sap-jenkins-library/test/groovy/DockerExecuteTest.groovy

import org.junit.Before
import org.junit.Rule
import org.junit.Test
import org.junit.rules.RuleChain

import com.lesfurets.jenkins.unit.BasePipelineTest

import util.JenkinsLoggingRule
import util.Rules
import util.JenkinsStepRule
import util.JenkinsEnvironmentRule

import static org.junit.Assert.assertEquals
import static org.junit.Assert.assertTrue
import static org.junit.Assert.assertFalse

class DockerExecuteTest extends BasePipelineTest {
    private DockerMock docker
    
    private JenkinsLoggingRule jlr = new JenkinsLoggingRule(this)
    private JenkinsStepRule jsr = new JenkinsStepRule(this)
    private JenkinsEnvironmentRule jer = new JenkinsEnvironmentRule(this)

    @Rule
    public RuleChain ruleChain = Rules
        .getCommonRules(this)
        .around(jlr)
        .around(jsr)
    
    int whichDockerReturnValue = 0
    def bodyExecuted

    @Before
    void init() {
        bodyExecuted = false
        docker = new DockerMock()
        binding.setVariable('docker', docker)
        binding.setVariable('Jenkins', [instance: [pluginManager: [plugins: [new PluginMock()]]]])

        helper.registerAllowedMethod('sh', [Map.class], {return whichDockerReturnValue})
    }

    @Test
    void testExecuteInsideDocker() throws Exception {

        jsr.step.call(script: [commonPipelineEnvironment: jer.env],
                      dockerImage: 'maven:3.5-jdk-8-alpine') {
            bodyExecuted = true
        }

        assertEquals('maven:3.5-jdk-8-alpine', docker.getImageName())
        assertTrue(docker.isImagePulled())
        assertEquals(' --env http_proxy --env https_proxy --env no_proxy --env HTTP_PROXY --env HTTPS_PROXY --env NO_PROXY', docker.getParameters())
        assertTrue(bodyExecuted)
    }

    @Test
    void testExecuteInsideDockerWithParameters() throws Exception {

        jsr.step.call(script: [commonPipelineEnvironment: jer.env],
                      dockerImage: 'maven:3.5-jdk-8-alpine',
                      dockerOptions: '-it',
                      dockerVolumeBind: ['my_vol': '/my_vol'],
                      dockerEnvVars: ['http_proxy': 'http://proxy:8000']) {
            bodyExecuted = true
        }
        assertTrue(docker.getParameters().contains(' --env https_proxy '))
        assertTrue(docker.getParameters().contains(' --env http_proxy=http://proxy:8000'))
        assertTrue(docker.getParameters().contains(' -it'))
        assertTrue(docker.getParameters().contains(' --volume my_vol:/my_vol'))
        assertTrue(bodyExecuted)
    }

    @Test
    void testDockerNotInstalledResultsInLocalExecution() throws Exception {

        whichDockerReturnValue = 1

        jsr.step.call(script: [commonPipelineEnvironment: jer.env],
                      dockerImage: 'maven:3.5-jdk-8-alpine',
                      dockerOptions: '-it',
                      dockerVolumeBind: ['my_vol': '/my_vol'],
                      dockerEnvVars: ['http_proxy': 'http://proxy:8000']) {
            bodyExecuted = true
        }

        assertTrue(jlr.log.contains('No docker environment found'))
        assertTrue(jlr.log.contains('Running on local environment'))
        assertTrue(bodyExecuted)
        assertFalse(docker.isImagePulled())
    }

    private class DockerMock {
        private String imageName
        private boolean imagePulled = false
        private String parameters

        DockerMock image(String imageName) {
            this.imageName = imageName
            return this
        }

        void pull() {
            imagePulled = true
        }

        void inside(String parameters, body) {
            this.parameters = parameters
            body()
        }

        String getImageName() {
            return imageName
        }

        boolean isImagePulled() {
            return imagePulled
        }

        String getParameters() {
            return parameters
        }
    }

    private class PluginMock {
        def getShortName() {
            return 'docker-workflow'
        }
        boolean isActive() {
            return true
        }
    }
}