Extract throwIfMoreThanOneCodegenNativecommands error in error-utils (f…

…acebook#36407)

Summary:
Part of Codegen Umbrella Issue: facebook#34872
> [Codegen 99] Extract the throwIfMoreThanOneCodegenNativecommands error in the error-utils.js file and extract the error code from [Flow](https://github.com/facebook/react-native/blob/main/packages/react-native-codegen/src/parsers/flow/components/index.js#L111-L133) and [TS](https://github.com/facebook/react-native/blob/main/packages/react-native-codegen/src/parsers/typescript/components/index.js#L112-L114)

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[Internal] [Changed] - Extract throwIfMoreThanOneCodegenNativecommands error in error-utils

Pull Request resolved: facebook#36407

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

Reviewed By: christophpurrer

Differential Revision: D43912403

Pulled By: cipolleschi

fbshipit-source-id: 1c51fc01465a1baa5f06ccea09c3342584bb82cc

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

@@ -27,6 +27,7 @@ const {
   throwIfArrayElementTypeAnnotationIsUnsupported,
   throwIfPartialNotAnnotatingTypeParameter,
   throwIfPartialWithMoreParameter,
+  throwIfMoreThanOneCodegenNativecommands,
 } = require('../error-utils');
 const {
   UnsupportedModulePropertyParserError,
@@ -818,3 +819,33 @@ describe('throwIfPartialWithMoreParameter', () => {
     }).not.toThrowError();
   });
 });
+
+describe('throwIfMoreThanOneCodegenNativecommands', () => {
+  it('throws an error if given more than one codegenNativeCommands', () => {
+    const commandsTypeNames = [
+      {
+        commandTypeName: '',
+        commandOptionsExpression: {},
+      },
+      {
+        commandTypeName: '',
+        commandOptionsExpression: {},
+      },
+    ];
+    expect(() => {
+      throwIfMoreThanOneCodegenNativecommands(commandsTypeNames);
+    }).toThrowError('codegenNativeCommands may only be called once in a file');
+  });
+
+  it('does not throw an error if given exactly one codegenNativeCommand', () => {
+    const commandsTypeNames = [
+      {
+        commandTypeName: '',
+        commandOptionsExpression: {},
+      },
+    ];
+    expect(() => {
+      throwIfMoreThanOneCodegenNativecommands(commandsTypeNames);
+    }).not.toThrow();
+  });
+});

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

@@ -290,6 +290,14 @@ function throwIfPartialWithMoreParameter(typeAnnotation: $FlowFixMe) {
   }
 }
 
+function throwIfMoreThanOneCodegenNativecommands(
+  commandsTypeNames: $ReadOnlyArray<$FlowFixMe>,
+) {
+  if (commandsTypeNames.length > 1) {
+    throw new Error('codegenNativeCommands may only be called once in a file');
+  }
+}
+
 module.exports = {
   throwIfModuleInterfaceIsMisnamed,
   throwIfUnsupportedFunctionReturnTypeAnnotationParserError,
@@ -307,4 +315,5 @@ module.exports = {
   throwIfIncorrectModuleRegistryCallArgument,
   throwIfPartialNotAnnotatingTypeParameter,
   throwIfPartialWithMoreParameter,
+  throwIfMoreThanOneCodegenNativecommands,
 };

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

@@ -21,6 +21,7 @@ const {getCommandOptions, getOptions} = require('./options');
 const {getProps} = require('./props');
 const {getProperties} = require('./componentsUtils.js');
 const {createComponentConfig} = require('../../parsers-commons');
+const {throwIfMoreThanOneCodegenNativecommands} = require('../../error-utils');
 
 /* $FlowFixMe[missing-local-annot] The type annotation(s) required by Flow's
  * LTI update could not be added via codemod */
@@ -109,9 +110,7 @@ function findComponentConfig(ast) {
     })
     .filter(Boolean);
 
-  if (commandsTypeNames.length > 1) {
-    throw new Error('codegenNativeCommands may only be called once in a file');
-  }
+  throwIfMoreThanOneCodegenNativecommands(commandsTypeNames);
 
   return createComponentConfig(foundConfig, commandsTypeNames);
 }

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

@@ -22,6 +22,7 @@ const {getCommandOptions, getOptions} = require('./options');
 const {getProps} = require('./props');
 const {getProperties} = require('./componentsUtils.js');
 const {createComponentConfig} = require('../../parsers-commons');
+const {throwIfMoreThanOneCodegenNativecommands} = require('../../error-utils');
 
 /* $FlowFixMe[missing-local-annot] The type annotation(s) required by Flow's
  * LTI update could not be added via codemod */
@@ -110,9 +111,7 @@ function findComponentConfig(ast) {
     })
     .filter(Boolean);
 
-  if (commandsTypeNames.length > 1) {
-    throw new Error('codegenNativeCommands may only be called once in a file');
-  }
+  throwIfMoreThanOneCodegenNativecommands(commandsTypeNames);
 
   return createComponentConfig(foundConfig, commandsTypeNames);
 }