Merge pull request #568 from keegangroth/kubernetes-true

Allow declaration of kubernetes agent with no config

Author: nre-ableton

src/main/groovy/com/lesfurets/jenkins/unit/declarative/AgentDeclaration.groovy

@@ -55,6 +55,10 @@ class AgentDeclaration extends GenericPipelineDeclaration {
         this.docker = createComponent(DockerAgentDeclaration, closure)
     }
 
+    def kubernetes(boolean _) {
+        kubernetes([:])
+    }
+
     def kubernetes(Object kubernetesAgent) {
         this.@kubernetes = kubernetesAgent as KubernetesAgentDeclaration
     }

src/test/groovy/com/lesfurets/jenkins/unit/declarative/TestDeclarativePipeline.groovy

@@ -639,6 +639,13 @@ class TestDeclarativePipeline extends DeclarativePipelineTest {
         assertJobStatusSuccess()
     }
 
+    @Test void should_kubernetes_default_agent() throws Exception {
+        runScript('Kubernetes_Default_Jenkinsfile')
+        printCallStack()
+        assertCallStack().contains('Executing on agent [kubernetes')
+        assertJobStatusSuccess()
+    }
+
     @Test void should_credentials() throws Exception {
         addCredential('my-prefined-secret-text', 'something_secret')
         runScript('Credentials_Jenkinsfile')

src/test/jenkins/jenkinsfiles/Kubernetes_Default_Jenkinsfile

@@ -0,0 +1,11 @@
+pipeline {
+    agent { kubernetes true }
+    stages {
+        stage('Example Test') {
+            steps {
+                echo 'Hello, JDK'
+                sh 'java -version'
+            }
+        }
+    }
+}