Fix bug in test input validation

src/antd/InputNumber.tsx

@@ -52,16 +52,17 @@ export const InputNumber = (props: InputNumberProps): InputNumber => {
     return ""
   })
   const parser = ((value?: string): number => {
-    if (value !== "" && value !== undefined) {
+    const isNumeric = value ? !isNaN(Number(value)) : false
+    if (isNumeric && value !== undefined) {
       if (isPercentage) {
         return parseFloat(value.replace("%", "")) / 100.0
       } else {
         return parseFloat(value)
       }
     }
     // this allows us to return undefined for cases where the value has been deleted
-    // when InputNumber is paired with a Slider, the Slider pointer will disappear
-    // insetad of jumping to some default value
+    // when InputNumber is paired with a Slider, the Slider value selector will disappear
+    // for required fields an error message will show instead of jumping to some default value
     return undefined as unknown as number
   })