If else statement in Spock test framework - testing

Question

I am trying to write a test code coverage for the below scanner method i have in groovy. I am using Spock test Framework to write my test case.
I am having issues trying to write the case for the if else part. It complains that i am still missing invocations for
1 * script.sh(N_COMMAND)
1 * script.sh(Node2_COMMAND + b + XYZ_NODE_COMMAND)
And
!PROJECT_TYPE.equals('nodejs')
1 * script.sh(a + b + XYZ_GRADLE_COMMAND)
I am new to Spock. Any help is appreciated.
Groovy Code:
void scanner() {
if (obj.projectType.equals("nodejs")){
script.sh N_COMMAND
script.sh Node2_COMMAND + b + XYZ_NODE_COMMAND
} else{
script.sh a + b + XYZ_GRADLE_COMMAND
}
script.sh a + b + c
}
Spock test framework code:
def 'should scanner'() {
given:
config.projectType >> PROJECT_TYPE
when:
scanner()
then:
PROJECT_TYPE.equals('nodejs')
1 * script.sh(N_COMMAND)
1 * script.sh(Node2_COMMAND + b + XYZ_NODE_COMMAND)
then:
!PROJECT_TYPE.equals('nodejs')
1 * script.sh(a + b + XYZ_GRADLE_COMMAND)
then:
1 * script.sh(a + b + c)
where:
PROJECT_TYPE << ['nodejs', 'java']
}