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IOStackTest.cpp
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IOStackTest.cpp
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/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* IOStackTest.cpp
* Test fixture for the IOStack class.
* Copyright (C) 2013 Simon Newton
*/
#include <cppunit/extensions/HelperMacros.h>
#include <memory>
#include <iostream>
#include <string>
#include "ola/Logging.h"
#include "ola/io/IOStack.h"
#include "ola/io/IOQueue.h"
#include "ola/io/MemoryBlockPool.h"
#include "ola/testing/TestUtils.h"
using ola::io::IOStack;
using ola::io::IOQueue;
using ola::io::IOVec;
using ola::io::MemoryBlockPool;
using std::string;
class IOStackTest: public CppUnit::TestFixture {
public:
CPPUNIT_TEST_SUITE(IOStackTest);
CPPUNIT_TEST(testBasicWrite);
CPPUNIT_TEST(testBlockOverflow);
CPPUNIT_TEST(testIOVec);
CPPUNIT_TEST(testAppendToQueue);
CPPUNIT_TEST(testBlockReuse);
CPPUNIT_TEST_SUITE_END();
public:
void testBasicWrite();
void testBlockOverflow();
void testIOVec();
void testAppendToQueue();
void testBlockReuse();
private:
unsigned int SumLengthOfIOVec(const struct IOVec *iov, int iocnt);
};
CPPUNIT_TEST_SUITE_REGISTRATION(IOStackTest);
/**
* Sum up the length of data in a IOVec
*/
unsigned int IOStackTest::SumLengthOfIOVec(const struct IOVec *iov,
int iocnt) {
unsigned int sum = 0;
for (int i = 0; i < iocnt; iov++, i++)
sum += iov->iov_len;
return sum;
}
/*
* Check that basic prepending works.
*/
void IOStackTest::testBasicWrite() {
IOStack stack;
OLA_ASSERT_EQ(0u, stack.Size());
OLA_ASSERT_TRUE(stack.Empty());
uint8_t data1[] = {0, 1};
uint8_t data2[] = {2};
uint8_t data3[] = {3, 4};
stack.Write(data1, sizeof(data1));
OLA_ASSERT_EQ(2u, stack.Size());
stack.Write(data2, sizeof(data2));
OLA_ASSERT_EQ(3u, stack.Size());
stack.Write(data3, sizeof(data3));
OLA_ASSERT_EQ(5u, stack.Size());
std::ostringstream str;
stack.Dump(&str);
OLA_ASSERT_EQ(
string("03 04 02 00 01 .....\n"),
str.str());
unsigned int data_size = stack.Size();
uint8_t output[data_size];
OLA_ASSERT_EQ(data_size, stack.Read(output, data_size));
const uint8_t expected_data[] = {3, 4, 2, 0, 1};
OLA_ASSERT_DATA_EQUALS(expected_data, sizeof(expected_data), output,
data_size);
}
/*
* Check that overflowing blocks works
*/
void IOStackTest::testBlockOverflow() {
// block size of 4
MemoryBlockPool pool(4);
IOStack stack(&pool);
uint8_t data1[] = {0, 1, 2, 3, 4};
uint8_t data2[] = {5, 6, 7, 8, 9};
uint8_t data3[] = {0xa, 0xb, 0xc, 0xd, 0xe};
stack.Write(data1, sizeof(data1));
OLA_ASSERT_EQ(5u, stack.Size());
stack.Write(data2, sizeof(data2));
OLA_ASSERT_EQ(10u, stack.Size());
stack.Write(data3, sizeof(data3));
OLA_ASSERT_EQ(15u, stack.Size());
unsigned int data_size = stack.Size();
uint8_t output[data_size];
OLA_ASSERT_EQ(data_size, stack.Read(output, data_size));
const uint8_t expected_data[] = {0xa, 0xb, 0xc, 0xd, 0xe, 5, 6, 7, 8, 9,
0, 1, 2, 3, 4};
OLA_ASSERT_DATA_EQUALS(expected_data, sizeof(expected_data), output,
data_size);
}
/**
* Test getting / setting IOVec work.
*/
void IOStackTest::testIOVec() {
MemoryBlockPool pool(4);
IOStack stack(&pool);
uint8_t data1[] = {5, 6, 7, 8};
uint8_t data2[] = {0, 1, 2, 3, 4};
stack.Write(data1, sizeof(data1));
stack.Write(data2, sizeof(data2));
OLA_ASSERT_EQ(9u, stack.Size());
OLA_ASSERT_FALSE(stack.Empty());
int iocnt;
const struct IOVec *vector = stack.AsIOVec(&iocnt);
OLA_ASSERT_EQ(9u, SumLengthOfIOVec(vector, iocnt));
OLA_ASSERT_EQ(3, iocnt);
stack.FreeIOVec(vector);
}
/**
* Test appending IOStacks to an IOQueue works.
*/
void IOStackTest::testAppendToQueue() {
MemoryBlockPool pool(4);
IOStack stack(&pool);
uint8_t data1[] = {2, 1, 0};
uint8_t data2[] = {6, 5, 4, 3};
stack.Write(data1, sizeof(data1));
stack.Write(data2, sizeof(data2));
OLA_ASSERT_EQ(7u, stack.Size());
IOQueue queue(&pool);
stack.MoveToIOQueue(&queue);
OLA_ASSERT_TRUE(stack.Empty());
OLA_ASSERT_EQ(7u, queue.Size());
uint8_t expected_data[] = {6, 5, 4, 3, 2, 1, 0};
uint8_t tmp_data[100];
unsigned int queue_size = queue.Peek(tmp_data, sizeof(tmp_data));
OLA_ASSERT_EQ(7u, queue_size);
OLA_ASSERT_DATA_EQUALS(tmp_data, queue_size, expected_data,
sizeof(expected_data));
// now add a second stack
uint8_t data3[] = {0xb, 0xa};
uint8_t data4[] = {0xf, 0xe, 0xd, 0xc};
stack.Write(data3, sizeof(data3));
stack.Write(data4, sizeof(data4));
OLA_ASSERT_EQ(6u, stack.Size());
stack.MoveToIOQueue(&queue);
OLA_ASSERT_TRUE(stack.Empty());
OLA_ASSERT_EQ(13u, queue.Size());
uint8_t expected_data2[] = {6, 5, 4, 3, 2, 1, 0, 0xf, 0xe, 0xd, 0xc, 0xb,
0xa};
queue_size = queue.Peek(tmp_data, sizeof(tmp_data));
OLA_ASSERT_EQ(13u, queue_size);
OLA_ASSERT_DATA_EQUALS(tmp_data, queue_size, expected_data2,
sizeof(expected_data2));
OLA_ASSERT_EQ(4u, pool.BlocksAllocated());
}
/**
* Confirm we reuse blocks
*/
void IOStackTest::testBlockReuse() {
MemoryBlockPool pool(4);
{
IOStack stack(&pool);
uint8_t data1[] = {6, 5, 3, 3, 2, 1, 0};
stack.Write(data1, sizeof(data1));
OLA_ASSERT_EQ(7u, stack.Size());
}
{
IOStack stack(&pool);
uint8_t data1[] = {0xf, 0xe, 0xd, 0xc, 0xb, 0xa};
stack.Write(data1, sizeof(data1));
OLA_ASSERT_EQ(6u, stack.Size());
}
OLA_ASSERT_EQ(2u, pool.BlocksAllocated());
pool.Purge();
OLA_ASSERT_EQ(0u, pool.BlocksAllocated());
}