1 files changed, 134 insertions, 0 deletions
diff --git a/vespajlib/src/test/java/ai/vespa/util/http/hc4/retry/DelayedConnectionLevelRetryHandlerTest.java b/vespajlib/src/test/java/ai/vespa/util/http/hc4/retry/DelayedConnectionLevelRetryHandlerTest.java
new file mode 100644
index 00000000000..7330a91d75c
--- /dev/null
+++ b/vespajlib/src/test/java/ai/vespa/util/http/hc4/retry/DelayedConnectionLevelRetryHandlerTest.java
@@ -0,0 +1,134 @@
+// Copyright 2020 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package ai.vespa.util.http.hc4.retry;
+
+import org.apache.http.client.protocol.HttpClientContext;
+import org.junit.Test;
+
+import javax.net.ssl.SSLException;
+import java.io.IOException;
+import java.net.ConnectException;
+import java.time.Duration;
+import java.util.Arrays;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+/**
+ * @author bjorncs
+ */
+public class DelayedConnectionLevelRetryHandlerTest {
+
+    @SuppressWarnings("unchecked")
+    @Test
+    public void retry_consumers_are_invoked() {
+        RetryConsumer<IOException> retryConsumer = (RetryConsumer<IOException>) mock(RetryConsumer.class);
+        RetryFailedConsumer<IOException> retryFailedConsumer = (RetryFailedConsumer<IOException>) mock(RetryFailedConsumer.class);
+
+        Duration delay = Duration.ofSeconds(10);
+        int maxRetries = 5;
+
+        DelayedConnectionLevelRetryHandler handler = DelayedConnectionLevelRetryHandler.Builder
+                .withFixedDelay(delay, maxRetries)
+                .withSleeper(mock(Sleeper.class))
+                .onRetry(retryConsumer)
+                .onRetryFailed(retryFailedConsumer)
+                .build();
+
+        IOException exception = new IOException();
+        HttpClientContext ctx = new HttpClientContext();
+        int lastExecutionCount = maxRetries + 1;
+        for (int i = 1; i <= lastExecutionCount; i++) {
+            handler.retryRequest(exception, i, ctx);
+        }
+
+        verify(retryFailedConsumer).onRetryFailed(exception, lastExecutionCount, ctx);
+        for (int i = 1; i < lastExecutionCount; i++) {
+            verify(retryConsumer).onRetry(exception, delay, i, ctx);
+        }
+    }
+
+    @Test
+    public void retry_with_fixed_delay_sleeps_for_expected_duration() {
+        Sleeper sleeper = mock(Sleeper.class);
+
+        Duration delay = Duration.ofSeconds(2);
+        int maxRetries = 2;
+
+        DelayedConnectionLevelRetryHandler handler = DelayedConnectionLevelRetryHandler.Builder
+                .withFixedDelay(delay, maxRetries)
+                .withSleeper(sleeper)
+                .build();
+
+        IOException exception = new IOException();
+        HttpClientContext ctx = new HttpClientContext();
+        int lastExecutionCount = maxRetries + 1;
+        for (int i = 1; i <= lastExecutionCount; i++) {
+            handler.retryRequest(exception, i, ctx);
+        }
+
+        verify(sleeper, times(2)).sleep(delay);
+    }
+
+    @Test
+    public void retry_with_fixed_backoff_sleeps_for_expected_durations() {
+        Sleeper sleeper = mock(Sleeper.class);
+
+        Duration startDelay = Duration.ofMillis(500);
+        Duration maxDelay = Duration.ofSeconds(5);
+        int maxRetries = 10;
+
+        DelayedConnectionLevelRetryHandler handler = DelayedConnectionLevelRetryHandler.Builder
+                .withExponentialBackoff(startDelay, maxDelay, maxRetries)
+                .withSleeper(sleeper)
+                .build();
+
+        IOException exception = new IOException();
+        HttpClientContext ctx = new HttpClientContext();
+        int lastExecutionCount = maxRetries + 1;
+        for (int i = 1; i <= lastExecutionCount; i++) {
+            handler.retryRequest(exception, i, ctx);
+        }
+
+        verify(sleeper).sleep(startDelay);
+        verify(sleeper).sleep(Duration.ofSeconds(1));
+        verify(sleeper).sleep(Duration.ofSeconds(2));
+        verify(sleeper).sleep(Duration.ofSeconds(4));
+        verify(sleeper, times(6)).sleep(Duration.ofSeconds(5));
+    }
+
+    @Test
+    public void retries_for_listed_exceptions_until_max_retries_exceeded() {
+        int maxRetries = 2;
+
+        DelayedConnectionLevelRetryHandler handler = DelayedConnectionLevelRetryHandler.Builder
+                .withFixedDelay(Duration.ofSeconds(2), maxRetries)
+                .retryForExceptions(Arrays.asList(SSLException.class, ConnectException.class))
+                .withSleeper(mock(Sleeper.class))
+                .build();
+
+        SSLException sslException = new SSLException("ssl error");
+        HttpClientContext ctx = new HttpClientContext();
+        int lastExecutionCount = maxRetries + 1;
+        for (int i = 1; i < lastExecutionCount; i++) {
+            assertTrue(handler.retryRequest(sslException, i, ctx));
+        }
+        assertFalse(handler.retryRequest(sslException, lastExecutionCount, ctx));
+    }
+
+    @Test
+    public void does_not_retry_for_non_listed_exception() {
+        DelayedConnectionLevelRetryHandler handler = DelayedConnectionLevelRetryHandler.Builder
+                .withFixedDelay(Duration.ofSeconds(2), 2)
+                .retryForExceptions(Arrays.asList(SSLException.class, ConnectException.class))
+                .withSleeper(mock(Sleeper.class))
+                .build();
+
+        IOException ioException = new IOException();
+        HttpClientContext ctx = new HttpClientContext();
+        assertFalse(handler.retryRequest(ioException, 1, ctx));
+    }
+
+}
+\ No newline at end of file