Added backward compatibility for BUNDLE_* config keys

Closes #3557

1 files changed, 18 insertions, 0 deletions

diff --git a/spec/bundler/settings_spec.rb b/spec/bundler/settings_spec.rb
index 56ee87da..a6c6d42e 100644
--- a/spec/bundler/settings_spec.rb
+++ b/spec/bundler/settings_spec.rb
@@ -48,6 +48,24 @@ describe Bundler::Settings do
       settings["mirror.https://rubygems.org"] = "http://rubygems-mirror.org"
       expect(settings.gem_mirrors).to eq(URI("https://rubygems.org/") => URI("http://rubygems-mirror.org/"))
     end
+  end
+
+  describe "BUNDLE_ keys format" do
+    let(:settings) { described_class.new(bundled_app('.bundle')) }
+
+    it "converts older keys without double dashes" do
+      config("BUNDLE_MY__PERSONAL.RACK" => "~/Work/git/rack")
+      expect(settings["my.personal.rack"]).to eq("~/Work/git/rack")
+    end
 
+    it "converts older keys without trailing slashes and double dashes" do
+      config("BUNDLE_MIRROR__HTTPS://RUBYGEMS.ORG" => "http://rubygems-mirror.org")
+      expect(settings["mirror.https://rubygems.org/"]).to eq("http://rubygems-mirror.org")
+    end
+
+    it "reads newer keys format properly" do
+      config("BUNDLE_MIRROR__HTTPS://RUBYGEMS__ORG/" => "http://rubygems-mirror.org")
+      expect(settings["mirror.https://rubygems.org/"]).to eq("http://rubygems-mirror.org")
+    end
   end
 end