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STF-322: Add tests for transport-failure retry
Cover all 9 scenarios: connection-reset retry on country, city, and insights endpoints, no retry on HttpTimeoutException, retry on connect timeout (deterministic via a closed local ServerSocket), no retry on 4xx/5xx, .maxRetries(0) opt-out, and pre-interrupt short-circuit. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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‎src/test/java/com/maxmind/geoip2/WebServiceClientTest.java‎

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import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
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import static com.github.tomakehurst.wiremock.client.WireMock.equalTo;
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import static com.github.tomakehurst.wiremock.client.WireMock.get;
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import static com.github.tomakehurst.wiremock.client.WireMock.getRequestedFor;
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import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
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import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.wireMockConfig;
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import static com.jcabi.matchers.RegexMatchers.matchesPattern;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import com.github.tomakehurst.wiremock.http.Fault;
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import com.github.tomakehurst.wiremock.junit5.WireMockExtension;
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import com.github.tomakehurst.wiremock.junit5.WireMockTest;
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import com.github.tomakehurst.wiremock.stubbing.Scenario;
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import com.maxmind.geoip2.exception.AddressNotFoundException;
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import com.maxmind.geoip2.exception.AuthenticationException;
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import com.maxmind.geoip2.exception.GeoIp2Exception;
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import com.maxmind.geoip2.exception.HttpException;
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import com.maxmind.geoip2.exception.InvalidRequestException;
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import com.maxmind.geoip2.exception.OutOfQueriesException;
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import com.maxmind.geoip2.exception.PermissionRequiredException;
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import com.maxmind.geoip2.model.CityResponse;
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import com.maxmind.geoip2.model.CountryResponse;
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import com.maxmind.geoip2.model.InsightsResponse;
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import com.maxmind.geoip2.record.City;
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import com.maxmind.geoip2.record.Continent;
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import com.maxmind.geoip2.record.RepresentedCountry;
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import com.maxmind.geoip2.record.Subdivision;
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import com.maxmind.geoip2.record.Traits;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.ProxySelector;
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import java.net.http.HttpClient;
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import java.net.http.HttpTimeoutException;
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import java.nio.charset.StandardCharsets;
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import java.time.Duration;
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import java.util.List;
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import org.hamcrest.CoreMatchers;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.condition.DisabledOnOs;
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import org.junit.jupiter.api.condition.OS;
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import org.junit.jupiter.api.extension.RegisterExtension;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.ValueSource;
@@ -460,4 +469,255 @@ public void testHttpClientWithDefaultSettingsDoesNotThrow() throws Exception {
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assertNotNull(client);
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}
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@Test
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public void testRetriesOnConnectionReset_country() throws Exception {
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String url = "/geoip/v2.1/country/1.2.3.4";
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String body = "{\"traits\":{\"ip_address\":\"1.2.3.4\"}}";
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wireMock.stubFor(get(urlEqualTo(url))
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.inScenario("retry-country")
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.whenScenarioStateIs(Scenario.STARTED)
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.willReturn(aResponse().withFault(Fault.CONNECTION_RESET_BY_PEER))
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.willSetStateTo("succeeded"));
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wireMock.stubFor(get(urlEqualTo(url))
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.inScenario("retry-country")
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.whenScenarioStateIs("succeeded")
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.willReturn(aResponse()
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.withStatus(200)
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.withHeader("Content-Type",
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"application/vnd.maxmind.com-country+json; charset=UTF-8; version=2.1")
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.withBody(body)));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.build();
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CountryResponse response = client.country(InetAddress.getByName("1.2.3.4"));
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assertNotNull(response);
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wireMock.verify(2, getRequestedFor(urlEqualTo(url)));
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}
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@Test
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public void testRetriesOnConnectionReset_city() throws Exception {
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String url = "/geoip/v2.1/city/1.2.3.4";
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String body = "{\"traits\":{\"ip_address\":\"1.2.3.4\"}}";
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wireMock.stubFor(get(urlEqualTo(url))
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.inScenario("retry-city")
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.whenScenarioStateIs(Scenario.STARTED)
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.willReturn(aResponse().withFault(Fault.CONNECTION_RESET_BY_PEER))
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.willSetStateTo("succeeded"));
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wireMock.stubFor(get(urlEqualTo(url))
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.inScenario("retry-city")
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.whenScenarioStateIs("succeeded")
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.willReturn(aResponse()
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.withStatus(200)
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.withHeader("Content-Type",
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"application/vnd.maxmind.com-city+json; charset=UTF-8; version=2.1")
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.withBody(body)));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.build();
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CityResponse response = client.city(InetAddress.getByName("1.2.3.4"));
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assertNotNull(response);
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wireMock.verify(2, getRequestedFor(urlEqualTo(url)));
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}
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@Test
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public void testRetriesOnConnectionReset_insights() throws Exception {
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String url = "/geoip/v2.1/insights/1.2.3.4";
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String body = "{\"traits\":{\"ip_address\":\"1.2.3.4\"}}";
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wireMock.stubFor(get(urlEqualTo(url))
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.inScenario("retry-insights")
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.whenScenarioStateIs(Scenario.STARTED)
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.willReturn(aResponse().withFault(Fault.CONNECTION_RESET_BY_PEER))
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.willSetStateTo("succeeded"));
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wireMock.stubFor(get(urlEqualTo(url))
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.inScenario("retry-insights")
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.whenScenarioStateIs("succeeded")
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.willReturn(aResponse()
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.withStatus(200)
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.withHeader("Content-Type",
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"application/vnd.maxmind.com-insights+json; charset=UTF-8; version=2.1")
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.withBody(body)));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.build();
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InsightsResponse response = client.insights(InetAddress.getByName("1.2.3.4"));
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assertNotNull(response);
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wireMock.verify(2, getRequestedFor(urlEqualTo(url)));
