fix(Cascader): should display Empty after click Clearable button (#5128)

ArgoZhang · web-flow · commit 73d72b1b2adb · 2025-01-16T16:52:43.000+08:00
* feat: 清空按钮不应该使用 Items 第一个值

* test: 更新单元测试
diff --git a/src/BootstrapBlazor/Components/Cascader/Cascader.razor.cs b/src/BootstrapBlazor/Components/Cascader/Cascader.razor.cs
@@ -170,7 +170,7 @@ private void SetDefaultValue(string defaultValue)
         }
         else
         {
-            CurrentValueAsString = Items.FirstOrDefault()?.Value ?? string.Empty;
+            CurrentValueAsString = string.Empty;
         }
         RefreshDisplayText();
     }
diff --git a/test/UnitTest/Components/CascaderTest.cs b/test/UnitTest/Components/CascaderTest.cs
@@ -159,7 +159,7 @@ public void SetDefaultValue_Ok()
             pb.Add(a => a.Items, items);
             pb.Add(a => a.Value, "Test");
         });
-        Assert.Equal("1", cut.Instance.Value);
+        Assert.Equal("", cut.Instance.Value);
 
         cut.SetParametersAndRender(pb =>
         {

Original file line number	Diff line number	Diff line change
`@@ -170,7 +170,7 @@ private void SetDefaultValue(string defaultValue)`
`170`	`170`	`}`
`171`	`171`	`else`
`172`	`172`	`{`
`173`		`- CurrentValueAsString = Items.FirstOrDefault()?.Value ?? string.Empty;`
	`173`	`+ CurrentValueAsString = string.Empty;`
`174`	`174`	`}`
`175`	`175`	`RefreshDisplayText();`
`176`	`176`	`}`
Original file line number	Diff line number	Diff line change
`@@ -159,7 +159,7 @@ public void SetDefaultValue_Ok()`
`159`	`159`	`pb.Add(a => a.Items, items);`
`160`	`160`	`pb.Add(a => a.Value, "Test");`
`161`	`161`	`});`
`162`		`- Assert.Equal("1", cut.Instance.Value);`
	`162`	`+ Assert.Equal("", cut.Instance.Value);`
`163`	`163`
`164`	`164`	`cut.SetParametersAndRender(pb =>`
`165`	`165`	`{`