tap: various improvements (#77)

* make `read_or_set_private_config` private
* add doc
* add test

1 files changed, 10 insertions, 0 deletions

diff --git a/Library/Homebrew/test/test_tap.rb b/Library/Homebrew/test/test_tap.rb
index 0b2671698..a6b81dc95 100644
--- a/Library/Homebrew/test/test_tap.rb
+++ b/Library/Homebrew/test/test_tap.rb
@@ -231,6 +231,16 @@ class TapTest < Homebrew::TestCase
     @tap.unpin
     refute_predicate @tap, :pinned?
   end
+
+  def test_config
+    setup_git_repo
+
+    assert_nil @tap.config["foo"]
+    @tap.config["foo"] = "bar"
+    assert_equal "bar", @tap.config["foo"]
+    @tap.config["foo"] = nil
+    assert_nil @tap.config["foo"]
+  end
 end
 
 class CoreTapTest < Homebrew::TestCase