Verifying Response Json Schema Using Restassured

What is Schema Validation?

Rather than checking individual field values, schema validation confirms that the overall structure of a JSON response (field names, types, required fields) matches an expected schema definition.

Example

.then().assertThat()
    .body(matchesJsonSchemaInClasspath("user-schema.json"));

Why This Matters

Schema validation catches structural regressions — like a field unexpectedly becoming null, changing type, or disappearing entirely — that individual field assertions might miss if not written for every field.