Learning Pentaho Data Integration 8 CE - Third Edition

Testing the script using the Test script button

In the example that we just built, the code was very simple and didn't require much attention. However, when you have more code or maybe a complicated algorithm to run on your data, testing the code effectively before running it with your data could be a great idea. The Test script button allows you to do this: checking whether the script does what it is intended to do. It actually generates a Transformation in the back with two steps: a Generate Rows step with sample data and a copy of the JavaScript step that works on that sample.

This is how you test your JavaScript code:

1. Click on the Test script button and a window will appear to create a set of rows to test. Fill it as shown in the following ...