API testing : Dynamic payload and dynamic assertions [duplicate] - karate

Question

I want to construct a complex POJO during run time based on the scenario .
In the below sample request structure consider addresses.line1 as mandatory field
And I dont have to pass the other fields everytime but need to do on test cases basis.
{
"site": [{
"code": "string",
"mrn": "string"
}
],
"email": ["string"],
"addresses": [{
"line1": "string",
"line2": "string",
"city": "string",
"state": "string",
"postalCode": "string"
}
],
"names": [{
"first": "string",
"middle": "string",
"last": "string",
"suffix": "string"
}
]
}
Ex:
For TestCase#1 I need only below JSON:
{
"addresses": [{
"line1": "string"
}
]
}
Where as for TestCase#2 I need below JSON
{
"email": ["string"],
"addresses": [{
"line1": "string",
"line2": "string"
}
],
"names": [{
"first": "string",
"last": "string"
}
]
}
I referred https://github.com/intuit/karate/blob/master/karate-demo/src/test/java/demo/outline/examples.feature
but the example was pretty straight forward with replaceable values.
I was looking for something like #JsonInclude(JsonInclude.Include.NON_DEFAULT)

Answer 1

Karate is designed to completely avoid POJO-s and give you complete control over creating and modifying complex JSON. So I suggest you temporarily forget about POJO-s and Java, else you won't get the best out of Karate.
There are a few ways to do this, but here is one. First store the complex JSON in a file, called main.json
Then creating the different variants is simple:
Background:
* def main = read('main.json')
Scenario: one
* def payload = karate.filterKeys(main, 'addresses')
Scenario: two
* def payload = main
* remove payload.site
I suggest you read the docs on reading files for more ideas, look out for embedded expressions.
Also see: https://stackoverflow.com/a/51896522/143475