/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hbase.io.hfile;
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import java.io.IOException;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.hbase.testclassification.IOTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.ExpectedException;
/**
* Unit test suite covering HFileBlock positional read logic.
*/
@Category({IOTests.class, SmallTests.class})
public class TestHFileBlockPositionalRead {
@Rule
public ExpectedException exception = ExpectedException.none();
@Test
public void testPositionalReadNoExtra() throws IOException {
long position = 0;
int bufOffset = 0;
int necessaryLen = 10;
int extraLen = 0;
int totalLen = necessaryLen + extraLen;
byte[] buf = new byte[totalLen];
FSDataInputStream in = mock(FSDataInputStream.class);
when(in.read(position, buf, bufOffset, totalLen)).thenReturn(totalLen);
boolean ret = HFileBlock.positionalReadWithExtra(in, position, buf,
bufOffset, necessaryLen, extraLen);
assertFalse("Expect false return when no extra bytes requested", ret);
verify(in).read(position, buf, bufOffset, totalLen);
verifyNoMoreInteractions(in);
}
@Test
public void testPositionalReadShortReadOfNecessaryBytes() throws IOException {
long position = 0;
int bufOffset = 0;
int necessaryLen = 10;
int extraLen = 0;
int totalLen = necessaryLen + extraLen;
byte[] buf = new byte[totalLen];
FSDataInputStream in = mock(FSDataInputStream.class);
when(in.read(position, buf, bufOffset, totalLen)).thenReturn(5);
when(in.read(5, buf, 5, 5)).thenReturn(5);
boolean ret = HFileBlock.positionalReadWithExtra(in, position, buf,
bufOffset, necessaryLen, extraLen);
assertFalse("Expect false return when no extra bytes requested", ret);
verify(in).read(position, buf, bufOffset, totalLen);
verify(in).read(5, buf, 5, 5);
verifyNoMoreInteractions(in);
}
@Test
public void testPositionalReadExtraSucceeded() throws IOException {
long position = 0;
int bufOffset = 0;
int necessaryLen = 10;
int extraLen = 5;
int totalLen = necessaryLen + extraLen;
byte[] buf = new byte[totalLen];
FSDataInputStream in = mock(FSDataInputStream.class);
when(in.read(position, buf, bufOffset, totalLen)).thenReturn(totalLen);
boolean ret = HFileBlock.positionalReadWithExtra(in, position, buf,
bufOffset, necessaryLen, extraLen);
assertTrue("Expect true return when reading extra bytes succeeds", ret);
verify(in).read(position, buf, bufOffset, totalLen);
verifyNoMoreInteractions(in);
}
@Test
public void testPositionalReadExtraFailed() throws IOException {
long position = 0;
int bufOffset = 0;
int necessaryLen = 10;
int extraLen = 5;
int totalLen = necessaryLen + extraLen;
byte[] buf = new byte[totalLen];
FSDataInputStream in = mock(FSDataInputStream.class);
when(in.read(position, buf, bufOffset, totalLen)).thenReturn(necessaryLen);
boolean ret = HFileBlock.positionalReadWithExtra(in, position, buf,
bufOffset, necessaryLen, extraLen);
assertFalse("Expect false return when reading extra bytes fails", ret);
verify(in).read(position, buf, bufOffset, totalLen);
verifyNoMoreInteractions(in);
}
@Test
public void testPositionalReadShortReadCompletesNecessaryAndExtraBytes()
throws IOException {
long position = 0;
int bufOffset = 0;
int necessaryLen = 10;
int extraLen = 5;
int totalLen = necessaryLen + extraLen;
byte[] buf = new byte[totalLen];
FSDataInputStream in = mock(FSDataInputStream.class);
when(in.read(position, buf, bufOffset, totalLen)).thenReturn(5);
when(in.read(5, buf, 5, 10)).thenReturn(10);
boolean ret = HFileBlock.positionalReadWithExtra(in, position, buf,
bufOffset, necessaryLen, extraLen);
assertTrue("Expect true return when reading extra bytes succeeds", ret);
verify(in).read(position, buf, bufOffset, totalLen);
verify(in).read(5, buf, 5, 10);
verifyNoMoreInteractions(in);
}
@Test
public void testPositionalReadPrematureEOF() throws IOException {
long position = 0;
int bufOffset = 0;
int necessaryLen = 10;
int extraLen = 0;
int totalLen = necessaryLen + extraLen;
byte[] buf = new byte[totalLen];
FSDataInputStream in = mock(FSDataInputStream.class);
when(in.read(position, buf, bufOffset, totalLen)).thenReturn(9);
when(in.read(position, buf, bufOffset, totalLen)).thenReturn(-1);
exception.expect(IOException.class);
exception.expectMessage("EOF");
HFileBlock.positionalReadWithExtra(in, position, buf, bufOffset,
necessaryLen, extraLen);
}
}