| // Copyright 2016 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.devtools.build.lib.bazel.repository.downloader; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static org.junit.Assert.assertThrows; |
| import static org.mockito.ArgumentMatchers.any; |
| import static org.mockito.ArgumentMatchers.eq; |
| import static org.mockito.ArgumentMatchers.same; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.times; |
| import static org.mockito.Mockito.verify; |
| import static org.mockito.Mockito.verifyNoMoreInteractions; |
| import static org.mockito.Mockito.when; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.devtools.build.lib.bazel.repository.downloader.RetryingInputStream.Reconnector; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InterruptedIOException; |
| import java.net.SocketTimeoutException; |
| import java.net.URLConnection; |
| import org.junit.After; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Unit tests for {@link RetryingInputStream}. */ |
| @RunWith(JUnit4.class) |
| public class RetryingInputStreamTest { |
| |
| private final InputStream delegate = mock(InputStream.class); |
| private final InputStream newDelegate = mock(InputStream.class); |
| private final Reconnector reconnector = mock(Reconnector.class); |
| private final URLConnection connection = mock(URLConnection.class); |
| private final RetryingInputStream stream = new RetryingInputStream(delegate, reconnector); |
| |
| @After |
| public void after() throws Exception { |
| verifyNoMoreInteractions(delegate, newDelegate, reconnector); |
| } |
| |
| @Test |
| public void close_callsDelegate() throws Exception { |
| stream.close(); |
| verify(delegate).close(); |
| } |
| |
| @Test |
| public void available_callsDelegate() throws Exception { |
| stream.available(); |
| verify(delegate).available(); |
| } |
| |
| @Test |
| public void read_callsdelegate() throws Exception { |
| stream.read(); |
| verify(delegate).read(); |
| } |
| |
| @Test |
| public void bufferRead_callsdelegate() throws Exception { |
| byte[] buffer = new byte[1024]; |
| stream.read(buffer); |
| verify(delegate).read(same(buffer), eq(0), eq(1024)); |
| } |
| |
| @Test |
| public void readThrowsExceptionWhenDisabled_passesThrough() throws Exception { |
| stream.disabled = true; |
| when(delegate.read()).thenThrow(new IOException()); |
| assertThrows(IOException.class, () -> stream.read()); |
| verify(delegate).read(); |
| } |
| |
| @Test |
| public void readInterrupted_alwaysPassesThrough() throws Exception { |
| when(delegate.read()).thenThrow(new InterruptedIOException()); |
| assertThrows(InterruptedIOException.class, () -> stream.read()); |
| verify(delegate).read(); |
| } |
| |
| @Test |
| @SuppressWarnings("unchecked") |
| public void readTimesOut_retries() throws Exception { |
| when(delegate.read()).thenReturn(1).thenThrow(new SocketTimeoutException()); |
| when(reconnector.connect(any(Throwable.class), any(ImmutableMap.class))).thenReturn(connection); |
| when(connection.getInputStream()).thenReturn(newDelegate); |
| when(newDelegate.read()).thenReturn(2); |
| when(connection.getHeaderField("Content-Range")).thenReturn("bytes 1-42/42"); |
| assertThat(stream.read()).isEqualTo(1); |
| assertThat(stream.read()).isEqualTo(2); |
| verify(reconnector).connect(any(Throwable.class), eq(ImmutableMap.of("Range", "bytes=1-"))); |
| verify(delegate, times(2)).read(); |
| verify(delegate).close(); |
| verify(newDelegate).read(); |
| } |
| |
| @Test |
| @SuppressWarnings("unchecked") |
| public void failureWhenNoBytesAreRead_doesntUseRange() throws Exception { |
| when(delegate.read()).thenThrow(new SocketTimeoutException()); |
| when(newDelegate.read()).thenReturn(1); |
| when(reconnector.connect(any(Throwable.class), any(ImmutableMap.class))).thenReturn(connection); |
| when(connection.getInputStream()).thenReturn(newDelegate); |
| assertThat(stream.read()).isEqualTo(1); |
| verify(reconnector).connect(any(Throwable.class), eq(ImmutableMap.<String, String>of())); |
| verify(delegate).read(); |
| verify(delegate).close(); |
| verify(newDelegate).read(); |
| } |
| |
| @Test |
| @SuppressWarnings("unchecked") |
| public void reconnectFails_alwaysPassesThrough() throws Exception { |
| when(delegate.read()).thenThrow(new IOException()); |
| when(reconnector.connect(any(Throwable.class), any(ImmutableMap.class))) |
| .thenThrow(new IOException()); |
| assertThrows(IOException.class, () -> stream.read()); |
| verify(delegate).read(); |
| verify(delegate).close(); |
| verify(reconnector).connect(any(Throwable.class), any(ImmutableMap.class)); |
| } |
| |
| @Test |
| @SuppressWarnings("unchecked") |
| public void maxRetries_givesUp() throws Exception { |
| when(delegate.read()) |
| .thenReturn(1) |
| .thenThrow(new IOException()) |
| .thenThrow(new IOException()) |
| .thenThrow(new IOException()) |
| .thenThrow(new SocketTimeoutException()); |
| when(reconnector.connect(any(Throwable.class), any(ImmutableMap.class))).thenReturn(connection); |
| when(connection.getInputStream()).thenReturn(delegate); |
| when(connection.getHeaderField("Content-Range")).thenReturn("bytes 1-42/42"); |
| stream.read(); |
| SocketTimeoutException e = assertThrows(SocketTimeoutException.class, () -> stream.read()); |
| assertThat(e.getSuppressed()).hasLength(3); |
| verify(reconnector, times(3)) |
| .connect(any(Throwable.class), eq(ImmutableMap.of("Range", "bytes=1-"))); |
| verify(delegate, times(5)).read(); |
| verify(delegate, times(3)).close(); |
| } |
| } |