extract emitDouble from parsers modules to shared parsers-primitives (#34913)

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

This PR extracts the content of the case 'Double' ([Flow](https://github.com/facebook/react-native/blob/b444f0e44e0d8670139acea5f14c2de32c5e2ddc/packages/react-native-codegen/src/parsers/flow/modules/index.js#L202-L204), [TypeScript](https://github.com/facebook/react-native/blob/00b795642a6562fb52d6df12e367b84674994623/packages/react-native-codegen/src/parsers/typescript/modules/index.js#L1235-L237)) into a single emitDouble function in the parsers-primitives.js file. Use the new function in the parsers.

## Changelog

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[Internal] [Changed] - Extract contents of the case 'Double' into a single emitDouble function inside parsers-primitives

Pull Request resolved: https://github.com/facebook/react-native/pull/34913

Test Plan: I tested using jest and flow commands.

Reviewed By: cipolleschi

Differential Revision: D40216018

Pulled By: cipolleschi

fbshipit-source-id: bc2aaa7636fbd2f6c861e4d87e394d0e4875a4a5

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

@@ -13,10 +13,11 @@
 
 const {
   emitBoolean,
+  emitDouble,
   emitNumber,
   emitInt32,
   emitRootTag,
-} = require('../parsers-primitives');
+} = require('../parsers-primitives.js');
 
 describe('emitBoolean', () => {
   describe('when nullable is true', () => {
@@ -121,3 +122,29 @@ describe('emitRootTag', () => {
     });
   });
 });
+
+describe('emitDouble', () => {
+  describe('when nullable is true', () => {
+    it('returns nullable type annotation', () => {
+      const result = emitDouble(true);
+      const expected = {
+        type: 'NullableTypeAnnotation',
+        typeAnnotation: {
+          type: 'DoubleTypeAnnotation',
+        },
+      };
+
+      expect(result).toEqual(expected);
+    });
+  });
+  describe('when nullable is false', () => {
+    it('returns non nullable type annotation', () => {
+      const result = emitDouble(false);
+      const expected = {
+        type: 'DoubleTypeAnnotation',
+      };
+
+      expect(result).toEqual(expected);
+    });
+  });
+});

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

@@ -35,6 +35,7 @@ const {
 const {unwrapNullable, wrapNullable} = require('../../parsers-commons');
 const {
   emitBoolean,
+  emitDouble,
   emitNumber,
   emitInt32,
   emitRootTag,
@@ -204,9 +205,7 @@ function translateTypeAnnotation(
           return emitInt32(nullable);
         }
         case 'Double': {
-          return wrapNullable(nullable, {
-            type: 'DoubleTypeAnnotation',
-          });
+          return emitDouble(nullable);
         }
         case 'Float': {
           return wrapNullable(nullable, {

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

@@ -12,6 +12,7 @@
 
 import type {
   BooleanTypeAnnotation,
+  DoubleTypeAnnotation,
   Int32TypeAnnotation,
   NativeModuleNumberTypeAnnotation,
   Nullable,
@@ -47,8 +48,15 @@ function emitRootTag(nullable: boolean): Nullable<ReservedTypeAnnotation> {
   });
 }
 
+function emitDouble(nullable: boolean): Nullable<DoubleTypeAnnotation> {
+  return wrapNullable(nullable, {
+    type: 'DoubleTypeAnnotation',
+  });
+}
+
 module.exports = {
   emitBoolean,
+  emitDouble,
   emitInt32,
   emitNumber,
   emitRootTag,

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

@@ -35,6 +35,7 @@ const {
 const {unwrapNullable, wrapNullable} = require('../../parsers-commons');
 const {
   emitBoolean,
+  emitDouble,
   emitNumber,
   emitInt32,
   emitRootTag,
@@ -238,9 +239,7 @@ function translateTypeAnnotation(
           return emitInt32(nullable);
         }
         case 'Double': {
-          return wrapNullable(nullable, {
-            type: 'DoubleTypeAnnotation',
-          });
+          return emitDouble(nullable);
         }
         case 'Float': {
           return wrapNullable(nullable, {