Extract the function createParserErrorCapturer into a single function…

… in the parsers/utils.js file (#34934)

Summary:
This PR aims to reduce code duplication by extracting `createParserErrorCapturer` function from the flow and typescript folders into a shared parsers/utils.js file. It is a task of #34872:
> Extract the function createParserErrorCapturer ([Flow](https://github.com/facebook/react-native/blob/main/packages/react-native-codegen/src/parsers/flow/utils.js#L122-L143) [TypeScript](https://github.com/facebook/react-native/blob/main/packages/react-native-codegen/src/parsers/typescript/utils.js#L114-L135)) into a single function in the parsers/utils.js file and replace its invocation with this new function.

## Changelog

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[Internal] [Changed] - Extract the function createParserErrorCapturer into a single function in the parsers/utils.js file

Pull Request resolved: #34934

Test Plan:
yarn flow:
<img width="628" alt="image" src="https://user-images.githubusercontent.com/40902940/194948886-d6763e39-ea07-4004-86cc-5287c4783012.png">

yarn lint:
<img width="509" alt="image" src="https://user-images.githubusercontent.com/40902940/194948916-3e54afa5-7e0b-4a61-ac18-8ec306d8c6d4.png">

yarn jest react-native-codegen:
<img width="386" alt="image" src="https://user-images.githubusercontent.com/40902940/194948966-d1e5b12e-02ab-4d53-a4bf-6abaf4d70fbe.png">

Reviewed By: cipolleschi

Differential Revision: D40256048

Pulled By: cipolleschi

fbshipit-source-id: 098519a17d6e3128d236c639b246a706f9dbf66d

packages/eslint-plugin-specs/react-native-modules.js

@@ -35,7 +35,7 @@ function requireModuleParser() {
 
       withBabelRegister(config, () => {
         RNModuleParser = require('react-native-codegen/src/parsers/flow/modules');
-        RNParserUtils = require('react-native-codegen/src/parsers/flow/utils');
+        RNParserUtils = require('react-native-codegen/src/parsers/utils');
       });
     } else {
       const config = {
@@ -45,7 +45,7 @@ function requireModuleParser() {
 
       withBabelRegister(config, () => {
         RNModuleParser = require('react-native-codegen/lib/parsers/flow/modules');
-        RNParserUtils = require('react-native-codegen/lib/parsers/flow/utils');
+        RNParserUtils = require('react-native-codegen/lib/parsers/utils');
       });
     }
   }

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

@@ -4,12 +4,18 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @flow strict-local
  * @format
  * @oncall react_native
  */
 
 'use strict';
-const {extractNativeModuleName} = require('../utils.js');
+
+const {
+  extractNativeModuleName,
+  createParserErrorCapturer,
+} = require('../utils.js');
+const {ParserError} = require('../errors');
 
 describe('extractnativeModuleName', () => {
   it('return filename when it ends with .js', () => {
@@ -63,3 +69,49 @@ describe('extractnativeModuleName', () => {
     expect(nativeModuleName).toBe('NativeModule');
   });
 });
+
+describe('createParserErrorCapturer', () => {
+  describe("when function doesn't throw", () => {
+    it("returns result and doesn't change errors array", () => {
+      const [errors, guard] = createParserErrorCapturer();
+      const fn = () => 'result';
+
+      const result = guard(fn);
+      expect(result).toBe('result');
+      expect(errors).toHaveLength(0);
+    });
+  });
+
+  describe('when function throws a ParserError', () => {
+    it('returns null and adds the error in errors array instead of throwing it', () => {
+      const [errors, guard] = createParserErrorCapturer();
+      const ErrorThrown = new ParserError(
+        'moduleName',
+        null,
+        'Something went wrong :(',
+      );
+      const fn = () => {
+        throw ErrorThrown;
+      };
+
+      const result = guard(fn);
+      expect(result).toBe(null);
+      expect(errors).toHaveLength(1);
+      expect(errors[0]).toEqual(ErrorThrown);
+      expect(() => guard(fn)).not.toThrow();
+    });
+  });
+
+  describe('when function throws another error', () => {
+    it("throws the error and doesn't change errors array", () => {
+      const [errors, guard] = createParserErrorCapturer();
+      const errorMessage = 'Something else went wrong :(';
+      const fn = () => {
+        throw new Error(errorMessage);
+      };
+
+      expect(() => guard(fn)).toThrow(errorMessage);
+      expect(errors).toHaveLength(0);
+    });
+  });
+});

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

@@ -14,16 +14,15 @@ import type {SchemaType} from '../../CodegenSchema.js';
 // $FlowFixMe[untyped-import] there's no flowtype flow-parser
 const flowParser = require('flow-parser');
 const fs = require('fs');
-const {extractNativeModuleName} = require('../utils.js');
+const {
+  extractNativeModuleName,
+  createParserErrorCapturer,
+} = require('../utils.js');
 const {buildComponentSchema} = require('./components');
 const {wrapComponentSchema} = require('./components/schema');
 const {buildModuleSchema} = require('./modules');
 const {wrapModuleSchema} = require('../parsers-commons');
-const {
-  createParserErrorCapturer,
-  visit,
-  isModuleRegistryCall,
-} = require('./utils');
+const {visit, isModuleRegistryCall} = require('./utils');
 const invariant = require('invariant');
 
 function getConfigType(

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

@@ -23,7 +23,7 @@ import type {
 } from '../../../CodegenSchema.js';
 
 import type {TypeDeclarationMap} from '../utils.js';
-import type {ParserErrorCapturer} from '../utils';
+import type {ParserErrorCapturer} from '../../utils';
 import type {NativeModuleTypeAnnotation} from '../../../CodegenSchema.js';
 
 const {

packages/react-native-codegen/src/parsers/flow/utils.js

@@ -12,8 +12,6 @@
 
 import type {TypeAliasResolutionStatus} from '../utils';
 
