fix: unable to empty value when setting precision (#309)

* fix: unable to empty value when setting precision

* test: add test

* test: add onChange test

src/utils/MiniDecimal.ts

@@ -259,6 +259,9 @@ export default function getMiniDecimal(value: ValueType): DecimalClass {
  * Align the logic of toFixed to around like 1.5 => 2
  */
 export function toFixed(numStr: string, separatorStr: string, precision?: number) {
+  if (numStr === '') {
+    return '';
+  }
   const { negativeStr, integerStr, decimalStr } = trimNumber(numStr);
   const precisionDecimalStr = `${separatorStr}${decimalStr}`;
 

tests/decimal.test.tsx

@@ -133,5 +133,20 @@ describe('InputNumber.Decimal', () => {
 
       expect(wrapper.getInputValue()).toEqual('3');
     });
+
+    it('should empty value after removing value', () => {
+      const onChange = jest.fn();
+      const wrapper = mount(<InputNumber precision={2} onChange={onChange} />);
+
+      wrapper.focusInput();
+      wrapper.changeValue('3');
+      wrapper.changeValue('');
+
+      expect(wrapper.getInputValue()).toEqual('');
+
+      wrapper.blurInput();
+      expect(onChange).toHaveBeenCalledWith(null);
+      expect(wrapper.getInputValue()).toEqual('');
+    });
   });
 });

tests/util.test.tsx

@@ -135,5 +135,9 @@ describe('InputNumber.Util', () => {
       expect(toFixed('1.2', '.')).toEqual('1.2');
       expect(toFixed('1.000', '.')).toEqual('1');
     });
+
+    it('should return "" when input is ""', () => {
+      expect(toFixed('', '.')).toEqual('');
+    });
   });
 });