VILLASnode/tests/unit/config.cpp

/** Unit tests for config features.
 *
 * @author Steffen Vogel <svogel2@eonerc.rwth-aachen.de>
 * @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
 * @license Apache 2.0
 *********************************************************************************/

#include <cstdio>
#include <cstdlib>
#include <criterion/criterion.h>

#include <villas/utils.hpp>
#include <villas/config_class.hpp>

using namespace villas::node;

// cppcheck-suppress syntaxError
Test(config, env)
{
	const char *cfg_f = "test = \"${MY_ENV_VAR}\"\n";

	std::FILE *f = std::tmpfile();
	std::fputs(cfg_f, f);
	std::rewind(f);

	auto c = Config();

	char env[] = "MY_ENV_VAR=mobydick";
	putenv(env);

	auto *r = c.load(f);
	cr_assert_not_null(r);

	auto *j = json_object_get(r, "test");
	cr_assert_not_null(j);

	cr_assert(json_is_string(j));
	cr_assert_str_eq("mobydick", json_string_value(j));
}

Test(config, include)
{
	const char *cfg_f2 = "magic = 1234\n";

	char f2_fn_tpl[] = "/tmp/villas.unit-test.XXXXXX";
	int f2_fd = mkstemp(f2_fn_tpl);

	std::FILE *f2 = fdopen(f2_fd, "w");
	std::fputs(cfg_f2, f2);
	std::rewind(f2);

	auto cfg_f1 = fmt::format("subval = \"@include {}\"\n", f2_fn_tpl);

	std::FILE *f1 = std::tmpfile();
	std::fputs(cfg_f1.c_str(), f1);
	std::rewind(f1);

	auto env = fmt::format("INCLUDE_FILE={}", f2_fn_tpl).c_str();
	putenv((char *) env);

	auto c = Config();

	auto *r = c.load(f1);
	cr_assert_not_null(r);

	auto *j = json_object_get(r, "subval");
	cr_assert_not_null(j);

	auto *j2 = json_object_get(j, "magic");
	cr_assert_not_null(j2);

	cr_assert(json_is_integer(j2));
	cr_assert_eq(json_number_value(j2), 1234);

	std::fclose(f2);
	std::remove(f2_fn_tpl);
}