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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "device/udev_linux/udev_watcher.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace device {
namespace {
constexpr char kSubsystem[] = "subsystem";
constexpr char kDevtype[] = "devtype";
constexpr char kEmptyParam[] = "";
TEST(UdevWatcherTest, FilterParamsReturnCorrectValues) {
UdevWatcher::Filter subsystem_devtype_filter(kSubsystem, kDevtype);
EXPECT_TRUE(subsystem_devtype_filter.subsystem());
EXPECT_TRUE(subsystem_devtype_filter.devtype());
std::string_view filter_subsystem = subsystem_devtype_filter.subsystem();
std::string_view filter_devtype = subsystem_devtype_filter.devtype();
EXPECT_EQ(kSubsystem, filter_subsystem);
EXPECT_EQ(kDevtype, filter_devtype);
}
TEST(UdevWatcherTest, FilterTreatsEmptyStringAsDontCare) {
// If an empty string is provided for |subsystem_in| or |devtype_in|,
// the subsystem or devtype method should return nullptr instead of a
// zero-length C string. nullptr indicates "don't care" when passed
// to udev.
UdevWatcher::Filter subsystem_filter(kSubsystem, kEmptyParam);
EXPECT_TRUE(subsystem_filter.subsystem());
EXPECT_FALSE(subsystem_filter.devtype());
UdevWatcher::Filter devtype_filter(kEmptyParam, kDevtype);
EXPECT_FALSE(devtype_filter.subsystem());
EXPECT_TRUE(devtype_filter.devtype());
}
} // namespace
} // namespace device
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