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Note to self: Grails integration tests fail with static delcaration before constraints

Ran into this today and it was semi-tough to hunt down so I figured I'd post it since lord knows I'll forget this sometime in the near future.

If you have a class as follows:

class User {
  String firstName
  String lastName

  static constraints = {
  }
}

And an integration test like so:

import grails.test.*

class UserIntegrationTests extends GrailsUnitTestCase {
  void testSave() {
    def user = new User(firstName:'Matt', lastName:'Woodward')
    assertNotNull user.save()
  }
}

You may find Grails throwing this error when you run your integration tests:

No signature of method User.save() is applicable for argument types:() values:[]

Bit of a weird error but from what I can tell, the integration tests don't like the way the scaffolding formats that constraints block. I reformatted without the line break at the tests pass, and now even when I put things back the way they were, the tests pass.

Hope that helps someone else's head and the nearest wall if you're starting to dig deeper into Grails.

Comments

Matthew Woodward said…
When I first started writing this post I thought the static declaration was what was causing the issue, hence the title. Through further experimentation while I was working through this, it doesn't seem to matter that it's static, it just blows up with the default code that's spit out by the scaffolding. Sorry I didn't update the title to make that more clear.
graemerocher said…
If its a unit test (inside test/unit) it will fail with this error, if its an integration test (inside test/integration) it should not. Unit tests require you to use the mocking API (like mockDomain)
Matthew Woodward said…
Thanks Graeme--could have sworn it was my integration test that was failing yesterday, but I did a quick test this morning and the integration test does work OK. Not sure what state things were in with my other app that led me down this path.

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