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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/display/manager/display_port_observer.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/memory/raw_ptr.h"
#include "base/strings/stringprintf.h"
#include "base/test/bind.h"
#include "base/test/task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/display/manager/test/fake_display_snapshot.h"
namespace display {
namespace {
// Creates fake DP connector sysfs directory as the following.
//
// # ls conn_path
// > connector_id
// > typec_connector
//
// # ls conn_path/typec_connector
// > uevent
bool CreateFakeDpConn(const base::FilePath& conn_path, int id, int port_num) {
if (!base::CreateDirectory(conn_path)) {
return false;
}
auto conn_id = base::StringPrintf("%d", id);
if (!base::WriteFile(conn_path.Append("connector_id"), conn_id)) {
return false;
}
auto typec_conn_path = conn_path.Append("typec_connector");
if (!base::CreateDirectory(typec_conn_path)) {
return false;
}
auto typec_conn_uevent = base::StringPrintf("TYPEC_PORT=port%d", port_num);
if (!base::WriteFile(typec_conn_path.Append("uevent"), typec_conn_uevent)) {
return false;
}
return true;
}
std::unique_ptr<DisplaySnapshot> CreateDisplaySnapshot(
uint64_t base_connector_id,
base::FilePath sys_path) {
return FakeDisplaySnapshot::Builder()
.SetId(1)
.SetNativeMode(gfx::Size(1024, 768))
.SetBaseConnectorId(base_connector_id)
.SetSysPath(sys_path)
.Build();
}
} // namespace
class DisplayPortObserverTest : public testing::Test {
public:
DisplayPortObserverTest() = default;
DisplayPortObserverTest(const DisplayPortObserverTest&) = delete;
DisplayPortObserverTest& operator=(const DisplayPortObserverTest&) = delete;
~DisplayPortObserverTest() override = default;
// testing::Test
void SetUp() override {
display_port_observer_ = std::make_unique<DisplayPortObserver>(
nullptr,
base::BindLambdaForTesting([&](const std::vector<uint32_t>& port_nums) {
cached_port_nums_ = port_nums;
}));
ASSERT_TRUE(scoped_temp_dir_.CreateUniqueTempDir());
temp_dir_ = scoped_temp_dir_.GetPath();
Test::SetUp();
}
protected:
std::unique_ptr<DisplayPortObserver> display_port_observer_;
base::FilePath temp_dir_;
base::ScopedTempDir scoped_temp_dir_;
base::test::TaskEnvironment task_environment_;
std::vector<uint32_t> cached_port_nums_;
};
TEST_F(DisplayPortObserverTest, OnNoDisplayConnected) {
// 4 Type C ports, each with a dedicated DP connector
ASSERT_TRUE(CreateFakeDpConn(temp_dir_.Append("card0-DP-1"), 256, 0));
ASSERT_TRUE(CreateFakeDpConn(temp_dir_.Append("card0-DP-2"), 266, 1));
ASSERT_TRUE(CreateFakeDpConn(temp_dir_.Append("card0-DP-3"), 275, 2));
ASSERT_TRUE(CreateFakeDpConn(temp_dir_.Append("card0-DP-4"), 284, 3));
// Only internal display with an id not dedicated to any DP connector
std::vector<raw_ptr<DisplaySnapshot, VectorExperimental>> display_states;
auto display_state = CreateDisplaySnapshot(236, temp_dir_);
display_states.push_back(display_state.get());
display_port_observer_->OnDisplayConfigurationChanged(
std::move(display_states));
task_environment_.RunUntilIdle();
EXPECT_TRUE(cached_port_nums_.empty());
}
TEST_F(DisplayPortObserverTest, OnMultipleDisplaysConnected) {
// 4 Type C ports, each with a dedicated DP connector
ASSERT_TRUE(CreateFakeDpConn(temp_dir_.Append("card0-DP-1"), 256, 0));
ASSERT_TRUE(CreateFakeDpConn(temp_dir_.Append("card0-DP-2"), 266, 1));
ASSERT_TRUE(CreateFakeDpConn(temp_dir_.Append("card0-DP-3"), 275, 2));
ASSERT_TRUE(CreateFakeDpConn(temp_dir_.Append("card0-DP-4"), 284, 3));
// 2 displays on port 0 and 1 display on port 2
std::vector<raw_ptr<DisplaySnapshot, VectorExperimental>> display_states;
auto display_state1 = CreateDisplaySnapshot(256, temp_dir_);
display_states.push_back(display_state1.get());
auto display_state2 = CreateDisplaySnapshot(256, temp_dir_);
display_states.push_back(display_state2.get());
auto display_state3 = CreateDisplaySnapshot(275, temp_dir_);
display_states.push_back(display_state3.get());
display_port_observer_->OnDisplayConfigurationChanged(
std::move(display_states));
task_environment_.RunUntilIdle();
const std::vector<uint32_t> kExpectedPortNums{0, 0, 2};
EXPECT_EQ(kExpectedPortNums, cached_port_nums_);
}
} // namespace display
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