-const {ParserError} = require('../errors');
-
 /**
  * This FlowFixMe is supposed to refer to an InterfaceDeclaration or TypeAlias
  * declaration type. Unfortunately, we don't have those types, because flow-parser
@@ -119,29 +117,6 @@ function getValueFromTypes(value: ASTNode, types: TypeDeclarationMap): ASTNode {
   return value;
 }
 
-export type ParserErrorCapturer = <T>(fn: () => T) => ?T;
-
-function createParserErrorCapturer(): [
-  Array<ParserError>,
-  ParserErrorCapturer,
-] {
-  const errors = [];
-  function guard<T>(fn: () => T): ?T {
-    try {
-      return fn();
-    } catch (error) {
-      if (!(error instanceof ParserError)) {
-        throw error;
-      }
-      errors.push(error);
-
-      return null;
-    }
-  }
-
-  return [errors, guard];
-}
-
 // TODO(T71778680): Flow-type ASTNodes.
 function visit(
   astNode: $FlowFixMe,
@@ -213,7 +188,6 @@ function isModuleRegistryCall(node: $FlowFixMe): boolean {
 module.exports = {
   getValueFromTypes,
   resolveTypeAnnotation,
-  createParserErrorCapturer,
   getTypes,
   visit,
   isModuleRegistryCall,

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

@@ -13,17 +13,16 @@
 import type {SchemaType} from '../../CodegenSchema.js';
 const babelParser = require('@babel/parser');
 const fs = require('fs');
-const {extractNativeModuleName} = require('../utils.js');
+const {
+  extractNativeModuleName,
+  createParserErrorCapturer,
+} = require('../utils.js');
 const {buildComponentSchema} = require('./components');
 const {wrapComponentSchema} = require('./components/schema');
 const {buildModuleSchema} = require('./modules');
 const {wrapModuleSchema} = require('../parsers-commons');
 
-const {
-  createParserErrorCapturer,
-  visit,
-  isModuleRegistryCall,
-} = require('./utils');
+const {visit, isModuleRegistryCall} = require('./utils');
 const invariant = require('invariant');
 
 function getConfigType(

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

@@ -23,7 +23,7 @@ import type {
 } from '../../../CodegenSchema.js';
 
 import type {TypeDeclarationMap} from '../utils.js';
-import type {ParserErrorCapturer} from '../utils';
+import type {ParserErrorCapturer} from '../../utils';
 import type {NativeModuleTypeAnnotation} from '../../../CodegenSchema.js';
 
 const {

packages/react-native-codegen/src/parsers/typescript/utils.js

@@ -12,7 +12,6 @@
 
 import type {TypeAliasResolutionStatus} from '../utils';
 
-const {ParserError} = require('../errors');
 const {parseTopLevelType} = require('./parseTopLevelType');
 
 /**
@@ -111,29 +110,6 @@ function resolveTypeAnnotation(
   };
 }
 
-export type ParserErrorCapturer = <T>(fn: () => T) => ?T;
-
-function createParserErrorCapturer(): [
-  Array<ParserError>,
-  ParserErrorCapturer,
-] {
-  const errors = [];
-  function guard<T>(fn: () => T): ?T {
-    try {
-      return fn();
-    } catch (error) {
-      if (!(error instanceof ParserError)) {
-        throw error;
-      }
-      errors.push(error);
-
-      return null;
-    }
-  }
-
-  return [errors, guard];
-}
-
 // TODO(T108222691): Use flow-types for @babel/parser
 function visit(
   astNode: $FlowFixMe,
@@ -204,7 +180,6 @@ function isModuleRegistryCall(node: $FlowFixMe): boolean {
 
 module.exports = {
   resolveTypeAnnotation,
-  createParserErrorCapturer,
   getTypes,
   visit,
   isModuleRegistryCall,

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

@@ -10,6 +10,8 @@
 
 'use strict';
 
+const {ParserError} = require('./errors');
+
 const path = require('path');
 
 export type TypeAliasResolutionStatus =
@@ -27,6 +29,30 @@ function extractNativeModuleName(filename: string): string {
   return path.basename(filename).split('.')[0];
 }
 
+export type ParserErrorCapturer = <T>(fn: () => T) => ?T;
+
+function createParserErrorCapturer(): [
+  Array<ParserError>,
+  ParserErrorCapturer,
+] {
+  const errors = [];
+  function guard<T>(fn: () => T): ?T {
+    try {
+      return fn();
+    } catch (error) {
+      if (!(error instanceof ParserError)) {
+        throw error;
+      }
+      errors.push(error);
+
+      return null;
+    }
+  }
+
+  return [errors, guard];
+}
+
 module.exports = {
   extractNativeModuleName,
+  createParserErrorCapturer,
 };