println it.buildscript.classLoader.loadClass("${pluginBuilder.packageName}.TestSettingsPlugin").name
            }
        """

        when:
        executer.usingInitScript(initScript)
        succeeds 'help'

        then:
        outputContains("${pluginBuilder.packageName}.TestSettingsPlugin")

        where:
        settingScriptExtension | use

                    $impl
                }
            }
        """)
        this
    }

    PluginBuilder addSettingsPlugin(String impl, String id = "test-settings-plugin", String className = "TestSettingsPlugin") {
        addPluginSource(id, className, """
            ${packageName ? "package $packageName" : ""}

            class $className implements $Plugin.name<$Settings.name> {