1 files changed, 25 insertions, 0 deletions
diff --git a/spec/install/gemfile_spec.rb b/spec/install/gemfile_spec.rb
index 267a7f55db..4ebd5f4895 100644
--- a/spec/install/gemfile_spec.rb
+++ b/spec/install/gemfile_spec.rb
@@ -41,4 +41,29 @@ describe "bundle install" do
     end
   end
 
+  context "with future features" do
+    context "when source is used with a block" do
+      it "reports that sources with a block is not supported" do
+        gemfile <<-G
+          source 'http://rubygems.example.org' do
+            gem 'rack'
+          end
+        G
+
+        bundle :install
+        expect(out).to match(/A block was passed to `source`/)
+      end
+    end
+
+    context "when source is used without a block" do
+      it "prints no warnings" do
+        gemfile <<-G
+          source 'http://rubygems.example.org'
+        G
+
+        bundle :install
+        expect(out).not_to match(/A block was passed to `source`/)
+      end
+    end
+  end
 end