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// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2021-2022 Bartosz Golaszewski <brgl@bgdev.pl>
#include <catch2/catch_all.hpp>
#include <gpiod.hpp>
#include <sstream>
#include <system_error>
#include <utility>
#include "gpiosim.hpp"
#include "helpers.hpp"
using ::gpiosim::make_sim;
namespace {
TEST_CASE("chip constructor works", "[chip]")
{
SECTION("open an existing GPIO chip")
{
auto sim = make_sim().build();
REQUIRE_NOTHROW(::gpiod::chip(sim.dev_path()));
}
SECTION("opening a nonexistent file fails with ENOENT")
{
REQUIRE_THROWS_MATCHES(::gpiod::chip("/dev/nonexistent"),
::std::system_error, system_error_matcher(ENOENT));
}
SECTION("opening a file that is not a device fails with ENOTTY")
{
REQUIRE_THROWS_MATCHES(::gpiod::chip("/tmp"),
::std::system_error, system_error_matcher(ENOTTY));
}
SECTION("opening a non-GPIO character device fails with ENODEV")
{
REQUIRE_THROWS_MATCHES(::gpiod::chip("/dev/null"),
::std::system_error, system_error_matcher(ENODEV));
}
SECTION("move constructor")
{
auto sim = make_sim()
.set_label("foobar")
.build();
::gpiod::chip first(sim.dev_path());
REQUIRE_THAT(first.get_info().label(), Catch::Matchers::Equals("foobar"));
::gpiod::chip second(::std::move(first));
REQUIRE_THAT(second.get_info().label(), Catch::Matchers::Equals("foobar"));
}
}
TEST_CASE("chip operators work", "[chip]")
{
auto sim = make_sim()
.set_label("foobar")
.build();
::gpiod::chip chip(sim.dev_path());
SECTION("assignment operator")
{
auto moved_sim = make_sim()
.set_label("moved")
.build();
::gpiod::chip moved_chip(moved_sim.dev_path());
REQUIRE_THAT(chip.get_info().label(), Catch::Matchers::Equals("foobar"));
chip = ::std::move(moved_chip);
REQUIRE_THAT(chip.get_info().label(), Catch::Matchers::Equals("moved"));
}
SECTION("boolean operator")
{
REQUIRE(chip);
chip.close();
REQUIRE_FALSE(chip);
}
}
TEST_CASE("chip properties can be read", "[chip]")
{
auto sim = make_sim()
.set_num_lines(8)
.set_label("foobar")
.build();
::gpiod::chip chip(sim.dev_path());
SECTION("get device path")
{
REQUIRE_THAT(chip.path(), Catch::Matchers::Equals(sim.dev_path()));
}
SECTION("get file descriptor")
{
REQUIRE(chip.fd() >= 0);
}
}
TEST_CASE("line lookup by name works", "[chip]")
{
auto sim = make_sim()
.set_num_lines(8)
.set_line_name(0, "foo")
.set_line_name(2, "bar")
.set_line_name(3, "baz")
.set_line_name(5, "xyz")
.build();
::gpiod::chip chip(sim.dev_path());
SECTION("lookup successful")
{
REQUIRE(chip.get_line_offset_from_name("baz") == 3);
}
SECTION("lookup failed")
{
REQUIRE(chip.get_line_offset_from_name("nonexistent") < 0);
}
}
TEST_CASE("line lookup: behavior for duplicate names", "[chip]")
{
auto sim = make_sim()
.set_num_lines(8)
.set_line_name(0, "foo")
.set_line_name(2, "bar")
.set_line_name(3, "baz")
.set_line_name(5, "bar")
.build();
::gpiod::chip chip(sim.dev_path());
REQUIRE(chip.get_line_offset_from_name("bar") == 2);
}
TEST_CASE("closed chip can no longer be used", "[chip]")
{
auto sim = make_sim().build();
::gpiod::chip chip(sim.dev_path());
chip.close();
REQUIRE_THROWS_AS(chip.path(), ::gpiod::chip_closed);
}
TEST_CASE("stream insertion operator works for chip", "[chip]")
{
auto sim = make_sim()
.set_num_lines(4)
.set_label("foobar")
.build();
::gpiod::chip chip(sim.dev_path());
::std::stringstream buf;
SECTION("open chip")
{
::std::stringstream expected;
expected << "gpiod::chip(path=" << sim.dev_path() <<
", info=gpiod::chip_info(name=\"" << sim.name() <<
"\", label=\"foobar\", num_lines=4))";
buf << chip;
REQUIRE_THAT(buf.str(), Catch::Matchers::Equals(expected.str()));
}
SECTION("closed chip")
{
chip.close();
REQUIRE_THAT(chip, stringify_matcher<::gpiod::chip>("gpiod::chip(closed)"));
}
}
} /* namespace */
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