1 files changed, 54 insertions, 0 deletions
diff --git a/test/rubygems/test_gem.rb b/test/rubygems/test_gem.rb
index ec7f7299ec..33d4b25e0d 100644
--- a/test/rubygems/test_gem.rb
+++ b/test/rubygems/test_gem.rb
@@ -1245,6 +1245,60 @@ class TestGem < Gem::TestCase
     end
   end
 
+  def test_use_gemdeps
+    rubygems_gemdeps, ENV['RUBYGEMS_GEMDEPS'] = ENV['RUBYGEMS_GEMDEPS'], nil
+
+    spec = util_spec 'a', 1
+
+    refute spec.activated?
+
+    open 'Gemfile', 'w' do |io|
+      io.write 'gem "a"'
+    end
+
+    Gem.use_gemdeps
+
+    assert spec.activated?
+  ensure
+    ENV['RUBYGEMS_GEMDEPS'] = rubygems_gemdeps
+  end
+
+  def test_use_gemdeps_disabled
+    rubygems_gemdeps, ENV['RUBYGEMS_GEMDEPS'] = ENV['RUBYGEMS_GEMDEPS'], ''
+
+    spec = util_spec 'a', 1
+
+    refute spec.activated?
+
+    open 'Gemfile', 'w' do |io|
+      io.write 'gem "a"'
+    end
+
+    Gem.use_gemdeps
+
+    refute spec.activated?
+  ensure
+    ENV['RUBYGEMS_GEMDEPS'] = rubygems_gemdeps
+  end
+
+  def test_use_gemdeps_specific
+    rubygems_gemdeps, ENV['RUBYGEMS_GEMDEPS'] = ENV['RUBYGEMS_GEMDEPS'], 'x'
+
+    spec = util_spec 'a', 1
+
+    refute spec.activated?
+
+    open 'x', 'w' do |io|
+      io.write 'gem "a"'
+    end
+
+    Gem.use_gemdeps
+
+    assert spec.activated?
+  ensure
+    ENV['RUBYGEMS_GEMDEPS'] = rubygems_gemdeps
+  end
+
   def with_plugin(path)
     test_plugin_path = File.expand_path("test/rubygems/plugin/#{path}",
                                         @@project_dir)