fix: do not add react-native package prefix if not needed (#435)

* fix: do not add react-native package prefix if not needed
* add test
* add test snapshot

Author: Chris Brody

lib/normalized-options.js

@@ -2,7 +2,15 @@ const { paramCase } = require('param-case');
 
 const { pascalCase } = require('pascal-case');
 
-const PACKAGE_PREFIX = 'react-native';
+const PACKAGE_NAME_PREFIX = 'react-native-';
+
+function transformPackageName (name) {
+  const paramCaseName = paramCase(name);
+
+  return paramCaseName.startsWith(PACKAGE_NAME_PREFIX)
+    ? paramCaseName
+    : PACKAGE_NAME_PREFIX + paramCaseName;
+}
 
 module.exports = (options) => {
   const { name, packageName, objectClassName } = options;
@@ -20,10 +28,7 @@ module.exports = (options) => {
     options,
     packageName
       ? {}
-      : {
-        // TODO: do not add PACKAGE_PREFIX if it is not needed
-        packageName: `${PACKAGE_PREFIX}-${paramCase(name)}`
-      },
+      : { packageName: transformPackageName(name) },
     objectClassName
       ? {}
       : { objectClassName: `${pascalCase(name)}` },