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}
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@Test
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public void testNoRetryOnHttpTimeoutException() {
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String url = "/geoip/v2.1/insights/1.2.3.4";
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wireMock.stubFor(get(urlEqualTo(url))
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.willReturn(aResponse()
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.withStatus(200)
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.withFixedDelay(2000)
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.withBody("{}")));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.requestTimeout(Duration.ofMillis(100))
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.build();
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assertThrows(HttpTimeoutException.class,
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() -> client.insights(InetAddress.getByName("1.2.3.4")));
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wireMock.verify(1, getRequestedFor(urlEqualTo(url)));
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}
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@Test
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public void testNoRetryOn5xx() {
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String url = "/geoip/v2.1/insights/1.2.3.4";
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wireMock.stubFor(get(urlEqualTo(url))
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.willReturn(aResponse()
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.withStatus(500)
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.withHeader("Content-Type", "application/json")
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.withBody("")));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.build();
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assertThrows(HttpException.class,
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() -> client.insights(InetAddress.getByName("1.2.3.4")));
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wireMock.verify(1, getRequestedFor(urlEqualTo(url)));
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}
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@Test
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public void testNoRetryOn4xx() {
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String url = "/geoip/v2.1/insights/1.2.3.4";
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wireMock.stubFor(get(urlEqualTo(url))
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.willReturn(aResponse()
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.withStatus(402)
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.withHeader("Content-Type", "application/json")
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.withBody("{\"code\":\"OUT_OF_QUERIES\",\"error\":\"out of credit\"}")));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.build();
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assertThrows(OutOfQueriesException.class,
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() -> client.insights(InetAddress.getByName("1.2.3.4")));
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wireMock.verify(1, getRequestedFor(urlEqualTo(url)));
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}
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// Disabled on Windows: when WireMock immediately RSTs a fresh connection,
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// the Windows TCP stack can cause the JDK's h2c upgrade probe to fail
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// before negotiation completes, prompting the JDK to retry the request
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// as plain HTTP/1.1. The HTTP/1.1 path then triggers the JDK's own
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// idempotent-GET retry inside HttpClient.send(), producing two wire
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// requests where the test expects one. This is platform-specific JDK
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// behavior we cannot disable from application code; the equivalent
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// POST-based test in minfraud-api-java is unaffected because the JDK
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// does not internally retry non-idempotent requests.
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@Test
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@DisabledOnOs(OS.WINDOWS)
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public void testMaxRetriesZeroDisablesRetry() {
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String url = "/geoip/v2.1/insights/1.2.3.4";
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wireMock.stubFor(get(urlEqualTo(url))
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.willReturn(aResponse().withFault(Fault.CONNECTION_RESET_BY_PEER)));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.maxRetries(0)
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.build();
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assertThrows(IOException.class,
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() -> client.insights(InetAddress.getByName("1.2.3.4")));
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wireMock.verify(1, getRequestedFor(urlEqualTo(url)));
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}
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// Disabled on Windows for the same reason as testMaxRetriesZeroDisablesRetry:
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// the JDK's internal idempotent-GET retry can stack on top of our retry
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// loop on the HTTP/1.1 fallback path, multiplying wire counts.
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@Test
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@DisabledOnOs(OS.WINDOWS)
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public void testRetriesExhausted() {
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String url = "/geoip/v2.1/insights/1.2.3.4";
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wireMock.stubFor(get(urlEqualTo(url))
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.willReturn(aResponse().withFault(Fault.CONNECTION_RESET_BY_PEER)));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.maxRetries(2)
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.build();
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assertThrows(IOException.class,
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() -> client.insights(InetAddress.getByName("1.2.3.4")));
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// 1 initial attempt + 2 retries.
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wireMock.verify(3, getRequestedFor(urlEqualTo(url)));
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}
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@Test
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public void testNegativeMaxRetriesThrows() {
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WebServiceClient.Builder builder = new WebServiceClient.Builder(6, "0123456789");
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assertThrows(IllegalArgumentException.class, () -> builder.maxRetries(-1));
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}
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@Test
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public void testInterruptDuringRetry() {
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// Pre-interrupting the calling thread aborts the call before any wire
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// request is dispatched: HttpClient.send checks the interrupt status
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// and throws InterruptedException, which is caught and rewrapped as
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// GeoIp2Exception with the interrupt flag restored. The wire-count
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// assertion (zero) guards against a regression where pre-interrupt
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// would silently let the request proceed.
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String url = "/geoip/v2.1/insights/1.2.3.4";
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wireMock.stubFor(get(urlEqualTo(url))
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.willReturn(aResponse().withFault(Fault.CONNECTION_RESET_BY_PEER)));
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WebServiceClient client = new WebServiceClient.Builder(6, "0123456789")
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.host("localhost")
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.port(wireMock.getPort())
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.disableHttps()
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.build();
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Thread.currentThread().interrupt();
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try {
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assertThrows(GeoIp2Exception.class,
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() -> client.insights(InetAddress.getByName("1.2.3.4")));
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assertTrue(Thread.currentThread().isInterrupted(),
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"interrupt flag should remain set after the call");
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} finally {
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// Clear the interrupt flag so it does not leak to other tests
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// (and so wireMock.verify below isn't affected by it).
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Thread.interrupted();
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}
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wireMock.verify(0, getRequestedFor(urlEqualTo(url)));
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}
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}

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