Data Feeders & Parameterization

Attach one feeder per scenario. Variables are substituted in paths, headers and payloads using ${name}. Use queryParam for URL parameters.

Factory	Values
`csv("testdata/search.csv")`	CSV columns become variables; rows cycle in file order.
`json("testdata/products.json")`	JSON array of objects; rows cycle in file order.
`random("userId", 1, 10000)`	Random integer, both bounds inclusive.
`uuid("requestId")`	New UUID value.
`sequence("orderId", 1000, 1)`	Sequence starting at 1000, incrementing by 1.
`constant("tenant", "demo")`	Fixed string value.

There are no fromCsv, fromList, fromSupplier, circular() or parameterless random() factory/strategy methods. CSV and JSON feeders cycle automatically; the built-in CSV parser is a simple comma-delimited parser, not a full quoted-field CSV parser. Supply simple data without embedded commas and verify the file exists before execution.

Example

testdata/search.csv
query,clientId
laptop,client-1
keyboard,client-2

import io.testfly.loadtest.BaseLoadTest;
import io.testfly.loadtest.LoadTestFeeder;
import org.testng.annotations.Test;

public class SearchLoadTest extends BaseLoadTest {
    @Test
    public void searchWithData() {
        loadScenario("Search").users(10)
            .feed(LoadTestFeeder.csv("testdata/search.csv"))
            .step("Search").get("/search")
                .queryParam("q", "${query}")
                .header("X-Client-ID", "${clientId}").and()
            .run().assertP95Below(300);
    }
}

CSV/JSON files may be on the filesystem or classpath. Share synthetic credentials only; do not commit real passwords. See the multi-step example for using a feeder in a JSON login body.

Example​

Example