1 files changed, 13 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_dependency_resolver_vendor_set.rb b/test/rubygems/test_gem_dependency_resolver_vendor_set.rb
index 44b7413865..b925ff3f47 100644
--- a/test/rubygems/test_gem_dependency_resolver_vendor_set.rb
+++ b/test/rubygems/test_gem_dependency_resolver_vendor_set.rb
@@ -19,6 +19,19 @@ class TestGemDependencyResolverVendorSet < Gem::TestCase
     assert_equal "#{name}-#{version}", spec.full_name
   end
 
+  def test_add_vendor_gem_missing
+    name, version, directory = vendor_gem
+
+    FileUtils.rm_r directory
+
+    e = assert_raises Gem::GemNotFoundException do
+      @set.add_vendor_gem name, directory
+    end
+
+    assert_equal "unable to find #{directory}/#{name}.gemspec for gem #{name}",
+                 e.message
+  end
+
   def test_find_all
     name, version, directory = vendor_gem