Unable to mock external shared library methods

[jevgarcia22]

code under test: lint.groovy

def lintYamlFiles() {
    script {
        def detect = new detect()
        def changedFiles = detect.changedFiles()
        sh  '''
            #!/bin/bash -x
        '''
    }
}

I'm trying to mock execution of detect.changedFiles() like this:

class lintTest extends JenkinsPipelineSpecification   {
    def lint = null

    def setup() {
        lint = loadPipelineScriptForTest("../../src/org/xy/carbon/lint.groovy")
        explicitlyMockPipelineVariable('detect')             
    }

    def "test 01: successfully invoke "()   {
        setup:   getPipelineMock('detect.changedFiles').call('script') >> "test"
        when:    lint.lintYamlFiles()
        then:     1 * getPipelineMock('detect.changedFiles')(_)

have also tried: getPipelineMock('detect.changedFiles').call() >> "test"

executions fail with:

[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 3.914 s <<< FAILURE! - in lintTest
[ERROR] lintTest.test 01: successfully invoke   Time elapsed: 0.339 s  <<< ERROR!
groovy.lang.MissingMethodException:
No signature of method: org.xy.carbon.detect.script() is applicable for argument types: (org.xy.carbon.detect$_changedFiles_closure1) values: [org.xy.carbon.detect$_changedFiles_closure1@6917bb4]
Possible solutions: print(java.lang.Object), split(groovy.lang.Closure), print(java.lang.Object), print(java.io.PrintWriter), wait(), grep()
    at org.xy.carbon.detect.changedFiles(detect.groovy:9)
    at org.xy.carbon.lint.lintYamlFiles_closure1(lint.groovy:8)
    at org.xy.carbon.lint.lintYamlFiles_closure1(lint.groovy)
    at com.homeaway.devtools.jenkins.testing.JenkinsPipelineSpecification.addPipelineMocksToObjects_closure1$_closure14(JenkinsPipelineSpecification.groovy:682)
    at org.xy.carbon.lint.lintYamlFiles(lint.groovy:5)
    at lintTest.test 01: successfully invoke (lintTest.groovy:38)

Is it possible to mock interactions with methods in external libraries?

[awittha]

Is detect a variable in a Shared Library that will be present on your Jenkins master?

I think the disconnect here is .call("script") - try plain old

getPipelineMock('detect.changedFiles')('script') >> "test"

It's unfortunate, but the Groovy syntactic sugar of ".call() is implicitly the same as just attaching those parentheses to an object" doesn't work every time with the shenanigans we had to go through to get implicit, automatic mocking working in jenkins-spock.