Address comments + add tests

src/browser/atom-application.coffee

@@ -522,9 +522,8 @@ class AtomApplication
     new AtomWindow({bootstrapScript, @resourcePath, exitWhenDone, isSpec, specDirectory, devMode})
 
   locationForPathToOpen: (pathToOpen) ->
-    {protocol} = url.parse(pathToOpen)
-    return {pathToOpen} if protocol?
     return {pathToOpen} unless pathToOpen
+    return {pathToOpen} if url.parse(pathToOpen).protocol?
     return {pathToOpen} if fs.existsSync(pathToOpen)
 
     pathToOpen = pathToOpen.replace(/[:\s]+$/, '')

src/default-directory-provider.coffee

@@ -24,9 +24,9 @@ class DefaultDirectoryProvider
 
     # TODO: Stop normalizing the path in pathwatcher's Directory.
     directory = new Directory(directoryPath)
-    if (url.parse(directoryPath).protocol)
+    if url.parse(directoryPath).protocol
       directory.path = directoryPath
-      if (fs.isCaseInsensitive())
+      if fs.isCaseInsensitive()
         directory.lowerCasePath = directoryPath.toLowerCase()
     directory