How to use getString method of com.github.kittinunf.fuel.core.requests.StringTest class

...18import java.net.HttpURLConnection19import java.util.UUID20class StringTest : MockHttpTestCase() {21    private fun randomString() = UUID.randomUUID().toString()22    private fun getString(string: String, path: String = "string"): Request {23        mock.chain(24            request = mock.request().withPath("/$path"),25            response = mock.response().withBody(string)26        )27        return Fuel.request(Method.GET, mock.path(path))28    }29    private fun mocked404(method: Method = Method.GET, path: String = "invalid/url"): Request {30        mock.chain(31            request = mock.request().withPath("/$path"),32            response = mock.response().withStatusCode(HttpURLConnection.HTTP_NOT_FOUND)33        )34        return Fuel.request(method, mock.path(path))35    }36    @Test37    fun response() {38        val string = randomString()39        val (request, response, result) = getString(string).responseString()40        val (data, error) = result41        assertThat("Expected data, actual error $error", data, notNullValue())42        assertThat(data, equalTo(string))43        assertThat("Expected request to be not null", request, notNullValue())44        assertThat("Expected response to be not null", response, notNullValue())45    }46    @Test47    fun responseFailure() {48        val (_, _, result) = mocked404().responseString()49        val (data, error) = result50        assertThat("Expected error, actual data $data", error, notNullValue())51    }52    @Test53    fun responseHandler() {54        val string = randomString()55        val running = getString(string).responseString(object : Handler<String> {56            override fun success(value: String) {57                assertThat(value, equalTo(string))58            }59            override fun failure(error: FuelError) {60                fail("Expected data, actual error $error")61            }62        })63        running.join()64    }65    @Test66    fun responseHandlerFailure() {67        val running = mocked404().responseString(object : Handler<String> {68            override fun success(value: String) {69                fail("Expected error, actual data $value")70            }71            override fun failure(error: FuelError) {72                assertThat(error, notNullValue())73                assertThat(error.exception as? HttpException, isA(HttpException::class.java))74            }75        })76        running.join()77    }78    @Test79    fun responseResponseHandler() {80        val string = randomString()81        val running = getString(string).responseString(object : ResponseHandler<String> {82            override fun success(request: Request, response: Response, value: String) {83                assertThat("Expected data to be not null", value, notNullValue())84                assertThat(value, equalTo(string))85                assertThat("Expected request to be not null", request, notNullValue())86                assertThat("Expected response to be not null", response, notNullValue())87            }88            override fun failure(request: Request, response: Response, error: FuelError) {89                fail("Expected data, actual error $error")90            }91        })92        running.join()93    }94    @Test95    fun responseResponseHandlerFailure() {96        val running = mocked404().responseString(object : ResponseHandler<String> {97            override fun success(request: Request, response: Response, value: String) {98                fail("Expected error, actual data $value")99            }100            override fun failure(request: Request, response: Response, error: FuelError) {101                assertThat(error, notNullValue())102                assertThat(error.exception as? HttpException, isA(HttpException::class.java))103                assertThat("Expected request to be not null", request, notNullValue())104                assertThat("Expected response to be not null", response, notNullValue())105            }106        })107        running.join()108    }109    @Test110    fun responseResultHandler() {111        val string = randomString()112        val running = getString(string).responseString { result: Result<String, FuelError> ->113            val (data, error) = result114            assertThat("Expected data, actual error $error", data, notNullValue())115            assertThat(data, equalTo(string))116        }117        running.join()118    }119    @Test120    fun responseResultHandlerFailure() {121        val running = mocked404().responseString { result: Result<String, FuelError> ->122            val (data, error) = result123            assertThat("Expected error, actual data $data", error, notNullValue())124        }125        running.join()126    }127    @Test128    fun responseResponseResultHandler() {129        val string = randomString()130        val running = getString(string).responseString { request, response, result ->131            val (data, error) = result132            assertThat("Expected data, actual error $error", data, notNullValue())133            assertThat(data, equalTo(string))134            assertThat("Expected request to be not null", request, notNullValue())135            assertThat("Expected response to be not null", response, notNullValue())136        }137        running.join()138    }139    @Test140    fun responseResponseResultHandlerFailure() {141        val running = mocked404().responseString { request, response, result ->142            val (data, error) = result143            assertThat("Expected error, actual data $data", error, notNullValue())144            assertThat(error!!.exception as? HttpException, isA(HttpException::class.java))...