Test class

package com.company.everest

import grails.test.*
import org.codehaus.groovy.grails.plugins.web.taglib.FormTagLib
import org.codehaus.groovy.grails.commons.ApplicationAttributes
import groovy.mock.interceptor.StubFor
import org.springframework.context.MessageSource


class CompanyCustomTagLibTests extends TagLibUnitTestCase {

    def messageSourceStubber
    def originalFormTagLib

    protected void setUp() {
        super.setUp()

        mockTagLib(FormTagLib)
        originalFormTagLib = new FormTagLib()
        mockGrailsAttributesForTagLib(originalFormTagLib)
        tagLib.metaClass.getG = { return originalFormTagLib }
        tagLib.metaClass.g = originalFormTagLib


        registerMetaClass(String)
        String.class.metaClass.encodeAsHTML = {
            return delegate; // return the string itself
        }



        // mock a spring-MessageSource with a message getMessage()
        messageSourceStubber = new StubFor(MessageSource.class)
        messageSourceStubber.demand.getMessage(1..1) {code, args, locale ->       return code     }
    }





    private void mockGrailsAttributesForTagLib(def theLib) {
        // provide grailsAttributes to the tagLib
        theLib.metaClass.getGrailsAttributes = { getGrailsAttributesStub() }
    }


    private ApplicationAttributes getGrailsAttributesStub() {
        def applicationContextStubber = new StubFor(org.springframework.context.ApplicationContext.class)
        applicationContextStubber.demand.getBean() {beanName -> getBean(beanName) }

        def grailsAttributesStubber = new StubFor(ApplicationAttributes.class)
        grailsAttributesStubber.demand.getApplicationContext() {       applicationContextStubber.proxyInstance()     }
        return (ApplicationAttributes) grailsAttributesStubber.proxyInstance()
    }


    private getBean(String beanName)
    {
        assertEquals "messageSource", beanName
        return messageSourceStubber.proxyInstance()
    }







    void testClientSpecificQueuesSelectBox(){
        def taskService = mockFor(TaskService)

        taskService.demand.getClientSpecificQueues(){clientName->
            return [new TaskQueues(name: 'CM Referral'),
                    new TaskQueues(name: 'DM Referral'),
                    new TaskQueues(name: 'Authorization Requests')]
        }


        tagLib.taskService = taskService.createMock()

       def output = tagLib.clientSpecificQueues().toString()


//        assert output.contains("input type")
//        assert output.contains("td")

    }




}