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/*
* Copyright © Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 or 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mru_window_list.h"
#include <mir/test/doubles/stub_surface.h>
#include <mir/test/doubles/stub_session.h>
#include <gtest/gtest.h>
#include <gmock/gmock.h>
using namespace testing;
namespace
{
struct StubSurface : mir::test::doubles::StubSurface
{
MirWindowState state() const override
{
return visible_ ? mir::test::doubles::StubSurface::state() : mir_window_state_hidden;
}
bool visible_ = true;
};
struct StubSession : mir::test::doubles::StubSession
{
StubSession(int number_of_surfaces)
{
for (auto i = 0; i != number_of_surfaces; ++i)
surfaces.push_back(std::make_shared<StubSurface>());
}
std::vector<std::shared_ptr<StubSurface>> surfaces;
};
MATCHER(IsNullWindow, std::string("is not null"))
{
return !arg;
}
}
struct MRUWindowList : testing::Test
{
static auto const window_a_id = 0;
static auto const window_b_id = 1;
miral::MRUWindowList mru_list;
std::shared_ptr<StubSession> const stub_session{std::make_shared<StubSession>(3)};
miral::Application app{stub_session};
miral::Window window_a{app, stub_session->surfaces[0]};
miral::Window window_b{app, stub_session->surfaces[1]};
miral::Window window_c{app, stub_session->surfaces[2]};
void hide_window(int window_id)
{
stub_session->surfaces[window_id]->visible_ = false;
}
void show_window(int window_id)
{
stub_session->surfaces[window_id]->visible_ = true;
}
};
TEST_F(MRUWindowList, when_created_is_empty)
{
EXPECT_THAT(mru_list.top(), IsNullWindow());
}
TEST_F(MRUWindowList, given_empty_list_when_a_window_pushed_that_window_is_top)
{
mru_list.push(window_a);
EXPECT_THAT(mru_list.top(), Eq(window_a));
}
TEST_F(MRUWindowList, given_non_empty_list_when_a_window_pushed_that_window_is_top)
{
mru_list.push(window_a);
mru_list.push(window_b);
mru_list.push(window_c);
EXPECT_THAT(mru_list.top(), Eq(window_c));
}
TEST_F(MRUWindowList, given_non_empty_list_when_top_window_is_erased_that_window_is_no_longer_on_top)
{
mru_list.push(window_a);
mru_list.push(window_b);
mru_list.push(window_c);
mru_list.erase(window_c);
EXPECT_THAT(mru_list.top(), Ne(window_c));
}
TEST_F(MRUWindowList, a_window_pushed_twice_is_not_enumerated_twice)
{
mru_list.push(window_a);
mru_list.push(window_b);
mru_list.push(window_a);
int count{0};
mru_list.enumerate([&](miral::Window& window)
{ if (window == window_a) ++count; return true; });
EXPECT_THAT(count, Eq(1));
}
TEST_F(MRUWindowList, after_multiple_pushes_windows_are_enumerated_in_mru_order)
{
mru_list.push(window_a);
mru_list.push(window_b);
mru_list.push(window_c);
mru_list.push(window_a);
mru_list.push(window_b);
mru_list.push(window_a);
mru_list.push(window_c);
mru_list.push(window_b);
mru_list.push(window_a);
std::vector<miral::Window> as_enumerated;
mru_list.enumerate([&](miral::Window& window)
{ as_enumerated.push_back(window); return true; });
EXPECT_THAT(as_enumerated, ElementsAre(window_a, window_b, window_c));
}
TEST_F(MRUWindowList, when_enumerator_returns_false_enumeration_is_short_circuited)
{
mru_list.push(window_a);
mru_list.push(window_b);
mru_list.push(window_c);
int count{0};
mru_list.enumerate([&](miral::Window&) { ++count; return false; });
EXPECT_THAT(count, Eq(1));
}
TEST_F(MRUWindowList, a_hidden_window_is_not_enumerated)
{
mru_list.push(window_a);
mru_list.push(window_b);
mru_list.push(window_c);
int count{0};
hide_window(window_a_id);
mru_list.enumerate([&](miral::Window& window)
{ if (window == window_a) ++count; return true; });
EXPECT_THAT(count, Eq(0));
}
TEST_F(MRUWindowList, hiding_then_showing_windows_retains_order)
{
mru_list.push(window_a);
mru_list.push(window_b);
mru_list.push(window_c);
hide_window(window_a_id);
hide_window(window_b_id);
show_window(window_a_id);
show_window(window_b_id);
std::vector<miral::Window> as_enumerated;
mru_list.enumerate([&](miral::Window& window)
{ as_enumerated.push_back(window); return true; });
EXPECT_THAT(as_enumerated, ElementsAre(window_c, window_b, window_a));
}
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