Add test files to engine's gemspec

railties/lib/rails/generators/rails/plugin_new/templates/%name%.gemspec

@@ -5,5 +5,8 @@
   s.summary = "Insert <%= camelized %> summary."
   s.description = "Insert <%= camelized %> description."
   s.files = Dir["{app,config,lib}/**/*"] + ["MIT-LICENSE", "Rakefile", "README.rdoc"]
+<% unless options.skip_test_unit? -%>
+  s.test_files = Dir["test/**/*"]
+<% end -%>
   s.version = "0.0.1"
 end

railties/test/generators/plugin_new_generator_test.rb

@@ -173,6 +173,7 @@ def test_creating_gemspec
     run_generator
     assert_file "bukkits.gemspec", /s.name = "bukkits"/
     assert_file "bukkits.gemspec", /s.files = Dir\["\{app,config,lib\}\/\*\*\/\*"\]/
+    assert_file "bukkits.gemspec", /s.test_files = Dir\["test\/\*\*\/\*"\]/
     assert_file "bukkits.gemspec", /s.version = "0.0.1"/
   end
 
@@ -195,6 +196,12 @@ def test_creating_dummy_without_tests_but_with_dummy_path
     assert_no_file "test"
   end
 
+  def test_skipping_test_unit
+    run_generator [destination_root, "--skip-test-unit"]
+    assert_no_file "test"
+    assert_no_match(/s.test_files = Dir\["test\/\*\*\/\*"\]/, File.read(File.join(destination_root, "bukkits.gemspec")))
+  end
+
   def test_skipping_gemspec
     run_generator [destination_root, "--skip-gemspec"]
     assert_no_file "bukkits.gemspec"