Regression Test Generator for JUnit 5

Generate editable JUnit 5 and REST Assured regression test templates from API comparison results. Review and run before relying on them.

ProRuns in your browser

Pro previewRegression test generation is a Pro feature, free to use while IntegrateKit is in beta.

Generated code is a template. Review it, adapt it to your project and run it before relying on it.

Generated in your browser from the response you paste. Nothing is uploaded.

Baseline response (JSON)

MethodPathStatus

PackageClass name

Dynamic fields or paths (presence only / ignored)

Generated Java (editable)

Needs JUnit 5 and REST Assured + Hamcrest on the test classpath, Java 17+.

About this tool

Generate an editable JUnit 5 regression test from a known-good API response. Choose REST Assured for field-by-field Hamcrest assertions, or JSONAssert for a whole-document snapshot comparison. Dynamic fields such as timestamps and request IDs are only checked for presence or ignored.

The output is a template: review it, adapt it to your project and run it before relying on it. A built-in structure check catches unbalanced brackets and unterminated strings while you edit.

How to use it

Paste the baseline response.
Set the method, path, expected status, package and class name, and list dynamic fields.
Generate, review and edit, then copy or download the .java file.

Limitations

The structure check is not a compiler.
Very large responses are capped at 150 assertions per test.

Example

Baseline

{"orderId":1001,"status":"SHIPPED","meta":{"requestId":"4ad0c3e2"}}

Generated (REST Assured, excerpt)

.get("/api/orders/1001")
.then()
    .statusCode(200)
    .body("orderId", equalTo(1001))
    .body("status", equalTo("SHIPPED"))
    .body("meta.requestId", notNullValue()); // dynamic