fix tests failing if the current dir is something else than "hub"

Some tests relied on the current working directory being named "hub".
This change makes it possible for tests to stub out the name of the
current directory.

References 9801b465

lib/hub/commands.rb

@@ -225,7 +225,7 @@ module Hub
     # > git remote add origin git@github.com:USER/REPO.git
     def init(args)
       if args.delete('-g')
-        url = github_url(:private => true, :repo => File.basename(Dir.pwd))
+        url = github_url(:private => true, :repo => current_dirname)
         args.after "git remote add origin #{url}"
       end
     end

lib/hub/context.rb

@@ -34,7 +34,7 @@ module Hub
     end
 
     def repo_name
-      REMOTES[default_remote][:repo] || File.basename(Dir.pwd)
+      REMOTES[default_remote][:repo] || current_dirname
     end
 
     # Either returns the GitHub user as set by git-config(1) or aborts
@@ -138,5 +138,11 @@ module Hub
         url % [user, repo]
       end
     end
+
+    DIRNAME = File.basename(Dir.pwd)
+
+    def current_dirname
+      DIRNAME
+    end
   end
 end

test/hub_test.rb

@@ -16,6 +16,7 @@ class HubTest < Test::Unit::TestCase
 
   def setup
     COMMANDS.replace %w[open groff]
+    Hub::Context::DIRNAME.replace 'hub'
 
     @git = Hub::Context::GIT_CONFIG.replace(Hash.new { |h, k|
       raise ArgumentError, "`git #{k}` not stubbed"
@@ -356,10 +357,9 @@ class HubTest < Test::Unit::TestCase
   end
 
   def test_init
-    dirname = File.basename(Dir.pwd)
     h = Hub("init -g")
     assert_equal "git init", h.command
-    assert_equal "git remote add origin git@github.com:tpw/#{dirname}.git", h.after
+    assert_equal "git remote add origin git@github.com:tpw/hub.git", h.after
   end
 
   def test_init_no_login