From 2af02324413265ee4995836b8db21ffb5590ae74 Mon Sep 17 00:00:00 2001
From: Simen Bekkhus <sbekkhus91@gmail.com>
Date: Thu, 23 Apr 2020 09:41:49 +0200
Subject: [PATCH] refactor to helper function

---
 packages/jest-resolve/src/defaultResolver.ts | 41 +++++++++++---------
 1 file changed, 23 insertions(+), 18 deletions(-)

diff --git a/packages/jest-resolve/src/defaultResolver.ts b/packages/jest-resolve/src/defaultResolver.ts
index 94e2ee210e4f..2481a8c606c4 100644
--- a/packages/jest-resolve/src/defaultResolver.ts
+++ b/packages/jest-resolve/src/defaultResolver.ts
@@ -22,22 +22,6 @@ type ResolverOptions = {
   rootDir?: Config.Path;
 };
 
-function tolerantRealpath(path: Config.Path): Config.Path {
-  try {
-    const resolved = realpath(path);
-
-    if (resolved) {
-      return resolved;
-    }
-  } catch (error) {
-    if (error.code !== 'ENOENT') {
-      throw error;
-    }
-  }
-
-  return path;
-}
-
 export default function defaultResolver(
   path: Config.Path,
   options: ResolverOptions,
@@ -58,12 +42,12 @@ export default function defaultResolver(
     paths: options.paths,
     preserveSymlinks: false,
     // @ts-ignore: https://github.com/DefinitelyTyped/DefinitelyTyped/pull/44137
-    realpathSync: tolerantRealpath,
+    realpathSync,
   });
 
   // Dereference symlinks to ensure we don't create a separate
   // module instance depending on how it was referenced.
-  return tolerantRealpath(result);
+  return realpathSync(result);
 }
 
 export function clearDefaultResolverCache(): void {
@@ -105,6 +89,23 @@ function statSyncCached(path: string): IPathType {
   return IPathType.OTHER;
 }
 
+function tolerantRealpath(path: Config.Path): Config.Path {
+  let result: Config.Path | undefined = undefined;
+  try {
+    result = realpath(path);
+  } catch (error) {
+    if (error.code !== 'ENOENT') {
+      throw error;
+    }
+  }
+
+  if (!result) {
+    result = path;
+  }
+
+  return result;
+}
+
 /*
  * helper functions
  */
@@ -115,3 +116,7 @@ function isFile(file: Config.Path): boolean {
 function isDirectory(dir: Config.Path): boolean {
   return statSyncCached(dir) === IPathType.DIRECTORY;
 }
+
+function realpathSync(file: Config.Path): Config.Path {
+  return tolerantRealpath(file);
+}