tests: do not modify the existing app.json via jq

The jq binary doesn't support jsonc, so we can't modify it for testing purposes. Instead, just create an app.json with the correct heroku.postdeploy task.

tests/apps/python/app-heroku-postdeploy.json

@@ -0,0 +1,24 @@
+{
+  "healthchecks": {
+    "web": [
+      {
+        "attempts": 2,
+        "content": "python/http.server",
+        "name": "check-1",
+        "path": "/",
+        "timeout": 5,
+        "type": "startup",
+        "wait": 2
+      }
+    ]
+  },
+  "scripts": {
+    "dokku": {
+      // this is a comment for the postdeploy script
+      "postdeploy": "touch /app/postdeploy.test",
+      // this is a comment for the predeploy script
+      "predeploy": "touch /app/predeploy.test"
+    },
+    "postdeploy": "touch /app/heroku-postdeploy.test"
+  }
+}

tests/unit/app-json.bats

@@ -47,7 +47,12 @@ teardown() {
 }
 
 @test "(app-json) app.json scripts postdeploy" {
-  run deploy_app python dokku@$DOKKU_DOMAIN:$TEST_APP add_postdeploy_command
+  run /bin/bash -c "dokku app-json:set $TEST_APP appjson-path app-heroku-postdeploy.json"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run deploy_app python dokku@$DOKKU_DOMAIN:$TEST_APP
   echo "output: $output"
   echo "status: $status"
   assert_success

tests/unit/test_helper.bash

@@ -561,15 +561,6 @@ add_release_command() {
   echo "release: touch /app/release.test" >>"$APP_REPO_DIR/Procfile"
 }
 
-add_postdeploy_command() {
-  local APP="$1"
-  local APP_REPO_DIR="$2"
-  [[ -z "$APP" ]] && local APP="$TEST_APP"
-  touch "$APP_REPO_DIR/app.json"
-  contents=$(jq '.scripts.postdeploy = "touch /app/heroku-postdeploy.test"' "$APP_REPO_DIR/app.json")
-  echo "${contents}" >"$APP_REPO_DIR/app.json"
-}
-
 move_dockerfile_into_place() {
   local APP="$1"
   local APP_REPO_DIR="$2"