Since current official documentation only covers unit testing for controllers and that it took me a while to to figure them out completely, I thought I would leave it here in case it helps someone else.

The reason for writing these tests was to validate some REST API endpoints implemented using Grails Controllers.

In theory it should be as simple as:

1. Return JSON in your model from your controller

def index() = {  
    [data: data as JSON]
}

1. Render the model attribute without encoding using the raw() method

<r:script>  
    var data = ${raw(data)};
</r:script>  

Unfortunately this does not work, at least when you are using the resources plugin. You know it does not work because all the quotes have

Recently I had to creat a Groovy script that copies some files from my plugin to the host application. The problem is I did not know how to reference those files inside my plugin.

If you have the same problem here is the solution:

String yourPluginDir = GrailsPluginUtils.pluginInfos.find { it.name == 'your-plugin-name' }.pluginDir  

I am writing this post to record all the things I have done in order to migrate an existing Grails 2.2.x app to 2.3.x.

The reasons for me to upgrade are:

• Project progress is at an early stage where is not very risky to do that. We also have a considerable amount of automatic tests. You have also need to take into consideration that the more major versions you skip, the harder it gets to migrate