How to prepare a nested data structure for a data-driven test in Karate?

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I don’t recommend nesting unless absolutely necessary. You may be able to “flatten” your permutations into a single table, something like this: https://github.com/intuit/karate/issues/661#issue-402624580

That said, look out for the alternate option to Examples: which just might work for your case: https://github.com/intuit/karate#data-driven-features

EDIT: In version 1.3.0, a new @setup life cycle was introduced that changes the example below a bit.

Here’s a simple example:

Feature:

Scenario:
* def data = [{ rows: [{a: 1},{a: 2}] }, { rows: [{a: 3},{a: 4}] }]
* call read('called.feature@one') data

and this is: called.feature:

@ignore
Feature:

@one
Scenario:
* print 'one:', __loop
* call read('called.feature@two') rows

@two
Scenario:
* print 'two:', __loop
* print 'value of a:', a

This is how it looks like in the new HTML report (which is in 0.9.6.RC2 and may need more fine tuning) and it shows off how Karate can support “nesting” even in the report, which Cucumber cannot do. Maybe you can provide feedback and let us know if it is ready for release 🙂

enter image description here

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