How to mock values in Config.groovy in Grails for unit testing

Question

I want to write some test cases where I have to mock some properties of the config file.

Below shown is the actual code

if (password.length() < grailsApplication.config.user.password.min.length) {
    return false
}

I want to mock grailsApplication.config.user.password.min.length In my config file, user.password.min.length has been set as 6

I tried to mock in the following ways:

1. mockConfig = new ConfigObject()
mockConfig.user.password.min.length = 6

2. mockConfig("user.password.min.length")

3. mockConfig(user.password.min.length)
4. mockConfig(mockConfig.user.password.min.length)

But none of this is working. My code is throwing NullPointerException sometimes. Could someone please advise the correct way to mock the config file?

Answer 1

Following is how I mock my config properties in Service spec.

@TestFor(MyService)
class MyServiceSpec extends Specification {

void "Test case for somemethod" () {
    given:
    grailsApplication.config.my.prop= 'some-prop-value'

    when:
    def result = service.getSomething(keyword)

    then:
    result.label.every {
        it.toLowerCase().contains(keyword)
    }

    where:
    keyword << ["dub", "sing"]
}

Note: my.prop is the property I'm using inside getSomething(string) method.