Merge pull request #7394 from rubygems/deivid-rodriguez/test-that-regular-gems-cant-shadow-default-gems

Test that regular gems don't shadow default gems

(cherry picked from commit c7b3628)

Author: deivid-rodriguez

test/rubygems/test_require.rb

@@ -489,6 +489,17 @@ def test_default_gem_and_normal_gem
     assert_equal %w[default-3.0], loaded_spec_names
   end
 
+  def test_normal_gem_does_not_shadow_default_gem
+    default_gem_spec = new_default_spec("foo", "2.0", nil, "foo.rb")
+    install_default_gems(default_gem_spec)
+
+    normal_gem_spec = util_spec("fake-foo", "3.0", nil, "lib/foo.rb")
+    install_specs(normal_gem_spec)
+
+    assert_require "foo"
+    assert_equal %w[foo-2.0], loaded_spec_names
+  end
+
   def test_normal_gems_with_overridden_load_error_message
     normal_gem_spec = util_spec("normal", "3.0", nil, "lib/normal/gem.rb")