added some more validations

README.md

@@ -21,6 +21,7 @@ For more information see also [my blog post](https://dev-investor.de/finanz-apps
 
 ```
 make dist
+make test
 ```
 
 The compiled MoneyMoney extension can then be found in `dist/SankeyChart.lua` and installed with `make install`.

package.json

@@ -14,6 +14,8 @@
   "author": "Christoph Massmann <[email protected]>",
   "license": "MIT",
   "scripts": {
-    "test": "lua ./src/SankeyChartTest.lua | html-validate --stdin"
+    "test": "npm run test-compile-validate && npm run test-placeholder",
+    "test-compile-validate": "lua ./src/SankeyChartTest.lua | html-validate --stdin",
+    "test-placeholder": "grep -qE '\\${([A-Z_]+)}' dist/SankeyChart.lua && (echo 'ERROR: Placeholders have not been replaced in dist!' && exit 1) || exit 0"
   }
 }