParametersAndRender(pb =>
@@ -184,6 +184,19 @@ await cut.InvokeAsync(() =>
         });
     }
 
+    [Fact]
+    public void IsImage_Ok()
+    {
+        var file = new UploadFile
+        {
+            File = new MockBrowserFile("test.text")
+        };
+        Assert.True(file.IsImage([".text"]));
+
+        file.File = new MockBrowserFile("test.jpg", "image/jpeg");
+        Assert.True(file.IsImage());
+    }
+
     private class MockBrowserFile(string name = "UploadTestFile", string contentType = "text") : IBrowserFile
     {
         public string Name { get; } = name;