1 files changed, 38 insertions, 0 deletions
diff --git a/railties/test/application/test_test.rb b/railties/test/application/test_test.rb
new file mode 100644
index 0000000000..ff6df93ebc
--- /dev/null
+++ b/railties/test/application/test_test.rb
@@ -0,0 +1,38 @@
+require 'isolation/abstract_unit'
+
+module ApplicationTests
+  class TestTest < Test::Unit::TestCase
+    include ActiveSupport::Testing::Isolation
+
+    def setup
+      build_app
+      boot_rails
+    end
+
+    test "truth" do
+      app_file 'test/unit/foo_test.rb', <<-RUBY
+        require 'test_helper'
+
+        class FooTest < ActiveSupport::TestCase
+          def test_truth
+            assert true
+          end
+        end
+      RUBY
+
+      run_test 'unit/foo_test.rb'
+    end
+
+    private
+      def run_test(name)
+        result = ruby '-Itest', "#{app_path}/test/#{name}"
+        assert_equal 0, $?.to_i, result
+      end
+
+      def ruby(*args)
+        Dir.chdir(app_path) do
+          `RUBYLIB='#{$:.join(':')}' #{Gem.ruby} #{args.join(' ')}`
+        end
+      end
+  end
+end