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// This source code is released into the public domain.
#include <catch2/catch_test_macros.hpp>
import nihil.std;
import nihil.posix;
namespace {
SCENARIO("nihil::execvp() can be used to spawn a shell")
{
GIVEN("An execvp object")
{
auto exec = nihil::execvp("sh", nihil::argv{"sh", "-c", "x=1; echo $x"});
THEN("sh was found in $PATH")
{
if (!exec)
FAIL(exec.error());
}
WHEN("The shell is executed")
{
auto output = std::string();
auto capture = nihil::make_capture(nihil::stdout_fileno, output).value();
auto status = nihil::spawn(exec.value(), capture).value().wait().value();
THEN("The exit code is 0")
{
REQUIRE(status.status() == 0);
}
AND_THEN("The expected output was captured")
{
REQUIRE(output == "1\n");
}
}
}
}
SCENARIO("nihil::execvp() returns the shell's exit code")
{
GIVEN("An execvp object")
{
auto exec = nihil::execvp("sh", nihil::argv{"sh", "-c", "x=42; exit $x"});
THEN("sh was found in $PATH")
{
if (!exec)
FAIL(exec.error());
}
WHEN("The shell is executed")
{
auto output = std::string();
auto capture = nihil::make_capture(nihil::stdout_fileno, output).value();
auto status = nihil::spawn(exec.value(), capture).value().wait().value();
THEN("The exit code is 1")
{
REQUIRE(status.status() == 42);
}
}
}
}
SCENARIO("nihil::execvp() returns an error if the executable is not in $PATH")
{
GIVEN("An execvp object for a non-existent executable")
{
auto exec = nihil::execvp("nihil_no_such_executable", nihil::argv{"x"});
THEN("A no_such_file_or_directory error is returned")
{
REQUIRE(!exec);
REQUIRE(exec.error().root_cause() == std::errc::no_such_file_or_directory);
}
}
}
} // anonymous namespace
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