sap-jenkins-library/test/groovy/util/JenkinsShellCallRule.groovy

package util

import com.lesfurets.jenkins.unit.BasePipelineTest
import org.junit.rules.TestRule
import org.junit.runner.Description
import org.junit.runners.model.Statement

class JenkinsShellCallRule implements TestRule {

    final BasePipelineTest testInstance

    String shell = ""

    JenkinsShellCallRule(BasePipelineTest testInstance) {
        this.testInstance = testInstance
    }

    @Override
    Statement apply(Statement base, Description description) {
        return statement(base)
    }

    private Statement statement(final Statement base) {
        return new Statement() {
            @Override
            void evaluate() throws Throwable {

                testInstance.helper.registerAllowedMethod("sh", [String.class], {
                    command -> 
					command = command.replaceAll(/\s+/," ").trim()
					     shell += "$command \n"
                })

                base.evaluate()
            }
        }
    }
}