fix: negative limit should not limit

Author: zombieJ

src/hooks/useSearchConfig.ts

@@ -22,8 +22,12 @@ export default function useSearchConfig(showSearch?: CascaderProps['showSearch']
       };
     }
 
-    if (process.env.NODE_ENV !== 'production' && searchConfig.limit <= 0) {
-      warning(false, "'limit' of showSearch should be positive number or false.");
+    if (searchConfig.limit <= 0) {
+      delete searchConfig.limit;
+
+      if (process.env.NODE_ENV !== 'production') {
+        warning(false, "'limit' of showSearch should be positive number or false.");
+      }
     }
 
     return [true, searchConfig];

tests/search.spec.tsx

@@ -161,12 +161,15 @@ describe('Cascader.Search', () => {
     resetWarned();
     const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => {});
 
-    mount(<Cascader showSearch={{ limit: 0 }} />);
+    const wrapper = mount(<Cascader options={options} showSearch={{ limit: 0 }} />);
 
     expect(errorSpy).toHaveBeenCalledWith(
       "Warning: 'limit' of showSearch should be positive number or false.",
     );
 
+    doSearch(wrapper, 'toy');
+    expect(wrapper.find('div.rc-cascader-menu-item-content')).toHaveLength(2);
+
     errorSpy.mockRestore();
   });
 });