httpclient5/src/test/java/org/apache/hc/client5/http/impl/TestDefaultHttpRequestRetryStrategy.java

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 * to you under the Apache License, Version 2.0 (the
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package org.apache.hc.client5.http.impl;

import java.io.IOException;
import java.net.ConnectException;
import java.net.NoRouteToHostException;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;
import java.time.Instant;
import java.time.temporal.ChronoUnit;

import javax.net.ssl.SSLException;

import org.apache.hc.client5.http.classic.methods.HttpGet;
import org.apache.hc.client5.http.utils.DateUtils;
import org.apache.hc.core5.http.ConnectionClosedException;
import org.apache.hc.core5.http.HttpHeaders;
import org.apache.hc.core5.http.HttpResponse;
import org.apache.hc.core5.http.message.BasicHttpResponse;
import org.apache.hc.core5.util.TimeValue;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

public class TestDefaultHttpRequestRetryStrategy {

    private DefaultHttpRequestRetryStrategy retryStrategy;

    @BeforeEach
    public void setup() {
        this.retryStrategy = new DefaultHttpRequestRetryStrategy(3, TimeValue.ofMilliseconds(1234L));
    }

    @Test
    public void testBasics() throws Exception {
        final HttpResponse response1 = new BasicHttpResponse(503, "Oopsie");
        Assertions.assertTrue(this.retryStrategy.retryRequest(response1, 1, null));
        Assertions.assertTrue(this.retryStrategy.retryRequest(response1, 2, null));
        Assertions.assertTrue(this.retryStrategy.retryRequest(response1, 3, null));
        Assertions.assertFalse(this.retryStrategy.retryRequest(response1, 4, null));
        final HttpResponse response2 = new BasicHttpResponse(500, "Big Time Oopsie");
        Assertions.assertFalse(this.retryStrategy.retryRequest(response2, 1, null));
        final HttpResponse response3 = new BasicHttpResponse(429, "Oopsie");
        Assertions.assertTrue(this.retryStrategy.retryRequest(response3, 1, null));
        Assertions.assertTrue(this.retryStrategy.retryRequest(response3, 2, null));
        Assertions.assertTrue(this.retryStrategy.retryRequest(response3, 3, null));
        Assertions.assertFalse(this.retryStrategy.retryRequest(response3, 4, null));

        Assertions.assertEquals(TimeValue.ofMilliseconds(1234L), this.retryStrategy.getRetryInterval(response1, 1, null));
    }

    @Test
    public void testRetryAfterHeaderAsLong() throws Exception {
        final HttpResponse response = new BasicHttpResponse(503, "Oopsie");
        response.setHeader(HttpHeaders.RETRY_AFTER, "321");

        Assertions.assertEquals(TimeValue.ofSeconds(321L), this.retryStrategy.getRetryInterval(response, 3, null));
    }

    @Test
    public void testRetryAfterHeaderAsDate() throws Exception {
        this.retryStrategy = new DefaultHttpRequestRetryStrategy(3, TimeValue.ZERO_MILLISECONDS);
        final HttpResponse response = new BasicHttpResponse(503, "Oopsie");
        response.setHeader(HttpHeaders.RETRY_AFTER, DateUtils.formatStandardDate(Instant.now().plus(100, ChronoUnit.SECONDS)));

        Assertions.assertTrue(this.retryStrategy.getRetryInterval(response, 3, null).compareTo(TimeValue.ZERO_MILLISECONDS) > 0);
    }

    @Test
    public void testRetryAfterHeaderAsPastDate() throws Exception {
        final HttpResponse response = new BasicHttpResponse(503, "Oopsie");
        response.setHeader(HttpHeaders.RETRY_AFTER, DateUtils.formatStandardDate(Instant.now().minus(100, ChronoUnit.SECONDS)));

        Assertions.assertEquals(TimeValue.ofMilliseconds(1234L), this.retryStrategy.getRetryInterval(response, 3, null));
    }

    @Test
    public void testInvalidRetryAfterHeader() throws Exception {
        final HttpResponse response = new BasicHttpResponse(503, "Oopsie");
        response.setHeader(HttpHeaders.RETRY_AFTER, "Stuff");

        Assertions.assertEquals(TimeValue.ofMilliseconds(1234L), retryStrategy.getRetryInterval(response, 3, null));
    }

    @Test
    public void noRetryOnConnectTimeout() throws Exception {
        final HttpGet request = new HttpGet("/");

        Assertions.assertFalse(retryStrategy.retryRequest(request, new SocketTimeoutException(), 1, null));
    }

    @Test
    public void noRetryOnConnect() throws Exception {
        final HttpGet request = new HttpGet("/");

        Assertions.assertFalse(retryStrategy.retryRequest(request, new ConnectException(), 1, null));
    }

    @Test
    public void noRetryOnConnectionClosed() throws Exception {
        final HttpGet request = new HttpGet("/");

        Assertions.assertFalse(retryStrategy.retryRequest(request, new ConnectionClosedException(), 1, null));
    }

    @Test
    public void noRetryForNoRouteToHostException() {
        final HttpGet request = new HttpGet("/");

        Assertions.assertFalse(retryStrategy.retryRequest(request, new NoRouteToHostException(), 1, null));
    }

    @Test
    public void noRetryOnSSLFailure() throws Exception {
        final HttpGet request = new HttpGet("/");

        Assertions.assertFalse(retryStrategy.retryRequest(request, new SSLException("encryption failed"), 1, null));
    }

    @Test
    public void noRetryOnUnknownHost() throws Exception {
        final HttpGet request = new HttpGet("/");

        Assertions.assertFalse(retryStrategy.retryRequest(request, new UnknownHostException(), 1, null));
    }

    @Test
    public void noRetryOnAbortedRequests() throws Exception {
        final HttpGet request = new HttpGet("/");
        request.cancel();

        Assertions.assertFalse(retryStrategy.retryRequest(request, new IOException(), 1, null));
    }

    @Test
    public void retryOnNonAbortedRequests() throws Exception {
        final HttpGet request = new HttpGet("/");

        Assertions.assertTrue(retryStrategy.retryRequest(request, new IOException(), 1, null));
    }

}