fix(Form): avoid merging sparse list patches into allValue (#771)

* fix(Form): avoid merging sparse list patches into allValue

* revert: drop mergeWith changes in useForm (not root cause)

* chore(deps): bump @rc-component/util from 1.5.0 to 1.6.2

Author: QDyanbing

package.json

@@ -50,7 +50,7 @@
   },
   "dependencies": {
     "@rc-component/async-validator": "^5.0.3",
-    "@rc-component/util": "^1.5.0",
+    "@rc-component/util": "^1.6.2",
     "clsx": "^2.1.1"
   },
   "devDependencies": {

tests/list.test.tsx

@@ -1139,4 +1139,36 @@ describe('Form.List', () => {
       { list: [{ name: 'John', tags: ['react', 'ts', 'redux'] }] },
     );
   });
+
+  it('should not drop list items when updating list item field', async () => {
+    const onValuesChange = jest.fn();
+
+    const { getAllByRole } = render(
+      <Form onValuesChange={onValuesChange}>
+        <Form.List
+          name="list"
+          initialValue={[{ name: 'A' }, { name: 'B' }, { name: 'C' }, { name: 'D' }]}
+        >
+          {fields =>
+            fields.map(field => (
+              <Field key={field.key} name={[field.name, 'name']}>
+                <input />
+              </Field>
+            ))
+          }
+        </Form.List>
+      </Form>,
+    );
+
+    // Change second item (index = 1)
+    fireEvent.change(getAllByRole('textbox')[1], {
+      target: { value: 'BB' },
+    });
+
+    const [, allValues] = onValuesChange.mock.calls.pop();
+
+    expect(allValues).toEqual({
+      list: [{ name: 'A' }, { name: 'BB' }, { name: 'C' }, { name: 'D' }],
+    });
+  });
 });