tests: check orphaned processes are reaped

tests/apps/zombies-buildpack/CHECKS

@@ -0,0 +1 @@
+/ go

tests/apps/zombies-buildpack/Procfile

@@ -0,0 +1 @@
+web: bin/web

tests/apps/zombies-buildpack/go.mod

@@ -0,0 +1,4 @@
+module dokku.me/web
+
+// +heroku goVersion go1.12
+go 1.12

tests/apps/zombies-buildpack/web.go

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+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"os/exec"
+)
+
+func main() {
+	// spawn an orphaned zombie
+	err := exec.Command("/bin/bash", "-c", "/bin/false &").Run()
+	if err != nil {
+		panic(err)
+	}
+
+	http.HandleFunc("/", hello)
+	fmt.Println("listening...")
+	err = http.ListenAndServe(":"+os.Getenv("PORT"), nil)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func hello(res http.ResponseWriter, req *http.Request) {
+	fmt.Fprintln(res, "go")
+}

tests/apps/zombies-dockerfile-no-tini/CHECKS

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+/ go

tests/apps/zombies-dockerfile-no-tini/Dockerfile

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+FROM golang:1.12
+
+ADD . /go/src/github.com/dokku/apps/web
+WORKDIR /go/src/github.com/dokku/apps/web
+
+RUN go install -v ./...

tests/apps/zombies-dockerfile-no-tini/Procfile

@@ -0,0 +1 @@
+web: /go/bin/web

tests/apps/zombies-dockerfile-no-tini/go.mod

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+module dokku.me/web
+
+go 1.12

tests/apps/zombies-dockerfile-no-tini/web.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"os/exec"
+)
+
+func main() {
+	// spawn an orphaned zombie
+	err := exec.Command("/bin/bash", "-c", "/bin/false &").Run()
+	if err != nil {
+		panic(err)
+	}
+
+	http.HandleFunc("/", hello)
+	fmt.Println("listening...")
+	err = http.ListenAndServe(":"+os.Getenv("PORT"), nil)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func hello(res http.ResponseWriter, req *http.Request) {
+	fmt.Fprintln(res, "go")
+}

tests/apps/zombies-dockerfile-tini/CHECKS

@@ -0,0 +1 @@
+/ go

tests/apps/zombies-dockerfile-tini/Dockerfile

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+FROM golang:1.12
+
+ADD . /go/src/github.com/dokku/apps/web
+WORKDIR /go/src/github.com/dokku/apps/web
+
+RUN go install -v ./...
+
+ENV TINI_VERSION v0.18.0
+ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /tini
+RUN chmod +x /tini
+ENTRYPOINT ["/tini", "--"]

tests/apps/zombies-dockerfile-tini/Procfile

@@ -0,0 +1 @@
+web: /go/bin/web

tests/apps/zombies-dockerfile-tini/go.mod

@@ -0,0 +1,3 @@
+module dokku.me/web
+
+go 1.12

tests/apps/zombies-dockerfile-tini/web.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"os/exec"
+)
+
+func main() {
+	// spawn an orphaned zombie
+	err := exec.Command("/bin/bash", "-c", "/bin/false &").Run()
+	if err != nil {
+		panic(err)
+	}
+
+	http.HandleFunc("/", hello)
+	fmt.Println("listening...")
+	err = http.ListenAndServe(":"+os.Getenv("PORT"), nil)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func hello(res http.ResponseWriter, req *http.Request) {
+	fmt.Fprintln(res, "go")
+}

tests/unit/50_init_1.bats

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+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  global_setup
+  create_app
+}
+
+teardown() {
+  destroy_app
+  global_teardown
+}
+
+@test "(init) buildpack" {
+  deploy_app zombies-buildpack
+  run ps ax
+  echo "output: $output"
+  assert_output_contains "<defunct>" "0"
+}

tests/unit/50_init_2.bats

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+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  global_setup
+  create_app
+}
+
+teardown() {
+  destroy_app
+  global_teardown
+}
+
+@test "(init) dockerfile no tini" {
+  deploy_app zombies-dockerfile-no-tini
+  run ps ax
+  echo "output: $output"
+  assert_output_contains "<defunct>" "0"
+}

tests/unit/50_init_3.bats

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+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  global_setup
+  create_app
+}
+
+teardown() {
+  destroy_app
+  global_teardown
+}
+
+@test "(init) dockerfile with tini" {
+  deploy_app zombies-dockerfile-tini
+  run ps ax
+  echo "output: $output"
+  assert_output_contains "<defunct>" "0"
+}