A/B Test Outbound
Zuplo is extensible, so we don't have a built-in policy for A/B Test Outbound, instead we have a template here that shows you how you can use your superpower (code) to achieve your goals. To learn more about custom policies see the documentation.
This example shows how to perform an action on incoming requests based on the
result of a randomly generated number. A/B tests could also be performed on
properties such as the request.user
.
A/B tests can also be combined with other policies by passing data to downstream
policies. For example, you could save a value in ContextData
based on the
results of the A/B test and use that value in a later policy to modify the
request.
Example Custom Policy
The code below is an example of how this custom policy module could be implemented.
import { ZuploContext, ZuploRequest } from "@zuplo/runtime";
export default async function (
response: Response,
request: ZuploRequest,
context: ZuploContext,
) {
// Generate a random number to segment the test groups
const score = Math.random();
// Get the outgoing response body
const data = await response.json();
// Modify the body based on the random value
if (score < 0.5) {
data.testEnabled = true;
} else {
data.testEnabled = false;
}
// Stringify the data object
const body = JSON.stringify(data);
// Return a new response with the updated body
return new Response(body, response);
}
Configuration
The example below shows how to configure a custom code policy in the 'policies.json' document that utilizes the above example policy code.
{
"name": "ab-test-outbound",
"policyType": "custom-code-outbound",
"handler": {
"export": "default",
"module": "$import(./modules/ab-test-outbound)"
}
}
Read more about how policies work