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/*
* (C) Copyright 1996- ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
*
* In applying this licence, ECMWF does not waive the privileges and immunities
* granted to it by virtue of its status as an intergovernmental organisation nor
* does it submit to any jurisdiction.
*/
#include "eckit/codec/FileStream.h"
#include "eckit/codec/Session.h"
#include "eckit/exception/Exceptions.h"
#include "eckit/io/FileHandle.h"
#include "eckit/io/PooledHandle.h"
#include "eckit/testing/Test.h"
namespace eckit::test {
CASE("Stream interoperability with eckit::DataHandle") {
SECTION("own pointer") {
codec::Stream s;
{
eckit::DataHandle* datahandle = new eckit::FileHandle("test_io_session.data");
datahandle->openForWrite(0);
s = codec::Stream{datahandle};
}
s.datahandle().close();
}
SECTION("shared pointer") {
codec::Stream s;
{
std::shared_ptr<eckit::DataHandle> datahandle = std::make_shared<eckit::FileHandle>("test_io_session.data");
datahandle->openForWrite(0);
s = codec::Stream{datahandle};
}
s.datahandle().close();
}
SECTION("reference") {
codec::Stream s;
eckit::FileHandle datahandle("test_io_session.data");
datahandle.openForWrite(0);
s = codec::Stream{datahandle};
s.datahandle().close();
}
}
CASE("Test seek-for-write works when opening OutputFileStream for append") {
std::string s1("write \n");
std::string s2("append \n");
std::string s3("overwrite\n");
{
codec::Stream f = codec::OutputFileStream("append-test");
f.write(s1.c_str(), s1.size());
}
{
codec::Stream f = codec::OutputFileStream("append-test", codec::Mode::append);
auto offset = f.position();
f.write(s2.c_str(), s2.size());
// Rewind to beginning of append
f.seek(offset);
f.write(s3.c_str(), s3.size());
}
{
codec::Stream f = codec::InputFileStream("append-test");
std::string expected = s1 + s3;
std::string read(expected.size(), ' ');
f.read(const_cast<char*>(read.data()), read.size());
EXPECT_EQUAL(read, expected);
}
}
CASE("Opening same file in same scope") {
// Opening same file within same scope will avoid opening it multiple times, good for perfmance
// write a file
{
codec::OutputFileStream out("test_io_session.data");
out.write("line1\n", 6);
out.write("line2\n", 6);
out.write("line3\n", 6);
}
std::string l1(5, ' ');
std::string l2(5, ' ');
std::string l3(5, ' ');
codec::Stream f1 = codec::InputFileStream{"test_io_session.data"};
f1.seek(0 * 6);
f1.read(const_cast<char*>(l1.data()), 5);
codec::Stream f2 = codec::InputFileStream{"test_io_session.data"};
f2.seek(1 * 6);
f2.read(const_cast<char*>(l2.data()), 5);
codec::Stream f3 = codec::InputFileStream{"test_io_session.data"};
f3.seek(2 * 6);
f3.read(const_cast<char*>(l3.data()), 5);
EXPECT_EQUAL(l1, "line1");
EXPECT_EQUAL(l2, "line2");
EXPECT_EQUAL(l3, "line3");
auto& pooled_handle = dynamic_cast<eckit::PooledHandle&>(f1.datahandle());
EXPECT(pooled_handle.nbOpens() == 1);
EXPECT(pooled_handle.nbSeeks() == 3);
EXPECT(pooled_handle.nbReads() == 3);
}
CASE("Opening same file in parallel scopes") {
// Files are opened and closed within each scope, bad for performance
// write a file
{
codec::OutputFileStream out("test_io_session.data");
out.write("line1\n", 6);
out.write("line2\n", 6);
out.write("line3\n", 6);
}
std::string l1(5, ' ');
std::string l2(5, ' ');
std::string l3(5, ' ');
{
codec::Stream f1 = codec::InputFileStream{"test_io_session.data"};
f1.seek(0 * 6);
f1.read(const_cast<char*>(l1.data()), 5);
auto& pooled_handle = dynamic_cast<eckit::PooledHandle&>(f1.datahandle());
EXPECT(pooled_handle.nbOpens() == 1);
EXPECT(pooled_handle.nbSeeks() == 1);
EXPECT(pooled_handle.nbReads() == 1);
}
{
codec::Stream f2 = codec::InputFileStream{"test_io_session.data"};
f2.seek(1 * 6);
f2.read(const_cast<char*>(l2.data()), 5);
auto& pooled_handle = dynamic_cast<eckit::PooledHandle&>(f2.datahandle());
EXPECT(pooled_handle.nbOpens() == 1);
EXPECT(pooled_handle.nbSeeks() == 1);
EXPECT(pooled_handle.nbReads() == 1);
}
{
codec::Stream f3 = codec::InputFileStream{"test_io_session.data"};
f3.seek(2 * 6);
f3.read(const_cast<char*>(l3.data()), 5);
auto& pooled_handle = dynamic_cast<eckit::PooledHandle&>(f3.datahandle());
EXPECT(pooled_handle.nbOpens() == 1);
EXPECT(pooled_handle.nbSeeks() == 1);
EXPECT(pooled_handle.nbReads() == 1);
}
}
CASE("Opening same file in parallel scopes with Session") {
// Declaring this in an outer scope will keep storage of InputFileStream
// within nested scopes, so that files will not be opened/closed repeatedly
codec::Session session;
// write a file
{
codec::OutputFileStream out("test_io_session.data");
out.write("line1\n", 6);
out.write("line2\n", 6);
out.write("line3\n", 6);
}
std::string l1(5, ' ');
std::string l2(5, ' ');
std::string l3(5, ' ');
{
codec::Stream f1 = codec::InputFileStream{"test_io_session.data"};
f1.seek(0 * 6);
f1.read(const_cast<char*>(l1.data()), 5);
auto& pooled_handle = dynamic_cast<eckit::PooledHandle&>(f1.datahandle());
EXPECT(pooled_handle.nbOpens() == 1);
EXPECT(pooled_handle.nbSeeks() == 1);
EXPECT(pooled_handle.nbReads() == 1);
}
{
codec::Stream f2 = codec::InputFileStream{"test_io_session.data"};
f2.seek(1 * 6);
f2.read(const_cast<char*>(l2.data()), 5);
auto& pooled_handle = dynamic_cast<eckit::PooledHandle&>(f2.datahandle());
EXPECT(pooled_handle.nbOpens() == 1);
EXPECT(pooled_handle.nbSeeks() == 2);
EXPECT(pooled_handle.nbReads() == 2);
}
{
codec::Stream f3 = codec::InputFileStream{"test_io_session.data"};
f3.seek(2 * 6);
f3.read(const_cast<char*>(l3.data()), 5);
auto& pooled_handle = dynamic_cast<eckit::PooledHandle&>(f3.datahandle());
EXPECT(pooled_handle.nbOpens() == 1);
EXPECT(pooled_handle.nbSeeks() == 3);
EXPECT(pooled_handle.nbReads() == 3);
}
}
} // namespace eckit::test
int main(int argc, char** argv) {
return eckit::testing::run_tests(argc, argv);
}
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