How to mock variables from a groovy file

Question

I have a groovy file created under "vars" in a Jenkins-shared-lib.
Few variables are defined inside call().
I want to mock the variables in a groovy test file.

Variables are defined in sonarGradleProject.groovy in vars:

#!/usr/bin/env groovy

import static com.example.jenkins.Constants.* 

def call(Map params = [:]) {
    def sonarCredId = params.sonarCredentialId ?: SONAR_CREDENTIAL_ID_DEFAULT;
    def sonarUrl = params.sonarUrl ?: SONAR_URL;
    def profile = params.profile ?: 'example';

    withCredentials([string(credentialsId: sonarCredId, variable: 'SONAR_TOKEN')]) {
        sh "./gradlew --no-daemon jacocoTestReport sonarqube -P${profile} -Dsonar.host.url=${sonarUrl} -Dsonar.login=$SONAR_TOKEN -Dsonar.verbose=true"
    }
}

Test file looks like this:

import com.example.jenkins.testing.JenkinsPipelineSpecification

class SonarGradleProjectSpec extends JenkinsPipelineSpecification {
    def "expected minor value"() {
        setup:
            def sonarGradleProject = loadPipelineScriptForTest("vars/sonarGradleProject.groovy")
            explicitlyMockPipelineStep('withCredentials')
        when:
            def verType = sonarGradleProject(profile: 'foo')
        then:
            1 * getPipelineMock("sh")("./gradlew --no-daemon jacocoTestReport sonarqube -P${profile} -Dsonar.host.url=${sonarUrl} -Dsonar.login=$SONAR_TOKEN -Dsonar.verbose=true")
        expect:
            'foo' == profile
    }
}

On executing the test case, I get this error:

java.lang.IllegalStateException: There is no pipeline variable mock for [profile].
    1. Is the name correct?
    2. Is it a GlobalVariable extension point? If so, does the getName() method return [profile]?
    3. Is that variable normally defined by Jenkins? If so, you may need to define it by hand in your Spec.
    4. Does that variable come from a plugin? If so, is that plugin listed as a dependency in your pom.xml?
    5. If not, you may need to call explicitlyMockPipelineVariable("profile") during your test setup.

    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at com.example.jenkins.testing.JenkinsPipelineSpecification.addPipelineMocksToObjects_closure1$_closure15(JenkinsPipelineSpecification.groovy:755)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at SonarGradleProjectSpec.expected minor value(sonarGradleProjectSpec.groovy:12)
Caused by: groovy.lang.MissingPropertyException: No such property: (intercepted on instance [SonarGradleProjectSpec@3dfb1626] during test [SonarGradleProjectSpec@3dfb1626]) profile for class: SonarGradleProjectSpec
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at com.example.jenkins.testing.JenkinsPipelineSpecification.addPipelineMocksToObjects_closure1$_closure15(JenkinsPipelineSpecification.groovy:754)
    ... 3 more

I want to use the variables in test. How do I mock them?