groovy - Testing action with spock in Grails -

i have action test when content-type application/json

my action looks this:

def save () {   request.withformat {      json {         def colorinstance = new color(params.colors)         render "${colorinstance.name}"      }       html {        //do html stuff      }   } 

i've got following doesn't seem work:

def "js test" () {     when:     controller.save()     request.contenttype = "application/json"     request.content = '{"colors": {"name": "red"} }'      then:     response.contentasstring == "red" } 

i believe problem in way i'm sending json controller in test. correct way?

error is:

response.contentasstring == "red" |        |               | |        null            false 

if modify controller be:

     json {         def colorinstance = new color(params.colors)         render "${params.colors}"      } 

then error same:

response.contentasstring == "red" |        |               | |        null            false 

so suspect params.colors never reached controller...?

this works me:

note:- used given set parameters. looks setting json request binds params in controller.

def save() {         request.withformat {             json {                 def colorinstance = new color(params.colors)                 render "${colorinstance.colorname}"             }              html {                 //do html stuff             }         }     } 

//domain color

class color {     string colorname     boolean isprimarycolor } 

//spock test

def "json test" () {         given:             request.contenttype = "application/json"             request.json = '{colors: {colorname: "red", isprimarycolor: true} }'         when:             controller.save()         then:             assert response.status == 200             assert response.contentasstring == "red"     }