1 files changed, 20 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_installer.rb b/test/rubygems/test_gem_installer.rb
index 882981d344..dd049214fb 100644
--- a/test/rubygems/test_gem_installer.rb
+++ b/test/rubygems/test_gem_installer.rb
@@ -1448,6 +1448,26 @@ gem 'other', version
     end
   end
 
+  def test_pre_install_checks_malicious_name
+    spec = util_spec '../malicious', '1'
+    def spec.full_name # so the spec is buildable
+      "malicious-1"
+    end
+    def spec.validate; end
+
+    util_build_gem spec
+
+    gem = File.join(@gemhome, 'cache', spec.file_name)
+
+    use_ui @ui do
+      @installer = Gem::Installer.at gem
+      e = assert_raises Gem::InstallError do
+        @installer.pre_install_checks
+      end
+      assert_equal '#<Gem::Specification name=../malicious version=1> has an invalid name', e.message
+    end
+  end
+
   def test_shebang
     util_make_exec @spec, "#!/usr/bin/ruby"