Move integration tests from eirini

[#163823994]

Signed-off-by: Steffen Uhlig <[email protected]>

README.md

@@ -2,9 +2,12 @@
 
 This package contains all necessary code to run a Cloud Foundry (CF) app on Kubernetes. It is used by Eirini's [`k8s`](https://github.com/cloudfoundry-incubator/eirini/tree/master/k8s) package to run the app as Kubernetes `StatefulSet`.
 
-If no startup command was provided for a CF app, this package parses the `startup_command` from `staging_info.yml` (inside the CF app). It simply wraps the launcher (added via the `buildpackapplifecycle` submodule), which provides the environment setup and launch command for the the app. 
+If no startup command was provided for a CF app, this package parses the `startup_command` from `staging_info.yml` (inside the CF app). It simply wraps the launcher (added via the `buildpackapplifecycle` submodule), which provides the environment setup and launch command for the the app.
 
 The `launchcmd` is then provided together with [`cflinuxfs2`](https://github.com/cloudfoundry/cflinuxfs2) and [`launcher`](https://github.com/cloudfoundry/buildpackapplifecycle/tree/master/launcher) as `eirinifs.tar`, forming the root filesystem of the CF app. The [bits-service](https://github.com/cloudfoundry-incubator/bits-service) consumes the GitHub release of `eirinifs` when building the OCI image for the CF app (running in Kubernetes).
 
 Building and updating the release is handled in the [CI pipeline](https://flintstone.ci.cf-app.com/teams/eirini/pipelines/eirinifs). Use [`ci/set-pipeline`](ci/set-pipeline) to configure it.
 
+# Test
+
+Run `ginkgo` in the `launchcmd` directory.

ci/build-eirinifs.yml → ci/build-eirinifs/task.yml

@@ -14,5 +14,5 @@ outputs:
 - name: go/src/github.com/cloudfoundry-incubator/eirinifs/image/
 
 run:
-  path: eirinifs/ci/build-eirinifs.sh
+  path: eirinifs/ci/build-eirinifs/task.sh
 

ci/pipeline.yml

@@ -1,9 +1,20 @@
 jobs:
+- name: run-tests
+  plan:
+  - get: eirinifs
+    trigger: true
+  - get: launcher
+    trigger: true
+  - task: run-integration-tests
+    file: eirinifs/ci/run-integration-tests/task.yml
 - name: update-eirinifs
   plan:
   - get: eirinifs
+    trigger: true
+    passed: [ run-tests ]
   - get: launcher
     trigger: true
+    passed: [ run-tests ]
   - get: cflinuxfs2-image
     trigger: true
   - get: eirinifs-version
@@ -14,7 +25,7 @@ jobs:
       file: eirinifs-version/version
   - task: build eirinifs
     privileged: true
-    file: eirinifs/ci/build-eirinifs.yml
+    file: eirinifs/ci/build-eirinifs/task.yml
   - put: eirinifs-release
     params:
       name: eirinifs-version/version

ci/run-integration-tests/task.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -euo pipefail
+
+export GOPATH="$PWD"
+mkdir -p src/code.cloudfoundry.org
+cp -r eirinifs src/code.cloudfoundry.org/
+cd src/code.cloudfoundry.org/eirinifs
+ginkgo -v launchcmd

ci/run-integration-tests/task.yml

@@ -0,0 +1,14 @@
+---
+platform: linux
+
+image_resource:
+  type: docker-image
+  source:
+    repository: eirini/ci
+
+inputs:
+- name: eirinifs
+
+run:
+  path: eirinifs/ci/run-integration-tests/task.sh
+

launchcmd/launch_suite_test.go

@@ -0,0 +1,13 @@
+package main_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestLaunch(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Launch Suite")
+}

