1 files changed, 15 insertions, 0 deletions
diff --git a/railties/test/generators/generator_test.rb b/railties/test/generators/generator_test.rb
index 7871399dd7..8ef44a8dcb 100644
--- a/railties/test/generators/generator_test.rb
+++ b/railties/test/generators/generator_test.rb
@@ -80,6 +80,21 @@ module Rails
         }
         assert_equal gems.drop(2), generator.gemfile_entries
       end
+
+      def test_recommended_rails_versions
+        klass     = make_builder_class
+        generator = klass.start(['new', 'blah'])
+
+        specifier_for = -> v { generator.send(:rails_version_specifier, Gem::Version.new(v)) }
+
+        assert_equal '~> 4.1.13', specifier_for['4.1.13']
+        assert_equal ['>= 4.1.6.rc1', '< 4.2'], specifier_for['4.1.6.rc1']
+        assert_equal ['~> 4.1.7', '>= 4.1.7.1'], specifier_for['4.1.7.1']
+        assert_equal ['~> 4.1.7', '>= 4.1.7.1.2'], specifier_for['4.1.7.1.2']
+        assert_equal ['>= 4.1.7.1.rc2', '< 4.2'], specifier_for['4.1.7.1.rc2']
+        assert_equal ['>= 4.2.0.beta1', '< 4.3'], specifier_for['4.2.0.beta1']
+        assert_equal ['>= 5.0.0.beta1', '< 5.1'], specifier_for['5.0.0.beta1']
+      end
     end
   end
 end