The stub can be configured to respond with a given response if the request matches a predicate (see the whenRequestMatches method).
Note however, that this is not type-safe with respect to the type of the response body - the stub doesn't have a way to check if the type of the body in the configured response is the same as the one specified by the request. Some conversions will be attempted (e.g. from a String to a custom mapped type, as specified in the request, see the documentation for more details).
For web socket requests, the stub can be configured to returned both custom sttp.ws.WebSocket implementations, as well as sttp.ws.testing.WebSocketStub instances.
Predicates can match requests basing on the URI or headers. A ClassCastException might occur if for a given request, a response is specified with the incorrect or inconvertible body type.
Send the given request. Should only be used when implementing new backends, or backend wrappers. Client code should instead use the send methods on the request type, e.g. Request.send.
Send the given request. Should only be used when implementing new backends, or backend wrappers. Client code should instead use the send methods on the request type, e.g. Request.send.