FIO-8597: fixed an issue with a blank value for a number component wi…

…th multiple values enabled

src/process/validation/rules/__tests__/validateNumber.test.ts

@@ -4,6 +4,7 @@ import { FieldError } from 'error';
 import { simpleNumberField } from './fixtures/components';
 import { generateProcessorContext } from './fixtures/util';
 import { validateNumber } from '../validateNumber';
+import { validateMultiple } from '../validateMultiple';
 
 it('Validating a valid number will return null', async () => {
     const component = simpleNumberField;
@@ -25,3 +26,16 @@ it('Validating an invalid number will return a FieldError', async () => {
     expect(result).to.be.instanceOf(FieldError);
     expect(result?.errorKeyOrMessage).to.contain('number');
 });
+
+it('Validating a multiple number with a blank value will return null', async () => {
+    const component = {
+        ...simpleNumberField,
+        multiple: true
+    };
+    const data = {
+        component: [null],
+    };
+    const context = generateProcessorContext(component, data);
+    const result = await validateMultiple(context);
+    expect(result).to.equal(null);
+});

src/process/validation/rules/validateNumber.ts

@@ -25,7 +25,7 @@ export const validateNumberSync: RuleFnSync = (context: ValidationContext) => {
     const error = new FieldError('number', context);
     const { value } = context;
 
-    if (typeof value !== 'number')  {
+    if (value && typeof value !== 'number')  {
         return error;
     }
     return null;