add test case for checkbox handling context update

components/checkbox/__tests__/group.test.js

@@ -1,5 +1,6 @@
 import React from 'react';
 import { mount, render } from 'enzyme';
+import Collapse from '../../collapse';
 import Checkbox from '../index';
 import mountTest from '../../../tests/shared/mountTest';
 import rtlTest from '../../../tests/shared/rtlTest';
@@ -181,4 +182,44 @@ describe('CheckboxGroup', () => {
       .simulate('change');
     expect(onChange).toHaveBeenCalledWith([1, 2]);
   });
+
+  // https://github.com/ant-design/ant-design/issues/21134
+  it('should work when checkbox is wrapped by other components', () => {
+    const wrapper = mount(
+      <Checkbox.Group>
+        <Collapse bordered={false}>
+          <Collapse.Panel header="test panel">
+            <div>
+              <Checkbox value="1">item</Checkbox>
+            </div>
+          </Collapse.Panel>
+        </Collapse>
+      </Checkbox.Group>,
+    );
+    wrapper
+      .find('.ant-collapse-item')
+      .at(0)
+      .find('.ant-collapse-header')
+      .simulate('click');
+    wrapper
+      .find('.ant-checkbox-input')
+      .at(0)
+      .simulate('change');
+    expect(
+      wrapper
+        .find(Checkbox.Group)
+        .at(0)
+        .state('value'),
+    ).toEqual(['1']);
+    wrapper
+      .find('.ant-checkbox-input')
+      .at(0)
+      .simulate('change');
+    expect(
+      wrapper
+        .find(Checkbox.Group)
+        .at(0)
+        .state('value'),
+    ).toEqual([]);
+  });
 });