tests: check orphaned processes are reaped

tests/unit/50_init_1.bats

@@ -0,0 +1,20 @@
+#!/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

@@ -0,0 +1,20 @@
+#!/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

@@ -0,0 +1,20 @@
+#!/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"
+}