fix(numericSelector): if no currentValue found, use the first option

Author: vvo

src/widgets/numeric-selector/__tests__/numeric-selector-test.js

@@ -44,7 +44,7 @@ describe('numericSelector()', () => {
         root: 'ais-numeric-selector custom-root cx',
         item: 'ais-numeric-selector--item custom-item'
       },
-      currentValue: undefined,
+      currentValue: 1,
       shouldAutoHideContainer: true,
       options: [
         {value: 1, label: 'first'},

src/widgets/numeric-selector/numeric-selector.js

@@ -60,7 +60,7 @@ function numericSelector({
 
   return {
     init({helper}) {
-      const currentValue = this._getRefinedValue(helper) || options[0].value;
+      const currentValue = this._getRefinedValue(helper);
       if (currentValue !== undefined) {
         helper.addNumericRefinement(attributeName, operator, currentValue);
       }
@@ -92,7 +92,7 @@ function numericSelector({
       const refinedValue = find(refinements, {operator});
       return refinedValue &&
         refinedValue.value !== undefined &&
-        refinedValue.value[0] !== undefined ? refinedValue.value[0] : undefined;
+        refinedValue.value[0] !== undefined ? refinedValue.value[0] : options[0].value;
     }
   };
 }