Testing grails taglib - testing

Question

Grails 1.1.
My custom tag:
class MyTagLib {
static namespace 'ct'
def textField = {attrs ->
def bean = attrs.remove('bean')
def field = attrs.remove('field')
attrs.name = field
out << render(template:"/templates/textField", model:[
required: !bean.constraints[field].nullable,
display : bean["${bean.trainingExperience.type}"][field],
theTag : g.textField(name : field, value : bean[field]),
value : bean[field]
])
}
Just about all of the taglib unit tests i see just
AssertEquals "Some String", taglib.out.toString()
Is it possible to test that correct template is being rendered with the correct values in the model?
MyTagLibTests
public class CareertracTagLibTests extends TagLibUnitTestCase{
protected void setUp() {
super.setUp()
mockTagLib(FormTagLib)
mockTagLib(RenderTagLib)
def g = new FormTagLib() // interpret "g" namespace as instances of FormTagLib
tagLib.metaClass.g = g
String.metaClass.encodeAsHTML = {org.codehaus.groovy.grails.plugins.codecs.HTMLCodec.encode(it)}
}
void TestTextField() {
tagLib.textField([bean : mockBean, field : 'viewField'])
def x = new RenderTagLib().render(template:"/templates/textField",
model:[required:false,
display:"view",
// Snip
])
assertEquals tagLib.out, x.out // Or something like this
}
}
}

Answer 1

With TagLibUnitTestCase you can use renderArgs to test calls to the render method the same way that you can in ControllerUnitTestCase. The renderArgs property is simply a map that stores the arguments of the last call to the render dynamic method. So, in your example you would want something like this:
assertEquals "/templates/textField", renderArgs.template
assertFalse renderArgs.model.required
and so on.