service-mock.bal

import ballerina/http;
import ballerina/io;

boolean isHelloServiceStarted;

// Before function to start the service
function startMock () {
    isHelloServiceStarted = test:startServices("mock");
}

// After function to stop the service
function stopMock () {
    test:stopServices("mock");
}

@test:Config{
    before: "startMock",
    after:"stopMock"
}
// This is the test function to test the service
function testService () {
    endpoint http:Client httpEndpoint {
        url:"http://0.0.0.0:9092"
    };

    // Check whether the service is started
    test:assertTrue(isHelloServiceStarted, msg = "Hello service failed to start");

    // Send a GET request to the specified endpoint
    var response = httpEndpoint -> get("/hello");
    match response {
        http:Response resp => {
            var jsonRes = resp.getJsonPayload();
            json expected = {"Hello":"World"};
            test:assertEquals(jsonRes, expected);
        }
        http:HttpConnectorError err => test:assertFail(msg = "Failed to call the endpoint: " + uri);
    }
}


// The service we are going to start and test
endpoint http:Listener helloEP {
    port: 9092
};

@http:ServiceConfig {
    basePath: "/hello"
}
service<http:Service> HelloServiceMock bind helloEP {

    @http:ResourceConfig {
        methods:["GET"],
        path:"/"
    }
    getEvents (endpoint caller, http:Request req) {
        http:Response res = new;
        json j = {"Hello":"World"};
        res.setJsonPayload(j);
        _ = caller -> respond(res);
    }
}