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#include "write.hpp"
#include <gtest/gtest.h>
#include <fcntl.h>
#include <unistd.h>
#include "../strings/fstring.hpp"
#include "../strings/mstring.hpp"
#include "../strings/xstring.hpp"
static
io::FD pipew(io::FD& rfd)
{
io::FD wfd;
if (-1 == io::FD::pipe2(rfd, wfd, O_NONBLOCK))
{
rfd = io::FD();
return io::FD();
}
return wfd;
}
class PipeWriter
{
private:
io::FD rfd;
public:
io::WriteFile wf;
public:
PipeWriter(bool lb)
: wf(pipew(rfd), lb)
{}
~PipeWriter()
{
rfd.close();
}
FString slurp()
{
MString tmp;
char buf[4096];
while (true)
{
ssize_t rv = rfd.read(buf, sizeof(buf));
if (rv == -1)
{
if (errno != EAGAIN)
return {"Error, read failed :("};
rv = 0;
}
if (rv == 0)
break;
tmp += XString(buf + 0, buf + rv, nullptr);
}
return FString(tmp);
}
};
TEST(io, write1)
{
PipeWriter pw(false);
io::WriteFile& wf = pw.wf;
wf.really_put("Hello, ", 7);
EXPECT_EQ("", pw.slurp());
wf.put_line("World!\n");
EXPECT_EQ("", pw.slurp());
EXPECT_TRUE(wf.close());
EXPECT_EQ("Hello, World!\n", pw.slurp());
}
TEST(io, write2)
{
PipeWriter pw(true);
io::WriteFile& wf = pw.wf;
wf.really_put("Hello, ", 7);
EXPECT_EQ("", std::string(pw.slurp().c_str()));
wf.put_line("World!");
wf.really_put("XXX", 3);
EXPECT_EQ("Hello, World!\n", std::string(pw.slurp().c_str()));
EXPECT_TRUE(wf.close());
EXPECT_EQ("XXX", std::string(pw.slurp().c_str()));
}
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