launchcmd/launch_test.go

@@ -0,0 +1,133 @@
+package main_test
+
+import (
+	"os/exec"
+	"time"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/onsi/gomega/gbytes"
+	"github.com/onsi/gomega/gexec"
+)
+
+var _ = Describe("Launch", func() {
+	var (
+		launchPath   string
+		session      *gexec.Session
+		err          error
+		envs         []string
+		mockLauncher string
+	)
+
+	Context("When launcher is provided", func() {
+
+		BeforeEach(func() {
+			envs = []string{"START_COMMAND=dummy"}
+			launchPath, err = gexec.Build("code.cloudfoundry.org/eirinifs/launchcmd")
+			Expect(err).ToNot(HaveOccurred())
+		})
+
+		JustBeforeEach(func() {
+			cmd := exec.Command(launchPath, mockLauncher) //#nosec
+			cmd.Env = envs
+			session, err = gexec.Start(cmd, GinkgoWriter, GinkgoWriter)
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		Context("Launcher args", func() {
+			BeforeEach(func() {
+				mockLauncher = "mock-launchers/verify-args.sh"
+				envs = append(envs, "POD_NAME=my-super-pod-42")
+			})
+
+			Context("when START_COMMAND env var is provided", func() {
+				It("should exit with a zero exit code", func() {
+					<-session.Exited
+					Expect(session.ExitCode()).To(Equal(0))
+				})
+			})
+
+			Context("when START_COMMAND env var is NOT provided", func() {
+				BeforeEach(func() {
+					envs = []string{}
+				})
+
+				It("should exit with a non-zero exit code", func() {
+					<-session.Exited
+					Expect(session.ExitCode()).ToNot(Equal(0))
+				})
+			})
+		})
+
+		Context("Environment variables", func() {
+			BeforeEach(func() {
+				mockLauncher = "mock-launchers/verify-env-vars.sh"
+			})
+
+			Context("when CF_INSTANCE_INDEX is provided", func() {
+				BeforeEach(func() {
+					envs = append(envs, "POD_NAME=my-super-pod-42")
+				})
+
+				It("should exit with a zero exit code", func() {
+					<-session.Exited
+					Expect(session.ExitCode()).To(Equal(0))
+				})
+
+				It("should expose the INSTANCE_INDEX as environment name", func() {
+					Eventually(session.Out, 5*time.Second).Should(gbytes.Say("INSTANCE_INDEX:42"))
+				})
+			})
+
+			Context("when INSTANCE_INDEX is NOT provided", func() {
+				It("should exit with a non-zero exit code", func() {
+					<-session.Exited
+					Expect(session.ExitCode()).ToNot(Equal(0))
+				})
+			})
+
+			Context("when CF_INSTANCE_INDEX is provided", func() {
+				BeforeEach(func() {
+					envs = append(envs, "POD_NAME=my-super-pod-11")
+				})
+
+				It("should exit with a zero exit code", func() {
+					<-session.Exited
+					Expect(session.ExitCode()).To(Equal(0))
+				})
+
+				It("should expose the CF_INSTANCE_INDEX as environment name", func() {
+					Eventually(session.Out, 5*time.Second).Should(gbytes.Say("CF_INSTANCE_INDEX:11"))
+				})
+			})
+
+			Context("when CF_INSTANCE_INDEX is NOT provided", func() {
+				It("should exit with a non-zero exit code", func() {
+					<-session.Exited
+					Expect(session.ExitCode()).ToNot(Equal(0))
+				})
+			})
+		})
+	})
+
+	Context("When no launcher is provided", func() {
+		BeforeEach(func() {
+			envs = []string{"START_COMMAND=run-it", "POD_NAME=my-super-pod-11"}
+			launchPath, err = gexec.Build("code.cloudfoundry.org/eirinifs/launchcmd")
+			Expect(err).ToNot(HaveOccurred())
+		})
+
+		JustBeforeEach(func() {
+			cmd := exec.Command(launchPath) //#nosec
+			cmd.Env = envs
+			session, err = gexec.Start(cmd, GinkgoWriter, GinkgoWriter)
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It("should fallback to the default command, which is not present on your machine", func() {
+			<-session.Exited
+			Expect(session.ExitCode()).ToNot(Equal(0))
+		})
+	})
+
+})

launchcmd/mock-launchers/verify-args.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+[ "$1" = /home/vcap/app ] || exit 1
+[ "$2" = dummy ] || exit 2

launchcmd/mock-launchers/verify-env-vars.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+echo "INSTANCE_INDEX:$INSTANCE_INDEX"
+echo "CF_INSTANCE_INDEX:$CF_INSTANCE_INDEX"