Extract contents of the case 'VoidTypeAnnotation' into a single emitVoid function (#34932)

Summary:
Part of https://github.com/facebook/react-native/issues/34872

This PR:
- extracts the content of the case 'VoidTypeAnnotation' ([Flow](b444f0e44e/packages/react-native-codegen/src/parsers/flow/modules/index.js (L375-L377)), [TypeScript](00b795642a/packages/react-native-codegen/src/parsers/typescript/modules/index.js (L410-L412))) into a single emitVoid function in the parsers-primitives.js file. Use the new function in the parsers.
- unit tests emitVoid function

## Changelog

[Internal] [Changed] - Extract contents of the case 'VoidTypeAnnotation' into a single emitVoid function

Pull Request resolved: https://github.com/facebook/react-native/pull/34932

Test Plan:
` yarn jest react-native-codegen`

<img width="957" alt="image" src="https://user-images.githubusercontent.com/19575877/194931977-d5cfc5f5-c9db-498d-9e5c-ae40a38d3623.png">

Reviewed By: cipolleschi

Differential Revision: D40239730

Pulled By: rshest

fbshipit-source-id: 16a9555223cacbb3b9916fd469bd63f83db33f18

packages/react-native-codegen/src/parsers/__tests__/parsers-primitives-test.js

@@ -19,6 +19,7 @@ const {
   emitObject,
   emitPromise,
   emitRootTag,
+  emitVoid,
   typeAliasResolution,
 } = require('../parsers-primitives.js');
 
@@ -152,6 +153,32 @@ describe('emitDouble', () => {
   });
 });
 
+describe('emitVoid', () => {
+  describe('when nullable is true', () => {
+    it('returns nullable type annotation', () => {
+      const result = emitVoid(true);
+      const expected = {
+        type: 'NullableTypeAnnotation',
+        typeAnnotation: {
+          type: 'VoidTypeAnnotation',
+        },
+      };
+
+      expect(result).toEqual(expected);
+    });
+  });
+  describe('when nullable is false', () => {
+    it('returns non nullable type annotation', () => {
+      const result = emitVoid(false);
+      const expected = {
+        type: 'VoidTypeAnnotation',
+      };
+
+      expect(result).toEqual(expected);
+    });
+  });
+});
+
 describe('typeAliasResolution', () => {
   const objectTypeAnnotation = {
     type: 'ObjectTypeAnnotation',

packages/react-native-codegen/src/parsers/flow/modules/index.js

@@ -45,6 +45,7 @@ const {
   emitObject,
   emitPromise,
   emitRootTag,
+  emitVoid,
   typeAliasResolution,
 } = require('../../parsers-primitives');
 const {
@@ -345,9 +346,7 @@ function translateTypeAnnotation(
       return emitNumber(nullable);
     }
     case 'VoidTypeAnnotation': {
-      return wrapNullable(nullable, {
-        type: 'VoidTypeAnnotation',
-      });
+      return emitVoid(nullable);
     }
     case 'StringTypeAnnotation': {
       return wrapNullable(nullable, {

packages/react-native-codegen/src/parsers/parsers-primitives.js

@@ -23,6 +23,7 @@ import type {
   ReservedTypeAnnotation,
   ObjectTypeAnnotation,
   NativeModulePromiseTypeAnnotation,
+  VoidTypeAnnotation,
 } from '../CodegenSchema';
 import type {ParserType} from './errors';
 import type {TypeAliasResolutionStatus} from './utils';
@@ -65,6 +66,12 @@ function emitDouble(nullable: boolean): Nullable<DoubleTypeAnnotation> {
   });
 }
 
+function emitVoid(nullable: boolean): Nullable<VoidTypeAnnotation> {
+  return wrapNullable(nullable, {
+    type: 'VoidTypeAnnotation',
+  });
+}
+
 function typeAliasResolution(
   typeAliasResolutionStatus: TypeAliasResolutionStatus,
   objectTypeAnnotation: ObjectTypeAnnotation<
@@ -152,5 +159,6 @@ module.exports = {
   emitObject,
   emitPromise,
   emitRootTag,
+  emitVoid,
   typeAliasResolution,
 };

packages/react-native-codegen/src/parsers/typescript/modules/index.js

@@ -45,6 +45,7 @@ const {
   emitObject,
   emitPromise,
   emitRootTag,
+  emitVoid,
   typeAliasResolution,
 } = require('../../parsers-primitives');
 const {
@@ -380,9 +381,7 @@ function translateTypeAnnotation(
       return emitNumber(nullable);
     }
     case 'TSVoidKeyword': {
-      return wrapNullable(nullable, {
-        type: 'VoidTypeAnnotation',
-      });
+      return emitVoid(nullable);
     }
     case 'TSStringKeyword': {
       return wrapNullable(nullable, {