chore: fix snapshot

components/tree/__tests__/__snapshots__/demo.test.js.snap

@@ -2310,7 +2310,28 @@ Array [
         >
           <span
             class="ant-tree-switcher ant-tree-switcher_open"
-          />
+          >
+            <span
+              aria-label="down"
+              class="anticon anticon-down ant-tree-switcher-icon"
+              role="img"
+            >
+              <svg
+                aria-hidden="true"
+                class=""
+                data-icon="down"
+                fill="currentColor"
+                focusable="false"
+                height="1em"
+                viewBox="64 64 896 896"
+                width="1em"
+              >
+                <path
+                  d="M884 256h-75c-5.1 0-9.9 2.5-12.9 6.6L512 654.2 227.9 262.6c-3-4.1-7.8-6.6-12.9-6.6h-75c-6.5 0-10.3 7.4-6.5 12.7l352.6 486.1c12.8 17.6 39 17.6 51.7 0l352.6-486.1c3.9-5.3.1-12.7-6.4-12.7z"
+                />
+              </svg>
+            </span>
+          </span>
           <span
             class="ant-tree-node-content-wrapper ant-tree-node-content-wrapper-open"
             title="parent 1"
@@ -2335,7 +2356,28 @@ Array [
           </span>
           <span
             class="ant-tree-switcher ant-tree-switcher_open"
-          />
+          >
+            <span
+              aria-label="down"
+              class="anticon anticon-down ant-tree-switcher-icon"
+              role="img"
+            >
+              <svg
+                aria-hidden="true"
+                class=""
+                data-icon="down"
+                fill="currentColor"
+                focusable="false"
+                height="1em"
+                viewBox="64 64 896 896"
+                width="1em"
+              >
+                <path
+                  d="M884 256h-75c-5.1 0-9.9 2.5-12.9 6.6L512 654.2 227.9 262.6c-3-4.1-7.8-6.6-12.9-6.6h-75c-6.5 0-10.3 7.4-6.5 12.7l352.6 486.1c12.8 17.6 39 17.6 51.7 0l352.6-486.1c3.9-5.3.1-12.7-6.4-12.7z"
+                />
+              </svg>
+            </span>
+          </span>
           <span
             class="ant-tree-node-content-wrapper ant-tree-node-content-wrapper-open"
             title="parent 1-0"
@@ -2507,7 +2549,28 @@ Array [
           </span>
           <span
             class="ant-tree-switcher ant-tree-switcher_close"
-          />
+          >
+            <span
+              aria-label="down"
+              class="anticon anticon-down ant-tree-switcher-icon"
+              role="img"
+            >
+              <svg
+                aria-hidden="true"
+                class=""
+                data-icon="down"
+                fill="currentColor"
+                focusable="false"
+                height="1em"
+                viewBox="64 64 896 896"
+                width="1em"
+              >
+                <path
+                  d="M884 256h-75c-5.1 0-9.9 2.5-12.9 6.6L512 654.2 227.9 262.6c-3-4.1-7.8-6.6-12.9-6.6h-75c-6.5 0-10.3 7.4-6.5 12.7l352.6 486.1c12.8 17.6 39 17.6 51.7 0l352.6-486.1c3.9-5.3.1-12.7-6.4-12.7z"
+                />
+              </svg>
+            </span>
+          </span>
           <span
             class="ant-tree-node-content-wrapper ant-tree-node-content-wrapper-close"
             title="parent 1-1"
@@ -2532,7 +2595,28 @@ Array [
           </span>
           <span
             class="ant-tree-switcher ant-tree-switcher_close"
-          />
+          >
+            <span
+              aria-label="down"
+              class="anticon anticon-down ant-tree-switcher-icon"
+              role="img"
+            >
+              <svg
+                aria-hidden="true"
+                class=""
+                data-icon="down"
+                fill="currentColor"
+                focusable="false"
+                height="1em"
+                viewBox="64 64 896 896"
+                width="1em"
+              >
+                <path
+                  d="M884 256h-75c-5.1 0-9.9 2.5-12.9 6.6L512 654.2 227.9 262.6c-3-4.1-7.8-6.6-12.9-6.6h-75c-6.5 0-10.3 7.4-6.5 12.7l352.6 486.1c12.8 17.6 39 17.6 51.7 0l352.6-486.1c3.9-5.3.1-12.7-6.4-12.7z"
+                />
+              </svg>
+            </span>
+          </span>
           <span
             class="ant-tree-node-content-wrapper ant-tree-node-content-wrapper-close"
             title="parent 1-2"

components/tree/demo/switcher-icon.md

@@ -14,7 +14,8 @@ title:
 customize collapse/expand icon of tree node
 
 ```jsx
-import { Tree, Icon } from 'antd';
+import { Tree } from 'antd';
+import { Down } from '@ant-design/icons';
 
 const { TreeNode } = Tree;
 
@@ -27,7 +28,7 @@ class Demo extends React.Component {
     return (
       <Tree
         showLine
-        switcherIcon={<Icon type="down" />}
+        switcherIcon={<Down />}
         defaultExpandedKeys={['0-0-0']}
         onSelect={this.onSelect}
       >