better errors for Repo.new

lib/grit/errors.rb

@@ -1,4 +1,7 @@
 module Grit
   class InvalidGitRepositoryError < StandardError
   end
+
+  class NoSuchPathError < StandardError
+  end
 end

lib/grit/repo.rb

@@ -23,8 +23,10 @@ def initialize(path)
       elsif File.exist?(path) && path =~ /\.git$/
         self.path = path
         @bare = true
+      elsif File.exist?(path)
+        raise InvalidGitRepositoryError.new(path)
       else
-        raise InvalidGitRepositoryError.new(path) unless File.exist?(path)
+        raise NoSuchPathError.new(path)
       end
 
       self.git = Git.new(self.path)

test/test_repo.rb

@@ -9,7 +9,13 @@ def setup
 
   def test_new_should_raise_on_invalid_repo_location
     assert_raise(InvalidGitRepositoryError) do
-      Repo.new("")
+      Repo.new("/tmp")
+    end
+  end
+
+  def test_new_should_raise_on_non_existant_path
+    assert_raise(NoSuchPathError) do
+      Repo.new("/foobar")
     end
   end