feat: add a deployment task test for cnb

tests/apps/python/Procfile

@@ -7,7 +7,7 @@ cron: python3 worker.py
 web: python3 web.py # testing inline comment
 worker: python3 worker.py
 custom: echo -n
-release: touch /app/release.test
+release: python3 release.py
 
 
 # Old version with separate processes (use this if you have issues with the threaded version)

tests/apps/python/release.py

@@ -0,0 +1,10 @@
+#!/usr/bin/env python
+import os
+
+
+def main():
+    print("SECRET_KEY: {0}".format(os.getenv('SECRET_KEY')))
+
+
+if __name__ == '__main__':
+    main()

tests/apps/python/requirements.txt

@@ -0,0 +1 @@
+flask

tests/unit/app-json.bats

@@ -103,3 +103,23 @@ teardown() {
   echo "status: $status"
   assert_success
 }
+
+@test "(app-json) app.json cnb release" {
+  run /bin/bash -c "dokku config:set --no-restart $TEST_APP DOKKU_CNB_EXPERIMENTAL=1 SECRET_KEY=fjdkslafjdk"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run deploy_app python dokku@dokku.me:$TEST_APP add_requirements_txt
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "Executing release task from Procfile"
+  assert_output_contains "SECRET_KEY: fjdkslafjdk"
+
+  run /bin/bash -c "curl $(dokku url $TEST_APP)/env"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains '"SECRET_KEY": "fjdkslafjdk"'
+}