fix(Field.NationalIdentityNumber): validate on all digits(not only 11 digits)

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/feature-fields/NationalIdentityNumber/demos.mdx

@@ -66,6 +66,6 @@ You can provide your own validation function.
 
 ### Extend validation with custom validation function
 
-You can [extend the existing validations](/uilib/extensions/forms/create-component/useFieldProps/info/#validators)(`dnrValidator` and `fnrValidator`) with your own validation function.
+You can [extend the existing validations](/uilib/extensions/forms/create-component/useFieldProps/info/#validators)(`dnrValidator`, `fnrValidator`, and `dnrAndFnrValidator`) with your own validation function.
 
 <Examples.ValidationExtendValidator />

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/feature-fields/NationalIdentityNumber/properties.mdx

@@ -17,6 +17,18 @@ import { NationalIdentityNumberProperties } from '@dnb/eufemia/src/extensions/fo
 
 <PropertiesTable props={fieldProperties} />
 
+## Validators
+
+`Field.NationalIdentityNumber` expose the following validators through its `validator` and `onBlurValidator` property:
+
+- `dnrValidator`: validates a d number.
+- `fnrValidator`: validates a national identity number (fødselsnummer).
+- `dnrAndFnrValidator`:
+  - validates the identification number as a d number when first digit is 4 or greater (because a d number has its first number increased by 4).
+  - validates the identification number as a national identity number (fødselsnummer) when first digit is 3 or less.
+
+See the following [example](/uilib/extensions/forms/feature-fields/NationalIdentityNumber/#extend-validation-with-custom-validation-function) on how to extend validation using the exposed validators.
+
 ## Translations
 
 <TranslationsTable localeKey={['NationalIdentityNumber', 'Field']} />

packages/dnb-eufemia/src/extensions/forms/Field/NationalIdentityNumber/NationalIdentityNumber.tsx

@@ -46,10 +46,8 @@ function NationalIdentityNumber(props: Props) {
 
   const fnrValidator = useCallback(
     (value: string) => {
-      if (
-        new RegExp(validationPattern).test(value) &&
-        fnr(value).status === 'invalid'
-      ) {
+      // have to check for undefined as @navikt/fnrvalidator does not support undefined
+      if (value === undefined || fnr(value).status === 'invalid') {
         return Error(errorFnr)
       }
     },
@@ -58,11 +56,8 @@ function NationalIdentityNumber(props: Props) {
 
   const dnrValidator = useCallback(
     (value: string) => {
-      const validationPattern = '^[4-7]([0-9]{10}$)' // 1st num is increased by 4. i.e, if 01.01.1985, D number would be 410185.
-      if (
-        new RegExp(validationPattern).test(value) &&
-        dnr(value).status === 'invalid'
-      ) {
+      // have to check for undefined as @navikt/fnrvalidator does not support undefined
+      if (value === undefined || dnr(value).status === 'invalid') {
         return Error(errorDnr)
       }
     },
@@ -71,7 +66,12 @@ function NationalIdentityNumber(props: Props) {
 
   const dnrAndFnrValidator = useCallback(
     (value: string) => {
-      return dnrValidator(value) || fnrValidator(value)
+      const validationPattern = '^[4-9].*' // 1st num is increased by 4. i.e, if 01.01.1985, D number would be 410185.
+
+      if (new RegExp(validationPattern).test(value)) {
+        return dnrValidator(value)
+      }
+      return fnrValidator(value)
     },
     [dnrValidator, fnrValidator]
   )
@@ -93,7 +93,7 @@ function NationalIdentityNumber(props: Props) {
     onBlurValidator: validate
       ? props.onBlurValidator || dnrAndFnrValidator
       : undefined,
-    exportValidators: { dnrValidator, fnrValidator },
+    exportValidators: { dnrValidator, fnrValidator, dnrAndFnrValidator },
   }
 
   return <StringField {...StringFieldProps} />

packages/dnb-eufemia/src/extensions/forms/Field/NationalIdentityNumber/__tests__/NationalIdentityNumber.test.tsx

@@ -49,17 +49,53 @@ describe('Field.NationalIdentityNumber', () => {
     expect(screen.queryByRole('alert')).toBeInTheDocument()
   })
 
-  it('should execute validateInitially if required', async () => {
-    const { rerender } = render(
-      <Field.NationalIdentityNumber required validateInitially />
+  it('should validate "required"', async () => {
+    render(<Field.NationalIdentityNumber required validateInitially />)
+
+    expect(screen.queryByRole('alert')).toBeInTheDocument()
+    expect(screen.queryByRole('alert')).toHaveTextContent(
+      nb.NationalIdentityNumber.errorRequired
     )
+  })
+
+  it('should show "errorRequired" error message when "pattern" not matches', async () => {
+    render(<Field.NationalIdentityNumber validateInitially value="123" />)
 
     expect(screen.queryByRole('alert')).toBeInTheDocument()
+    expect(screen.queryByRole('alert')).toHaveTextContent(
+      nb.NationalIdentityNumber.errorRequired
+    )
+  })
+
+  it('should validate internal validator', async () => {
+    const { rerender } = render(
+      <Field.NationalIdentityNumber
+        validateInitially
+        pattern=".*"
+        value="123"
+      />
+    )
 
-    rerender(<Field.NationalIdentityNumber validateInitially />)
+    await waitFor(() => {
+      expect(screen.queryByRole('alert')).toBeInTheDocument()
+      expect(screen.queryByRole('alert')).toHaveTextContent(
+        nb.NationalIdentityNumber.errorFnr
+      )
+    })
+
+    rerender(
+      <Field.NationalIdentityNumber
+        validateInitially
+        pattern=".*"
+        value="456"
+      />
+    )
 
     await waitFor(() => {
-      expect(screen.queryByRole('alert')).not.toBeInTheDocument()
+      expect(screen.queryByRole('alert')).toBeInTheDocument()
+      expect(screen.queryByRole('alert')).toHaveTextContent(
+        nb.NationalIdentityNumber.errorDnr
+      )
     })
   })
 
@@ -362,13 +398,13 @@ describe('Field.NationalIdentityNumber', () => {
         : { status: 'invalid' }
 
     const customValidator: Validator<string> = (value, { validators }) => {
-      const { dnrValidator, fnrValidator } = validators
+      const { dnrAndFnrValidator } = validators
       const result = bornInApril(value)
       if (result.status === 'invalid') {
         return new Error('custom error')
       }
 
-      return [dnrValidator, fnrValidator]
+      return [dnrAndFnrValidator]
     }
 
     it.each(validIds)('Valid identity number: %s', async (fnrNum) => {