Question

I am developing an application in play and in my selenium tests I use several tags for repetitive tasks. Two tags are:

app/views/tags/loginAs.html

*{ Tag for running selenium tests when being logged in }*

#{if !_keepData}
#{braindumpFixture delete:'all', load:'users.yml' /}
#{/if}

#{selenium}
 ... some selenium code to log into the application
#{/selenium}

app/views/tags/braindumpFixture.html

%{
if(_delete == 'all') {
play.test.Fixtures.deleteAll()
} else if(_delete) {
play.test.Fixtures.delete(_delete)
}
}%

%{
if(_load) {
play.test.Fixtures.load(_load)
}
// finally make sure the index is correctly updated.
new application.jobs.CompleteReindexJob().doJob();
}%

These work without a problem in Play 1.1. After switching to play 1.2.2, I get the following exception when running a selenium test that uses loginAs:

test/selenium/AddCard.test.html

*{ Tests adding a simple card }*

#{loginAs login:'[e-mail]', password:'foobar' /}

#{selenium}
open('@{Application.index()}')
... more selenium stuff here
#{/selenium}

The exception being:

play.exceptions.TemplateExecutionException: Cannot get property 'data' on null object
    at play.templates.BaseTemplate.throwException(BaseTemplate.java:84)
    at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:252)
    at play.templates.GroovyTemplate$ExecutableTemplate.invokeTag(GroovyTemplate.java:374)
    at /test/selenium/AddCard.test.html.(line:3)
    at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:229)
    at play.templates.Template.render(Template.java:26)
    at play.templates.GroovyTemplate.render(GroovyTemplate.java:184)
    at controllers.TestRunner.run(TestRunner.java:107)
    at play.mvc.ActionInvoker.invokeWithContinuation(ActionInvoker.java:543)
    at play.mvc.ActionInvoker.invoke(ActionInvoker.java:499)
    at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:475)
    at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:470)
    at play.mvc.ActionInvoker.invoke(ActionInvoker.java:158)
    at Invocation.HTTP Request(Play!)
Caused by: java.lang.NullPointerException: Cannot get property 'data' on null object
    at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:229)
    ... 12 more

When I remove the #{if !_keepData} around the call to braindumpFixture I get an EmptyStackException:

play.exceptions.TemplateExecutionException
    at play.templates.BaseTemplate.throwException(BaseTemplate.java:84)
    at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:252)
    at play.templates.Template.render(Template.java:26)
    at play.templates.GroovyTemplate.render(GroovyTemplate.java:184)
    at controllers.TestRunner.run(TestRunner.java:107)
    at play.mvc.ActionInvoker.invokeWithContinuation(ActionInvoker.java:543)
    at play.mvc.ActionInvoker.invoke(ActionInvoker.java:499)
    at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:475)
    at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:470)
    at play.mvc.ActionInvoker.invoke(ActionInvoker.java:158)
    at Invocation.HTTP Request(Play!)
Caused by: java.util.EmptyStackException
    at java.util.Stack.peek(Stack.java:85)
    at java.util.Stack.pop(Stack.java:67)
    at play.templates.TagContext.exitTag(TagContext.java:31)
    at play.templates.GroovyTemplate$ExecutableTemplate.invokeTag(GroovyTemplate.java:380)
    at /test/selenium/AddCard.test.html.(line:3)
    at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:229)
    ... 9 more

I wonder if something fundamentally changed with tags in Play 1.2 and I just overlooked it in the documentation or if this might be a bug. Any ideas on solving this riddle are welcome.

Answer 1

I am not aware that anything should have changed to stop this from working, so would expect this is a bug.